Wednesday, June 30, 2010

Malfunction of Door Warning Light

Model:          Hyundai Grandeur (XG)
Year model:   2004
Mileage         140142km
Fuel:            Gasoline

1) Condition:

  1. The door ajar warning light fails to operate when the door is opened.
  2. Blown fuse once or twice a week.

2) Cause:

  1. A short circuit of front right side door.

3) Diagnosis:

  1. Check the door connections on the left and the right side – Trouble not found.
  2. Check the passenger junction block connector – Abnormal.
  3. Check the front right side door warning – A short  circuit between the wire and the Body.

4) Repair Guide:

  • Repair front door wiring harness.

more Trouble Shooting

Tuesday, June 29, 2010

How does CVVT Works In An Engine?

General Description:

The CVVT( Continuously Variable Valve Timing) System is installed to the chain sprocket of the intake camshaft. This system controls the intake camshaft to provide the optimal valve timing for every driving condition. The ECM controls the oil control valve (OCV), based on the signal output from mass airflow, throttle position and engine coolant temperature. The CVVT controller regulates the intake camshaft angle using oil pressure through the OCV. As Result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves, exhaust emission decrease under driving conditions.

DTC Detecting Condition

Item                 Detecting Condition                               Possible Cause
=DTC               = Determines if CAM target is aligned    =loosened CKPS
Strategy          correctly to crank                              = Timing misalignment
=Enable           =No active faults                                                   
Conditions        =Fully warm up at idle                        
= Threshold       =Case 1                                           = 1teeth misalignment at 80 *C(176 *F)<oil
value                                                                      Temperature<90*C(194*F)
= Case 2         = 2 tooth misalignment ot lower than   
                       80*C(176*F) or Higher than 90*C(194*F)
=Diagnosis       = Continuous(within 1 min.)
= Mil On          = 2 driving cycles


Engine oil Temperature:                                                                  Misalignment:
80*C(176*F)<Engine oil Temperature <90*C(194*F)                   1 Teeth

Info to Charging System

Sunday, June 27, 2010

“How to Test the Electronic Voltage Regulator”

This the continuation of Regulated Voltage Test Study 4.
  1. Turn On the Ignition switch and check to see the voltage indicates the following value.

    Voltage: Battery Voltage.

    If reads 0V, there is an open circuit in the wire between the alternator “B” terminal and the battery and the battery (-) terminal.
  2. Start the engine. keeps all light and accessories off.
  3. Run the engine at the speed of about 2,500 rpm and read the voltmeter when the alternator output current drops to 10A or less.
  1. If the voltmeter reading agrees with the value listed  in the regulating voltage table below, the voltage regulator is functioning correctly. If the reading is other than the standard value, the voltage regulator or alternator is faulty.


    Voltage regulator ambient                              Regulating Voltage
        temperature *c(*F)                                                         
        -30 (-22)                                                 14.2~ 15.3
         25(77)                                                   14.2 ~ 14.8
         135(275)                                                13.3 ~ 14.8

  2. Upon completion of the test, reduce the engine speed to idle, and turn off the ignition switch.
  3. Disconnect the battery ground cable.
  4. Remove the voltmeter and ammeter and the engine tachometer.
  5. Connect the alternator output wire to the alternator “B” terminal.
  6. Connect the battery ground cable.
    more from page #4 

Saturday, June 26, 2010

Study 4 of Auto Charging System

= Now we Study the Regulated Voltage test=
= The purpose of this test is to check that the electronic voltage regulator control voltage correctly.
  1. Prior to test, check the following items and correct as necessary.
    Check that battery installed on the vehicle is fully charged. The battery checking method is described in the section inspect “Battery”.
    Check the alternator drive belt tension. the belt tension check method is described in the section “Inspect drive belt”
  2. Turn ignition switch to off.
  3. Disconnect the battery ground cable.
  4. Connect the digital voltmeter between the “B” terminal of the alternator and ground. Connect the (+) lead of the voltmeter to the “B” terminal of the alternator. Connect the (-) lead to the good ground or the battery (-) terminal.
  5. Disconnect the alternator output wire from the alternator “B” terminal.
  6. Connect the DC ammeter (0 to 15A) in series between the “B” terminal and disconnected output wire. Connect the (-) lead wire of the ammeter to the disconnected output wire.
  7. Attach the engine tachometer and connect the battery ground cable.
more info to the study 3

Thursday, June 24, 2010

“Charging System of an Automobile Study 3”

= Output Current Test=
(Click here to Study 2)
* This test determines whether or not the alternator gives an output current that is equivalent to the normal output.
  1. Prior to the test, check the following items and correct as necessary. Check the battery installed in the vehicle to ensure that is good condition. the battery checking method is described in the section “Battery”. The battery that is used to test the output current should be that has been partially discharged. With a fully charge battery, the test may not be conducted correctly due to an insufficient load. Check the tension of the alternator drive belt”.
  2. Turn off the ignition switch.
  3. Disconnect the battery ground cable.
  4. Disconnect the alternator output wire from the alternator “B” terminal.
  5. Connect a DC Ammeter () to 15A) in series between the “B” terminal and disconnected output wire. Be sure to connect the (-) lead wire of the Ammeter to the disconnected output wire.

    Tightened its connection surely, as a heavy current will flow.
  6. Connect a volt meter(0 to 20V) between the “B” terminal and ground. Connect the (+) lead wore to the alternator “B” terminal and (-) lead wire to a good ground.
  7. Attach an engine tachometer and connect the battery ground cable.
  8. Lead the engine hood cable.
  1. Check to see that the voltmeter reads as the same value as the battery voltage. If the voltmeter read 0V, and the open circuit in the wire between alternator “B” terminal and battery (-) terminal or poor grounding is suspected.
  2. Start the engine and turn on the headlamps.
  3. Set the headlamps to high beam and the heater blower to high, quickly increase the engine speed to 2,500 rpm and read the maximum output current value indicated by the ammeter.

    After the engine start up, the charging current quickly drops.
    Therefore, the above operation must be done quickly to read the maximum current value correctly.
  1. The ammeter reading must be higher than the limit value. If it is lower but the alternator output wire is in good condition, remove the alternator from the vehicle and test it.
    Limit value: 91A min.(130A alternator.

    1) The nominal output current value is shown on the nameplate affixed to the alternator body.
    2) The output current value changes with the electrical load and the temperature of the alternator itself.
    Therefore, the nominal output current may not be obtained. if such is the case, keeps the headlamps on the cause discharge of the battery, or use the lights of the another vehicle to increase the electrical load.
    The nominal current may not be obtained if the temperature of the alternator irself or ambient temperature is too high.
    In such a case, reduce the temperature before testing again.
  2. Upon completion of the output current test, lower the engine speed to idle and turn off the ignition switch.
  3. Disconnect the ground cable.
  4. Remove the voltmeter and the ammeter  and tachometer.
  5. Connect the alternator output wire to the alternator “B” terminal.
  6. Connect the battery ground cable.

Wednesday, June 23, 2010

Charging System of an Auto bile Study 1

The charging system included a battery , an alternator with a built-in regulator , and the charging indicator light and wire.
The Alternator has built in diodes, rectifying AC
 current to DC current.
Therefore , DC current appears at alternator ,”B” terminal. In addition , the charging voltage of this alternator is regulated by the battery voltage detection system. The main component of the alternator are the rotor, rectifier, capacitor brushes, bearing and V-ribbed belt pulley. The brush holder contains a built in electronic voltage regulator.

On Vehicle Inspection:
  • Check that the battery cables are connected to the correct terminals.
  • Disconnect the battery cables when the battery is given a quick charge.
  • Never disconnect the battery while the engine is running.
Check the Battery Voltage
  1. If 20 minutes have not passed since the engine was stopped , turn the ignition switch On and turn On the electrical system(head lamp, blower motor, rear defogger ect.) for 60 seconds to removed the surface charge.
  2. Turn the ignition switch Off and turn Off the electrical system.
  3. Measure the battery voltage between the negative (-) and the positive(+) terminals of the battery.
Standard Voltage: 12.5~ 12.9V at 20 degrees Celsius (68 “F) 
If the voltage is less than specification, charge the battery.

Red more to # 2

“Charging of an Auto bile Study 2 “

Before continue to read click here first to # 1
Now Study on how to check the battery terminals and fuses.
  1. Check the battery terminals are not loosed or corroded.
  2. Check the fuses for continuity.
Inspect Drive Belt:
Visually check the belt for excessive wear, frayed cords ect.
   If any defect has been found replace the drive belt.


Cracks on the rib side of a belt are considered acceptable. If the belt has chunks missing from the ribs, It should be replace.
Visually Check Alternator Wiring and Listen for Abnormal Noise:
  1. Check that the wiring is in good condition.
  2. Check that there is no Abnormal noise from the alternator while the engine is running.
Check Discharge Warning Light Circuit:
  1. Warm up the engine and then turn it off.
  2. Turn off all accessories.
  3. Turn the ignition switch “ON” check that the discharge warning light is lit.
  4. Start the engine. Check that the lights lit. If the light does not go off as specified , troubleshoot the discharge light circuit.
Inspect Charging System
Voltage Drop Test of Alternator Output Wire.
= This test determines whether or not the wiring between the alternator “B” and the battery (+) terminal is good by the voltage drop method.

  1. Turn the ignition switch to off.
  2. Disconnect the out put wire from the alternator “B” terminal. Connect the (+) lead wire  of ammeter to the “B” terminal of alternator and the (-) lead wire of ammeter to the output wire. Connect the (+) lead wire of voltmeter to the “B” terminal of alternator and the (-) lead wire of voltmeter to the (+) terminal of battery.
  1. Start the engine.
  2. Turn on the headlamps and blower motor. and set the engine speed until the ammeter indicates 20A. And then, read the volt meter at this time.
  1. The volt meter may indicates the standard value.(Standard value: 0.2V max)
  2. If the value of the voltmeter is higher than expected (above 0.2V max). poor wiring is suspected. In this case check the wiring from the alternator “B” terminal to the battery (+) terminal. Check for loosed connections, color change due to an overheated harness, ect. Correct them before testing again.
  3. Upon completion of the test, set the engine speed at idle. Turn off the headlamps, blower motor and the ignition switch.
  4. More Study

Monday, June 21, 2010

How to Check a Good Ignition Coil-Ignition System

Ignition timing is controlled by the electronic control ignition timing system.The standard reference ignition timing data for the engine operating conditions are preprogrammed in the memory of the ECM (Engine Control Module).
The engine operating condition, are detected by the various sensor.Based on  this sensor signals and ignition timing data,signal to interrupt the primary current are sent to the ECM. the ignition coil is activated, and timing is controlled.
On Vehicle Inspection = Spark Test
  1. Remove the Ignition coil connector.
  2. Remove the ignition coil.
  3. Using a spark plug socket, remove the spark plug.
  4. Install the sparkplug to the ignition coil.
  5. Ground the spark plug to the engine.
  6. Check is spark occurs while engine is being cracked.

    Before Cracked the engine it is necessary to remove
     the fuel pump relay from the fuse box. And the engine will crack within 5-10 seconds only.
  7. Inspect the spark plugs.
  8. Using the sparkplug socket install the sparkplug.
  9. Install the ignition coil.
  10. Reconnect the ignition coil connector.

    Spark Test
Spark test
Check the connection of ignition coil connector --–Bad---> Connect securely.

Check the ignition -----------------------------------Bad----->Replace the ignition coil.


Check the power supply of ignition coil
1) Turn ignition switch on.                  ------------Bad------> Check wiring between ignition switch 
                                                                                   and ignition coil
2) Check that there is battery voltage
    at ignition coil positive terminal.


Check the camshaft position sensor-------------Bad-------> Replace camshaft position sensor.

Check the crankshaft position sensor-----------Bad------> Replace crankshaft position sensor.
Check ignition signal from ECM-----------------Bad------> Check wiring between ECM and ignition coil
                                                                             and then try another ECM.

Try another ignition coil.

Inspect the Spark plug
1) Remove the ignition coil connector.
2) Remove the ignition coil.
3) Using a spark plug socket, remove the spark plug.
4) Inspect the electrodes and ceramic insulator.
Condition Dark deposits White deposits


Fuel mixture too rich
-low air intake
-fuel mixture too lean
-Advanced ignition timing
-Insufficient plug tightening torque

5)Check the electrodes gap.
Unleaded: 1.0~ 1.1 mm(0.0394~0.0433 in)
Leaded   : 0.8~ 0.9mm(0.0315~0.0354 in)
Inspect the Ignition Coil

1) Measure the primary coil resistance between terminals(+) and (-)
    = Standard value- 0.62 ohms + or – 10%

Sunday, June 20, 2010

Engine and Transaxle assembly

Study guide for disassembling a Hyundai V6 Engine, This may give a little knowledge and disassembling Engine and Transaxle.
  • Use fender covers to avoid damaging painted surfaces.
  • To avoid damage, unplug the wiring connectors carefully while holding the connector portion.
  • Mark all wiring and hoses to avoid misconnection.
  • Turn the crankshaft pulley so that the No. 1 piston is at top dead center.
1) Disconnect the negative from the battery.
2) Remove the engine cover.
3)Remove the air duct.
4) Remove the intake air hose and air cleaner assembly.
  1. Disconnect the Air flow Sensor connector.
  2. Disconnect the breather hose (B) from the air cleaner.
  3. Disconnect the ECM connector.
  4. Remove the intake air hose (C) and air cleaner.
5) Remove the front wheels.
6) Remove under cover.
7) Drain the engine coolant.Remove the radiator cup to speed draining.
8) Remove upper radiator hose and lower radiator hose.
9) Remove trans axle oil cooler hose.
10)Remove fuel hose and PCSV hose.
11)Remove engine wiring.
   1) Disconnect the RH oxygen sensor connector.
2) Disconnect power steering oil pressure sensor connector.
   3) Disconnect RH injector connector and ignition coil connector.
   4) Disconnect OCV connector and knock sensor connector.
   5) Disconnect LH front oxygen sensor connector.
   6) Disconnect alternator connector.
   7) Disconnect LH ignition coil connector, injector connector condenser connector and ground, and remove    wiring harness protector.
   8) Disconnect LH CMPS and oil pressure switch connector.
   9) Disconnect PCSV connector and MAP sensor connector.
10) Disconnect RH CMPS and OTS connector.
11) Disconnect ETC connector and knock sensor connector.
12) Disconnect water temp. connector.
13) Disconnect LH  rear oxygen sensor connector and crankshaft position sensor connector.
12) Disconnect the trans axle wire harness connector and remove trans axle control cable.
13) Disconnect EPS connector.
14) Remove heater hose.
15) Remove brake vacuum hose.
16) Remove power steering pump hose.
17) Remove A/C compressor hose.
18) Drain trans axle oil.
19) Remove  lower arm ball joint.
20) Remove tie rod end ball joint
21) Remove stabilizer link.
22) After removing the split pin and nut from steering bar tie rod, disconnect it.
23) Remove the power steering return hose. and drain power steering oil.
24) Remove front roll stopper mounting bolt.
25) Remove rear roll stopper mounting bolt.
26) Remove steering u joint mounting.
27) Remove front exhaust pipe.
28) Supporting the cross member with a jack, remove the stay with the mounting bolt.
29) Remove drive shaft from trans axle.
30) Install jack for supporting the engine and trans axle assembly.
31) Remove the engine mounting bracket.
32) Remove the trans axle bracket.
33) Finally jack up the vehicle
more study.

Saturday, June 19, 2010

Engine Stalling Occurred on Hyundai Trajet(FO)

Model: Trajet (FO)
Year Model: 2006
Displacement: 2700cc
Fuel: Gasoline
System: Automatic Transaxle System
Subject: Engine Stalling.
1) Trouble Condition:
  1. Intermittent Engine Stalling when cornering or waiting for signal lamp.
2)  Trouble Cause:
  1. The ATF level gause has been loosened.
3) Trouble Diagnosis:
  1. Scan tool check
    = Diagnostic trouble code (P0707 A/T range switch open/short circuit).
  2. Check for A/T range switch the connector seperated. oil flows into connector.
4) Repair Guide:
  1. Clean the dirty part of range switch.
  2. Replace the level gauge.

Friday, June 18, 2010

Abnormal Windshield Wiper – Ground Wiring

Model Accent (LC)
Year Model: 2004
Displacement: 1300cc
Fuel: Gasoline
Mileage:126487 km
Subject: Abnormal Windshield Wiper – Ground Wiring
1) Trouble Condition:
  1. The windshield operates when operating the rear defogger and the air conditioner.
  2. The head lamp and the tail lamp fail to operate.
  3. The door is lock by it self when operating the wiper motor switch.
2) Trouble Cause:
  1. Abnormal ground point of the main wiring G06.
  2. Abnormal tightening of the G06 ground point 10 mm bolt.
3) Diagnosis:
  1. Visually inspect after removing the right bulb – Normal
  2. Inspect the power supply and ground condition.
    = Inspect the power supply line(+) using test lamp: Normal
  3. Inspect the dimmer switch.
    = Inspect the contact condition of switch using multi meter: Normal.
    = Inspect the power w/c is inputted up to switch.
    = Inspect the ground line  using test lamp =  Abnormal.
  4. Inspect the  wire from M10-2 connector to G06 ground point = Normal
  5. Inspect the Go6 ground point = Poor contact.
4) Repair Guide:
  1. Repair wiring.

Thursday, June 17, 2010

Can Penetrate a Problem to the New Model Auto bile?

Model: Sonata (YF)
Year Model: 2011
Displacement: 2400cc
Fuel: Gasoline
Mileage: 5000km
T/A: Auto
1) Trouble Condition:
  1. Driver Power seat not working.
2) Trouble Cause:
  • Loosed Power seat 30 amp fuse.
  • Loosed circuit connector.
3) Diagnosis:
  1. Scan tool check:
    = No trouble found.
  2. Actuation test not working.
  3. Check the Location of fuse from the GDS (Fuse and Relay Information) = OK
  4. Check the the fuse if there is power flowing with Test lamp, first attempt = Fail no power.
  5. Pull out the fuse and clean.
  6. Check again power is flowing but still the power seat not working.
  7. Check the power from the power fuse the socket connector = Ok, Circuit connector to the switch = Fail no Power.
  8. Disconnect the circuit connector and clean.
  9. Reconnect again the circuit = Power seat now working.
4) Repair Guide:

Monday, June 14, 2010

Engine Abnormal Vibration on Idling,matrix

Another Trouble that for me to Explore, This trouble cause by loosed terminal ground and injector.
Model:Hyundai Matrix(FC).

Year Model: 2006
Mileage: 130782km
Fuel: Gasoline
Displacement: 1600cc
T/A: Auto
1) Trouble Condition:
  • Engine Abnormal Vibration on Idling even the engine cold or hot condition.
2) Trouble Cause:
  1. Due to Loosed ground terminal and clogged injector 1 & 4.
3) Diagnosis:
  1. Scan tool check:
    = TR
  2. Check current data of engine:
    = some sensor indicated that not supported.
    a) Oxygen sensor.
    b) map sensor.
    c) coolant temperature sensor.
    d)battery voltage.
    e) data of injector is 13.5 (Abnormal)
  3. Check the current data of TR switch : Normal operation.
  4. Check compression test: Ok with in  specification.
  5. Check spark from spark plug: Ok
  6. Fuel pressure test: Ok
  7. Visually check up.
  8. I was observed that if the engine is running the main relay getting abnormal hot and visually Check that all terminal wire seems like melting indication that also terminals getting hot.
  9. Check all wires, socket terminal and ground terminal .found out that ground terminal beside the TCM(Transmission Control Module) loosed.
    = Re fixed it.
  10. current data of engine operated normally but the engine vibration still occurred.
  11. Actuation test: Ok of some sensor, But from injector there is an abnormality in actuation the # 1 & 4.
4) Repair Guide:

Sunday, June 13, 2010

Unordinary Trouble,Engine not Cranking

This Problem gave to me my workshop manager due to the first technician who work of this car conceive and give it to manager, first thing i thing about it before start to work why and where does this trouble. It is from electrical or mechanical. Again before i start ,I ask background of this car to the first technician if what are the parts he check.Because it is very important for us to know the problem and background. thinking of it not ordinary trouble only.
1) Trouble Condition;
  • Engine not Cranking.
2) Trouble Cause:
  • malfunctioning passenger fuse box due to jump wire to the CAN wire. of the data link connector.
3) Diagnosis:
  1. Scan tool check.
    = No trouble found.
  2. Battery voltage check.
    = check battery with battery tester: ok.
  3. check the wire of starter solenoid switch: No power going to starter.
  4. check for the fuse : The fuse Ok.
  5. Check the starter relay for function: The relay is Good.
  6. check  the current of relay power and ground,
    = Hot at all time circuit: Ok 12V
    = Ground terminal:Ok
    one terminal from Ignition Switch no power at all condition.
  7. Found out that the passenger fuse box malfunction internal damage.
    = the Question is WHY DOES FUSE BOX DAMAGE? 
    = As taxi car check the taxi meter and top light: found out that one wire directly connected to CAN low terminal in the data link connector,This is the main cause why this problem occurred.
4) Repair Guide:

Engine Suddenly Loosed Power During Driving .

Sometimes Trouble occurred due to Electrical Circuit or Electrical wires loosed from the terminal pins
as this day that I encounter. On idling the Engine is good even acceleration but in actual driving on high way, suddenly loosed the power.take a trouble code with GDS(Global Diagnostic System)
data trouble code not found.
1) Trouble Condition :

Engine Suddenly loosed Power During Driving.
2) Trouble Cause:
= Loosed Main Relay Pin of Engine Compartment Fuse box.
3) Diagnosis:
  1. Check with GDS to Confirm the trouble code as referral of trouble occurred.
    = CKP(Crankshaft Position Sensor)
    CKP Description
    = Different from the existing cam phase angle type.CVVT is the device w/c varies cam phase angle continuously to be optimum.And w/ engine oil pressure, It operates.
    CVVT consists of OCV and phaser. OCV mounted on cylinder head, controls the amount and direction of oil delivered to cam phaser by oil valve w/c is connected to a solenoid.Cam pheser , rotating cam phaser rotor w pressure and amount of oil produced by OCV , rotates camshaft forcefully for or against the rotating direction and finally, cam phase changes with the appliance of CVVT, engine power, fuel efficiency and quality of exhaust gas are improved.  
    Detecting Condition:
    = Determines if the Cam target is aligned correctly to crank.
    = Real Offset value.
  2. Check the current data of CKP: Normal Function.
  3. So are all possible cause are normal = we will visually check.
  4. Check the engine compartment fuse box if there is relay of fuse loosed from its pin.
    = found out that main relay loosed from its pin, So check and retightened the pin. make roadtest still the problem occurred. replace with good relay.
    = the problem automatically solved.
4) Repair Guide:

Thursday, June 10, 2010

Stopped Hyundai Motor’s Production in India

MUMBAI: A strike that stopped Hyundai Motor's production in India for two days was called off on Wednesday night after India's top car exporter agreed to consider rehiring dozens of workers dismissed in the wake of violent protests, the company said.
In government-brokered talks, Hyundai agreed to consider reinstating on ``humanitarian grounds'' 35 employees who were dismissed after earlier protests, the company said in a statement. A committee of company and government officials and workers will together decide on rehiring.
Hyundai had already taken back 20 of the 87 workers fired after protesters damaged property and beat up guards and was reluctant to rehire more lest it set a bad example of impunity.
"The problem is 80 percent OK," K. Thangapandian, vice president of the Hyundai Motor India Employees Union, which led the strike, said in an interview Wednesday.
Thangapandian said 200 workers arrested Tuesday when police entered the factory and broke the strike would likely be released by Thursday evening.
As part of the deal, Hyundai has agreed to reinstate them in their jobs and without punishment, he said.
This is the fourth strike since 2008 at Hyundai's plants in Sriperumbedur, outside the growing auto hub of Chennai, in the southern state of Tamil Nadu.
Persistent labour unrest has pushed Hyundai, which pioneered the idea of using India as a small car production hub, to move some production to Turkey, closer to its major export market of Europe.
The two-day stoppage resulted in losses of about $28 million, Hyundai said. more info

Hyundai Motor to Donate 1 Million Soccer Balls to Africa

Hyundai Motor, a sponsor of the 2010 World Cup, plans to donate one million soccer balls to Africa.
The balls will be delivered to African children under the names of people who purchase a Hyundai vehicle or members of the automaker's official micro-website set up for this year's soccer event.

The first ball was donated by figure skating gold medalist Kim Yu-na and was delivered to UN Secretary General Ban Ki-moon at an event in Johannesburg on Tuesday.
The balls will be distributed through international organizations to countries like South Africa and Egypt.
more info

Could you Imagine How Hard to find out knocking noise?

So let me share my another experience today on how Hard to found out the underneath noise occurred in Hyundai Genesis BH, this morning i have job card and the problem is underneath knocking if you turn the steering wheel going to right or left.
Model:  Genesis (BH)
Model year: 2009
Displacement: 3800cc
Fuel: Gasoline
mileage: 21657 km
T/A: Auto 
Trouble Condition:
  • Underneath knocking noise if you turn the steering wheel going to right or left
Trouble Cause:
  • Steering Gear box ,
    = drive a car at 10km/hr then make a full turn the steering wheel to right then immediate return.
= First step i make road testing to prove the noise and to analyze where is it come from.If from the right front,rear? or from left front, rear. ok i found out that the noise occurred at the front left.2ndly step i make is to check all bolts and not and retightening them all, Again i will drive the car outside.obtusely the problem still unsolved, one thing i observe while driving the steering wheel seems like a little hard to the normal steering.
I decided to test a new steering gearbox a result the problem wasn't appear.
Trouble Repair Guide:

Tuesday, June 8, 2010

Description of Hyundai Alternator

The charging system included a battery, an alternator with a built-in regulator, and the charging indicator light and wire.
The Alternator has eight built-in diodes, each rectifying AC current to DC current.
Therefore, DC current appears at alternator "B" terminal.
In addition, the charging voltage of this alternator is regulated by the battery voltage detection system.
The alternator is regulated by the battery voltage detection system. The main components of the alternator are the rotor, stator, rectifier, capacitor brushes, bearings and V-ribbed belt pulley. The brush holder contains a built-in electronic voltage regulator.

Monday, June 7, 2010

Engine Hesitation - Spark Plug

This is field case trouble also one of my trouble encountered today as a technician. Some there are trouble that easy to think But its hard to find out when it come from, and also some trouble that its hard to think because of some other system that connected. But its easy to get where is this start, I have this trouble to day Elantra (HD).
 Model: Elantra (HD)
.Model Year: 2009.
 Displacement: 1600cc
 Fuel: Gasoline.
 Mileage: 40321km.

1) Trouble Condition:
  1. Engine Hesitation When Start in cold condition.
  2. Poor Engine power in warm condition.
2) Trouble Cause:
  • Number 3 ignition coil cracked.  
3) Trouble Diagnosis:
  1. Scan tool Check = No trouble found.
  2. Inspect the engine condition with the ignition coil coil removed one by one.
    (engine Starting Condition)
    = Engine does not change when the # 3 cylinder is removed.
  3. Inspect waveform using Scan tool.
    = Abnormal wave in # 3 cylinder.
  4. Check all ignition coil.
    = Abnormal condition (Number # 3 is cracked)
    = After replacing the ignition coil, the engine operates normally.
4) Repair Guide:
    Replace the ignition coil # 3.

Saturday, June 5, 2010

Azera(TG) Engine Dragging and Cut Off After 3 min. Running

Model: Azera (TG) Year model:2009 mileage:5o231km
Displacement:2700cc Fuel: Gasoline T/A: Auto
Subject: Engine Dragging and Cut Off After 3 min. running

1) Trouble Condition:

  • Engine Dragging and Cut Off After 3 min. running.
  • Engine No power on Acceleration.

2) Trouble Cause:

  1. Engine Dragging and Cut Off After 3 min. Running,
    = CKP(
    Crankshaft Position Sensor)
    = OCV(Oil Control Valve)

3) Diagnosis:

  1. Scan Tool Check
    = Trouble Code: P0016 – Cranckshaft and  camshaft correlation.
  2. Check the Current Data of CKP = Out of Specification= Replace w/ New
    = the Engine now Have power on acceleration but still Cut off occurred.

According to the General Description of this Trouble code,The CVVT(Continuously Variable Valve Timing). This system Controls the intake camshaft to provide the optimal valve timing for every driving condition. The ECM(Engine Control Unit) controls the OCV, based on the signal output from the mass air flow, Throttle Position and engine coolant temperature. The CVVT controller regulates the intake camshaft angle using oil pressure through the OCV. As a result , the relative position between crankshaft and camshaft become optimal, and the engine torque improves, fuel economy improves, exhaust emissions decrease under overall driving conditions.

= Try a good condition OCV, As a result the Engine operates normally. 

4) Repair Guide:

Replace Parts:

  1. CKP(Crankshaft Position Sensor)
  2. OCV(Oil Control Valve)

more info:

Friday, June 4, 2010

Engine Hard Start & Excessive White Smoke

Model: Azera(TG) Year model: 2008 mileage: 74236km
Displacement: 2700cc Fuel: Gasoline T/A: Auto
Subject: Engine Hard Start & Excessive White Smoke and Engine Cut Off after 3 minute running.
1) Trouble Condition:
  1. Engine Hard Start & excessive White Smoke
2) Trouble Cause:
  1. Scan tool check.
    = P0016 Crankshaft and Camshaft correlation.
  2. Visually check inside the engine,pull out the cylinder head cover = Full of hardened oil deposited inside.
3) Repair Guide:
  1. pull out the engine to overhaul.
  2. Visually check the Engine mechanism.

    a) Excessive oil deposited from the valve seat.
    b) Excessive piston ring clearance.
    c) Slight Scratch from the cylinder bore.
  3. Replace parts:
    a) overhauling gasket.
    b) piston w/ pin.
    c) piston ring.
    d) main bearing.
    e) connecting rod bearing.
    f) cylinder bore machining(honing)
  4. After assembling and start the engine = the engine operates normally.
  5. MORE STUDY  & leave comment

Thursday, June 3, 2010

Terracan(HP)Engine Hesitation and Stalling-Fuel Filter

Model:Terracan(HP) Yearmodel: 2004 Mileage: 98341km
Displacement:2900cc Fuel:Diesel T/A Auto
Subject:Engine Hesitation and Staling-Fuel Filter
1) Trouble Condition:
  • Engine Hesitation and Stalling DUring Driving.
2) Trouble Cause:
  • Corrosion in the Fuel FIlter.
3) Trouble Diagnosis:
  1. Scan tool check.
    = No trouble Found
  2. Check the Fuel System.
    = No water in the fuel tank and the fuel line system.
  3. Check the fuel filter.
    = The excessive corrosion and deposits are found.
  4. Check the returned amount of fuel injector. 
    = The injector have been damaged.
    = After replacing the fuel filter and injectors, the engine operates normally.
4) Trouble Repair Guide:

Wednesday, June 2, 2010

Santa Fe(SM)-Inoperative Back-up Lamp

Model: Santa Fe Year model:2004 Mileage: 96412km
Displacement: 200cc Fuel:Diesel T/A: Auto
Subject: Inoperative Back-up Lamp

1) Trouble cause:
  1. Rear back-up lamp doesn’t operate when the shift lever is in ‘ Reverse’ position.
2) Trouble Cause
  1. Malfunction of the water separator sensor at fuel filter.
3)Trouble Diagnosis:
  1. While cranking the engine in the morning, the fuse(10A) for back-up lamp water separator is opened intermittently.
    = The symptom is not happened when restarting after driving.
  2. After replacing fuse(10a),the fuel water separator indicator light illuminates dimly in the key ‘ON’ position.
  3. If the ignition key is switched ‘ON’  the fand ‘Off’ for ten times,the fuse (10a) is opened again.
  4. Check the water separator sensor.
    = The sensor resistance is lower than normal.
  5. Malfunction of the water separator sensor.
    =after replacing   ger,the problem is solved.
    <Fuel water eparator indicator light in cluster intrument illumunatas dimly>
  6. 4)Trouble guide
    Replace the water separator.

Tuesday, June 1, 2010

Hyundai Coupe/Tiburon First began production

Tiburon first began production in late 1996. It was available in a few foreign markets with engine choices of either 1.6L or 1.8L. In the United States, the Tiburon was first offered in 1997 with base models using the Elantra's 1.8L 130 hp (97 kW) engine while the upscale FX received a 2.0L four-cylinder engine. The 2.0L was rated at 140 hp (104 kW) at the crankshaft (the car's manual specifies 102 kW (137 hp) at the flywheel). Base weight was around 2,550 lb (1,150 kg), giving the RD Tiburon a higher power to weight ratio than the newer GK 2.0L. The 2.0L produces a 0–60 mph time of ~8.2,[3] with a 1/4 mile time of ~16 seconds. In 1998 the Tiburon lost its weaker 1.8L engine, giving both models the 2.0L. All versions of the Tiburon manufactured from 1996–2002 are known as "RD" Tiburons. There were various options, with or without ABS, 2 airbags, leather, and sunroof.
Various special editions were also produced, focusing primarily on cosmetic modifications and improvements. In the UK, Hyundai's entrance into the Formula 2 World Rally Championships saw the release of the "F2" and "F2 Evolution" models in 1998 and 1999 respectively.
The F2 modifications included a front spoiler lip, mesh grill, 16" mesh alloy wheels (with Pirelli P7000 tyres), uprated Sony stereo, customised sill plates and gearstic
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Sonata 2011 Airbag Indicator On Always

Sonata (YF)
Year Model:
Airbag System
Subject: Air bag Indicator on always – Airbag Module.
1) Trouble Condition:
  1. Airbag Indicator always  Turn On
2) Trouble Cause:
  • Internal fault of airbag control module(SRSCM).
3)Trouble Diagnosis:
1) Scan tool check=
   code           Items
B 1620 Internal parts fault replace SRSCM
B 1684 ECO configuration is difference

2) DTC is detected.
=But DTC B 1620 is generated again(SRSCM internal failure.
4) Trouble Repair Guide
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