How to Repair Engine RPM up and Down

How to Repair Engine RPM up and Down

Model: Hyundai Sonata

Year Model: 2002

Displacement: 2000cc

Condition:

1. Engine RPM up and Down.
2. Engine Cut Off Especially when Getting Engine Hot.

Cause:

1. Due to CKP sensor wire open.
   = CKP wire covered only with Electrical tape and this the cause of resistance that affect the CKP sensor.

Diagnosis

1. Scan tool Check
   =Study P0010 CMP Sensor.
2. Check the Electrical circuit of CMP
   =Study OK
3. Check the Fuel Pressure
   = Study OK.
4. Check  The CPK by disconnecting the female &male Socket.
5. Check the electrical circuit for loose connection =Study
6. Check for the engine timing cause CMP trouble code intermittently registered to the GDS or G-Scan.Study Ok
7. Finally Open the Front Engine and check visually the CKP
   =Study CKP wire covered only with Electrical tape and this the cause of resistance that affect the CKP sensor.

Study Guide and Replace Parts

1. Replace Crankshaft Position Sensor. 

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How to repair A/T overdrive not working

How to repair A/T overdrive not working of Hyundai Trajet

Model: Hyundai Trajet

Year Model: 2004

Displacement:2700cc

Fuel: Gasoline

1) Study Condition

1. Automatic Transmission Overdrive switch not working

2) Study the Cause

1. This problem cause of electrical circuit from overdrive switch disconnected.

3) Study and Diagnosis

1. Study and Check with GDS
   = No Trouble Found
2. Study and Check fuse from overdrive circuit = OK
3. Study and Open the Steering column were the shifting lever mounted.
4. Study and Check for the wire of overdrive switch and disconnet.
5. Study and Check the B+
   = no current flows
   = Check for the socket pin, the problem found from the socket only the cover of wire connected to the socket.

4) Study Guide and Repair Procedure

• Repair The disconnected parts

more training and trouble shooting

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How to check output speed sensor code P0722

How to check output speed sensor code P0722

 

P0722 A/T Output speed Sensor Circuit - Open or Short(GND)

Study Guide

Auto Repair

Study Guide and Component Location Study Guide and General Description Study Guide and The Output Speed Sensor outputs pulse-signals according to the revolutions of the output shaft of the transmission. Study Guide and  The Output Speed Sensor is installed in front of the Transfer Drive Gear to determine the Transfer Drive Gear rpms by counting the frequency of the pulses.Study This value, together with the throttle position data, is mainly used to decide the optimum gear position. Study Guide and DTC Description Study The TCM sets this code if the calculated value of the pulse-signal is noticeably different from the value calculated, using the Vehicle Speed Sensor output, when Study the vehicle is running faster than 30 km/h. The TCM will initiate the fail safe function if this code is detected. Study Guide and DTC Detecting Condition Item to Study Detecting Condition and Study Study Possible Cause DTC Strategy ● Speed rationality check ● Signal circuit is open or short. ● Sensor power circuit is open ● Sensor ground circuit is open ● Faulty OUPUT SPEED SENSOR ● Faulty PCM Enable Conditions ● Battery Voltage ≥ 10V ● Lever position : D,3,2,L ● State of brake : OFF Threshold Value ● Output speed = 0 Diagnostic Time ● More than 1sec Fail Safe ● Locked into 3rd or 2nd gear. ● Manual shifting is possibe(2 nd → 3 rd ,3 rd → 2 nd) more cases and  information Study and Study and Study and Study and Study and Study and Study and Study

How input sensor works? code P0717

How input sensor works?code P0717

Model: Hyundai Elantra

Year Model: 2010

Fuel: Gasoline

Displacement: 1600cc

 

Transmission  Automatic Transaxle  P0717 A/T Input speed Sensor Circuit Low Input

Study Guide and Component Location Study Guide and General Description The Study Guide input(turbine) speed sensor outputs waveform signals according to the revolutions of the input shaft ,installed in front of End clutch retainer,of the transmission. The Study Guide TCM determines the input shaft speed by calculating the frequency of the pulses. This Study Guide value is mainly used to control the optimum fluid pressure during shifting. Study Guide and DTC Description The Study Guide PCM/TCM sets this code if an output pulse-signal is not detected, from the input speed sensor, when the vehicle is running faster than 30 km/h. The Study Guide Fail-Safe function will be set by the PCM/TCM if this code is detected. DTC Detecting Condition Item Study Guide Detecting Condition Study Guide Possible Cause Study Guide Study Guide and DTC Strategy ● Speed rationality check ● Signal circuit is open or short. ● Sensor power circuit is open ● Sensor ground circuit is open ● Faulty INPUT SPEED SENSOR ● Faulty PCM/TCM Study Guide Enable Conditions ● Battery Voltage ≥ 10V ● Output speed ≥ 1000rpm ● Engine speed(Only current gear is the 1st gear) ≥ 3000rpm ● Lever position : D,3,2,L Study Guide and Threshold Value ● Input speed = 0 Study Guide and Diagnostic Time ● More than 1sec Fail Safe ● Locked into 3rd or 2nd gear. ● Manual shifting is possibe(2 nd → 3 rd ,3 rd → 2 nd) Study Guide and Specification Input shaft & Output shaft speed sensor ● Type : Hall sensor ● Current consumption : 22mA(MAX) ● sensor body and sensor connector have been unified as one. Study Guide and Schematic Diagram Study Guide and Signal Waveform

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How to Repair Engine Vibration in Hyundai Sonata

How to Repair Engine Vibration in Hyundai Sonata

Some Trouble may Cause of Poor Contact of Harness, Sensor Fault, or Mechanical part that affect the normal function of Engine.

Model: Hyundai Sonata YF

Year: 2011

Displacement: 2400cc

1) Study Guide Condition:

• Engine Vibration on Idling.
• Front Engine Noise During Driving.

2) Auto Repair Cause:

1. Due to A/C compressor Internal Damage and Hard to Turn.

   

3) Study Guide Diagnosis

1. Check w/ Scan Tool = No Trouble Code
2. Check Fuel Pressure = Ok
3. Check for the Injector = OK
4. Check For the Spark plug= OK
5. Check  and turn manually the Engine to check if smoothly rotate but pull out the Spark plug.
   = Hard to turn
   = Pull out the Outside Belt then turn = OK
   = Check the all tensioneer bearing and A/C compressor
   = Found Out that the Compressor slightly stuck up

4) Auto Repair and Replace Part

1. Replace w/ new A/C compressor.

more case and Study Guide at the same time Auto Repair Procedure

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How to Repair Engine Cut Off When Shift to ‘R’ and ‘D’ Position

How to Repair Engine Cut Off When Shift to ‘R’ and ‘D’ Position

This Case may Give You Some Idea or tips so that you can analyze what ‘s going on to your Hyundai car.This Trouble actual trouble shooting that I solution.

Model: Elantra HD

Year Model: 2010

Fuel : Gasoline

Displacement: 1600cc

1) Condition

1. Engine Cut Off When Shift to ‘R’ and ‘D’ posotion

2) Cause

1. A/T valve Body

3)Diagnosis

1. Check with GDS for Trouble Code
   = Code = P0742 – Torque Converter Clutch Circuit stuck On.
2. Check for the electrical circuit = Ok
3. The possible cause of this Code valve Body and ECU
4. Fist Replace with known good ECU = The same The Problem Occurs
5. Pull the Valve And Replace with new valve Body.
6. Re-fixed all parts then Check= the Problem suddenly disappeared.

4)Replace Parts

• Assembly Valve Body.
• More Case Study and trouble code Description

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How to Check Code P0743 of Hyundai

How to Check Code P0743 of Hyundai

Sonata FL 2009  G 2.4 DOHC  Transmission  Automatic Transaxle(A5GF1)  P0743 Torque Converter Clutch Circuit Electrical

AUTO REPAIR AND Component Location STUDY GUIDE AND General Description The PCM/PCM/TCM controls the locking and unlocking of the Torque Converter Clutch ( or Damper Clutch ), to the input shaft of the transmission, by appling hydraulic pressure. The main purpose of T/C clutch control is to save fuel by decreasing the hydraulic load inside the T/C. The PCM/PCM/TCM outputs duty pulses to control the Damper Clutch Control Solenoid Valve( DCCSV ) and hydraulic pressure is applied to the DC according to the DCC duty ratio value. When the duty ratio is high, high pressure is applied and the Damper Clutch is locked. The normal operating range of the Damper Clutch Control duty ratio value is from 30%(unlocked) to 85%(locked). STUDY GUIDE AND DTC Description The PCM/PCM/TCM checks the Damper Clutch Control Signal by monitoring the feedback signal from the solenoid valve drive circuit. If an unexpected signal is monitored (for example, high voltage is detected when low voltage is expected, or low voltage is detected when high voltage is expected) the PCM/PCM/TCM judges that DCCSV circuit is malfunctioning and sets this code. STUDY GUIDE AND DTC Detecting Condition Item Detecting Condition Possible Cause DTC Strategy • Check voltage range ※ TORQUE CONV________? • Open ____________? • _________________? • _____________? Enable Conditions • 16V  Voltage Battery 10V • In gear state(no gear shifting) 0.5sec is passed from turn on the relay Threshold Value • Feedback voltage from DCC control solenoide vb-2V and DCC control duty is 100% • Feedback voltage from DCC control solenoide 5.5V and DCC control duty is 0% Diagnostic Time • ------------ Fail Safe •   STUDY GUIDE AND Specification -   -   -   - Internal resistance : 2.7~3.4Ω(68°F or 20°C) - Surge voltage : 56 V STUDY GUIDE , AUTO REOAIR , STUDY GUIDE , AUTO REPAIR , STUDY GUIDE , AUTO REPAIR STUDY GUIDE , AUTO REPAIR , STUDY GUIDE , AUTO REPAIR , STUDY GUIDE , AUTO REPAIR MORE INFORMATION AND TROUBLE STUDY