Operation CHARM: Car repair manuals for everyone.

P0743

DTC P0743 - TORQUE CONVERTER CLUTCH CIRCUIT ELECTRICAL

1. OUTLINE OF DIAGNOSIS
Judge NG when the lock-up duty solenoid becomes battery short, ground short or open circuit.

2. COMPONENT DESCRIPTION
Lock-up duty solenoid is installed to the transmission hydraulic control valve body. The duty ratio is controlled by the signal from TCM. This allows the lock-up clutch to be connected or released smoothly by controlling the lock-up control valve.




3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE




5. DIAGNOSTIC METHOD

6. DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed

7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed

8. FAIL SAFE
None

9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)