DTC Logic
DTC DETECTION LOGIC
DTC | Trouble diagnosis name | DTC detection condition | Possible causes |
P0740 | Torque Converter Clutch Circuit/ Open | The follow diagnosis conditions
are met, and the TCM torque
converter clutch solenoid valve
current monitor reading is 200
mA or less continuously for 0.5
seconds or more. - Diagnosis condition - Solenoid valve output current: 750 mA or more - TCM power supply voltage: 10 V < TCM power supply voltage < 16 V |
- Harness or connector
(Torque converter clutch solenoid
valve circuit is open or
shorted to power supply.) - Torque converter clutch solenoid valve |
DTC CONFIRMATION PROCEDURE
CAUTION: Be careful of the driving speed.
1.PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
Selector lever : D position
Vehicle speed : 45 km/h (28 MPH) or more
3. Stop the vehicle.
4. Check the first trip DTC.
Is "P0740" detected?
YES >> Go to TM, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK CIRCUIT BETWEEN TCM AND THE A/T UNIT
Is the check result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check the torque converter clutch solenoid valve. Refer to TM, "Component Inspection (Torque Converter Clutch Solenoid Valve)".
Is the check result normal?
YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".
NO >> Repair or replace the malfunctioning parts.
Component Inspection (Torque Converter Clutch Solenoid Valve)
1.CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check the resistance between the A/T unit connector terminal and ground.
Is the check result normal?
YES >> INSPECTION END
NO >> There is a malfunction of the torque converter clutch solenoid valve. Replace the transaxle assembly. Refer to TM, "Removal and Installation".
Description This malfunction is detected when the A/T does not shift into 1GR position as instructed by TCM. This is not only caused by electrical malfunction (circuits open or shorted) but by ...
DTC Logic DTC DETECTION LOGIC DTC Trouble diagnosis name DTC detection condition Possible causes P0743 Torque Converter Clutch Circuit Electrical The following diag ...
Power steering
WARNING
If the engine is not running or is turned
off while driving, the power assist for
the steering will not work. Steering will
be harder to operate.
When the power steering warning light
illuminates with the engine running,
there will be no power assist for the
steering. You w ...
Removal and installation
ECM
Exploded View
1. ECM bracket 2. ECM
: Vehicle front
Removal and Installation
CAUTION: Perform ADDITIONAL SERVICE WHEN REPLACING ECM. Refer to
EC-122, "Work Procedure".
REMOVAL
Remove battery. Refer to PG, "Removal and Installation".
Remove IPDM E/R. Re ...