Diagnostic Procedure
- CHECK INPUT SIGNALS (WITH CONSULT-II)
With CONSULT-II
- Start engine.
- Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
- Read out the value of "ATF TEMP SE 1" or "ATF TEMP SE 2".
OK or NG
- CHECK INPUT SIGNALS (WITHOUT CONSULT-II)
Without CONSULT-II
- Start engine.
- Check voltage between TCM connector and ground while warming up A/T. Refer to "WIRING DIAGRAM - AT - FTS ".
- Turn ignition switch to "OFF" position.
- Disconnect the TCM connector.
- Check if there is continuity between the connector terminal and ground.
OK or NG
- OK >> GO TO 7.
- NG >> GO TO 3.
- CHECK FLUID TEMPERATURE SENSOR CIRCUIT
- Turn ignition switch to "OFF" position.
- Disconnect A/T unit assembly harness connector at the transmission right side.
- Check the resistance between terminal and ground.
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- Reinstall any part removed.
OK or NG
- OK >> GO TO 7.
- NG >> GO TO 4.
- CHECK TERMINAL CORD ASSEMBLY
- Remove oil pan. Refer to "CONTROL VALVE ASSEMBLY ".
- Disconnect A/T unit assembly harness connector and control valve assembly harness connector.
- Check continuity between A/T unit assembly harness connector and control valve assembly harness connector.
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- If OK, check harness for short to ground and short to power.
- Reinstall any part removed.
OK or NG
- OK >> GO TO 5.
- NG >> Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK HARNESS BETWEEN FLUID TEMPERATURE SENSOR 2 AND CONTROL VALVE ASSEMBLY
- Disconnect fluid temperature sensor 2 harness connector and control valve assembly harness connector.
- Check continuity between fluid temperature sensor 2 harness connector and control valve assembly harness connector.
OK or NG
- OK >> GO TO 6.
- NG >> Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK FLUID TEMPERATURE SENSOR 2
Check fluid temperature sensor 2.
- Refer to "COMPONENT INSPECTION ".
OK or NG
- OK >> GO TO 7.
- NG >> Repair or replace damaged parts.
- DETECT MALFUNCTIONING ITEM
Check the following items:
- Harness for short to ground or short to power or open between TCM and A/T unit assembly harness connector.
OK or NG
- OK >> GO TO 8.
- NG >> Repair or replace damaged parts.
- CHECK DTC
Perform "DTC Confirmation Procedure". Refer to "DTC CONFIRMATION PROCEDURE ".
OK or NG
- OK >> INSPECTION END
- NG >> GO TO 9.
- PERFORM TCM INSPECTION
- Perform TCM input/output signal inspection.
- If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
- OK >> INSPECTION END
- NG >> Repair or replace damaged parts.