DTC 0904

SYSTEM DESCRIPTION
The ECM controls torque converter clutch solenoid valve to cancel the lock-up condition of A/T. When the solenoid valve is turned on, lock-up is cancelled. When the solenoid valve is turned off, A/T lock-up is operational.

Conditions for lock-up cancel:
- Throttle valve is fully closed (idling or deceleration)
- Engine coolant temperature is below 60°C (140°F)
- Vehicle speed is less than 64 km/h (40 MPH)
- During high-load operation




DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
WITH CONSULT
1) Turn ignition switch "ON".
2) Select "DATA MONITOR" mode with CONSULT.
3) Start engine and warm it up sufficiently.
4) Perform test drive in "D" position for at least 12 seconds continuously under the following conditions.
Engine speed: 1900 - 2500 rpm
Vehicle speed: 76 - 100 km/h (47 - 62 MPH)

OR

WITH GST
1) Start engine and warm it up sufficiently.
2) Select MODE 3 with GST.
3) Perform test drive in "D" position for at least 12 seconds continuously under the following conditions.
Engine speed: 1900 - 2500 rpm
Vehicle speed: 76 - 100 km/h (47 - 62 MPH)

OR

WITH NO TOOLS
1) Start engine and warm it up sufficiently.
2) Perform test drive in "D" position for at least 12 seconds continuously under the following conditions.
Engine speed: 1900 - 2500 rpm
Vehicle speed: 76 - 100 km/h (47 - 62 MPH)
3) Stop the vehicle, turn ignition switch "OFF", wait at least 3 seconds and then turn "ON".
4) Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.