Transmission Control Systems

DIAGNOSIS:
Engine speed Input signal circuit is open or shorted.





TROUBLE SYMPTCM:
- No lock-up (after engine warm-up)
- T OIL TEMP Indicator remains on when vehicle speed is "O".

WIRING DIAGRAM:





1. CHECK HARNESS AND CONNECTOR BETWEEN TCM AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and ECM.





3) Measure resistance of harness connector between TCM and ECM.

Specified resistance (B67) No. 5 - (659) No. 64: 1 ohm or less





4) Measure resistance of harness connector between TCM and body to make sure that circuit does not short.

Specified resistance (B67) No. 5 - Body: 1 M Ohms, or more

2. CHECK INPUT SIGNAL FOR TCM.
1) Connect connectors to ECM and TCM.
2) Turn ignition switch ON (with engine OFF).





3) Measure signal voltage for TCM.

Specified voltage (B67) No. 5 - Body: 10.5 V, or more

- Using Subaru select monitor:
(1) Connect connectors to ECM and TCM.
(2) Turn ignition switch to OFF.





(3) Connect the Subaru select monitor to data link connector.
(4) Turn ignition switch to ON (with engine OFF) and Subaru select monitor switch to ON.





(5) Start and warm-up the engine.
(6) Operate at constant engine speed.
(7) Read data on Subaru select monitor.
(8) Designate mode using function key.

Function mode: F06

SPECIFIED DATA:
Same as tachometer reading (In combination meter)