TCM Power Source Circuit

AA80E AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: TCM Power Source Circuit
- TCM Power Source Circuit

DESCRIPTION

When the engine switch is turned on (IG), voltage from the MREL terminal of the ECM is applied to the EFI MAIN2 relay. This causes the contacts of the EFI MAIN2 relay to close, which supplies power to terminal +B of the TCM.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK TCM (POWER SOURCE, BODY GROUND)

(a) Disconnect the A12 and E5 TCM connectors.





(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





(d) Turn the engine switch off.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- CHECK HARNESS AND CONNECTOR (TCM - EFI MAIN2 RELAY, BODY GROUND)

OK -- GO TO ECM POWER SOURCE CIRCUIT (ENGINE CONTROL SYSTEM / SFI SYSTEM) ECM Power Source Circuit