DTC 39

Code 39 Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION:


The ECM controls TCC operation by grounding CKT 422 through the quad-driver.

Code 39 will set when:

^ No Code 28 & 29 is present.
^ Brake switch is closed "OFF".
^ TCC is commanded by the ECM.
^ Transaxil is in high gear.
^ The engine speed to vehicle speed ratio does not indicate that the TCC is engaged.
^ All of the above for a time greater than 15 seconds.

NOTE: Because of all the possible color code combinations used on electrical wiring diagrams, always refer to ECM CONNECTOR IDENTIFICATION under ELECTRICAL AND ELECTRONIC WIRING DIAGRAMS for correct color code identification of circuit.


TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.

1. Checks fuse and brake switch.
2. Checks the ECM for proper operation.
3. Checks the internal switches in the transaxle.



DIAGNOSTIC AIDS:


A Code 39 can only be the result of a wire or CKT 420 problem between the splice and the TCC solenoid. CKT 422 problem between TCC solenoid and ECM, poor connection to ECM connector, or possibly the ECM.

If the ECM, TCC solenoid, and the TCC control circuitry are operating correctly but the TCC still does not engage properly, the problem could be hydraulic or mechanical.