95 1/2 Model

This Diagnostic Trouble Code (DTC) flashes the "CHECK TRANS" Indicator and sets the Backup Mode.




Circuit Description
Torque Management is a function that decreases the Engine torque during Transmission shifts. To do so the Transmission Control Module (TCM) exchanges information on a wire with the Engine Control Module (ECM) that governs the Engine. This wire is the Data Link Connector which is also used by the Scan Tool to communicate with the TCM and the ECM.

Diagnostic Aids
- This diagnostic is not an electrical test done by the TCM but a test between different information ("logic test").

- Detection Conditions:
a. Torque Control, failure detected.
b. Each time a shift occurs with the Torque Management active, the TCM sends a message to the ECM. If the ECM does not acknowledge this message, the DTC is stored.

- Action After The Detection Time:
- Backup Mode.

- Recovery Conditions:
- To recover do an Ignition Cycle.

NOTE:
- When connecting the TECH 1 to the Data Link Connector, be sure to turn off the Ignition Switch.
- Since the Torque Management exchanges information between the TCM and the ECM at all times, the DTC 37 is sometimes detected in the following condition. However, this is not an abnormal condition.
a. When the Engine stops while driving and then it is restarted.
b. When the Battery voltage goes down excessively and the Engine does not start again.

- When DTC 37 is detected in the above conditions, turn "OFF" the Ignition Switch, correct the abnormal condition and erase the trouble code.




DTC 37 / Flow Chart