Diagnostic Routine J

Diagnostic Routine J

Diagnostic Overview

Shift Fork Actuator - Electrical Fault

Refer to Wiring Diagram Set 29 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

The shift system consists of two independent sub-systems controlling the transaxle synchronizer pre-selections and engagements. This arrangement provides independent control of the two transaxles and a mechanical interlock that prevents two gears within the same transaxle from being engaged simultaneously. The TCM (Transmission Control Module) contains two electric motors that mesh with and drive the first double gear wheel, which drives the second double gear which finally drives the shift drum. Gearing between the shift motors and the drums reduce speed and multiply torque. Position sensors in the TCM (Transmission Control Module) detect motor position. Shift drum position is learned by the TCM (Transmission Control Module) during a teach-in process that involves rotating each drum.

DTC Fault Trigger Conditions






Pinpoint Test

1. Read and record all DTCs (Diagnostic Trouble Codes).

Were System Voltage DTCs (Diagnostic Trouble Codes) set?






2. Check for Shift Fork DTCs (Diagnostic Trouble Codes)

Were Shift Fork DTCs (Diagnostic Trouble Codes) set?