Without Column Shift

P2779-AUTOSTICK DOWNSHIFT SWITCH CIRCUIT PERFORMANCE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The AutoStick Switch is integrated into the Shift Lever Assembly. The gear requested by the AutoStick selection is then sent over the CAN C bus from the Electronic Shift Module (ESM) to the TCM to engage the requested gear.

- When Monitored:
Continuously when the ignition is in the run position.

- Set Condition:
When the expected switch state is not correctly sensed by the Shifter Lever Assembly (SLA) Electronic Shift Module (ESM). If the Downshift switch signal is detected as active in gear position other than drive.





Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. NAG1 Pre-Diagnostic Troubleshooting Procedure.
SHIFT LEVER ASSEMBLY

View repair

Repair

- Using the schematics as a guide, check the Shifter Lever Assembly (SLA) Electronic Shift Module (ESM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Shifter Lever Assembly. Transmission Shifter - Removal
- Perform NAG1 TRANSMISSION VERIFICATION TEST. NAG1 Transmission Verification Test.