Pinpoint Test G : P1780 (Low Gear Select Switch): Notes
Refer to Transmission Controls - 6F35 , for schematic and connector information.
Normal Operation and Fault Conditions
The low gear select switch is a momentary contact switch located on the end of the selector lever. Pressing the low gear select switch will allow for low (1st gear) operation or cancel low gear operation. There are no continuous DTCs for the low gear select switch but if the switch fails while the vehicle is being driven, the symptom is, transmission shifts to low when not selected or transmission goes into low when selected. This depends on how and when the switch fails.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| P1780 | TCS Circuit Failure | The low gear select switch failed during the self-test. |
Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals.
- TCS
- PCM