Pinpoint Test G : Engagement Quality - Park

WARNING: This page is about a different variant/trim than selected.

Normal Operation and Fault Conditions
- Park does not engage
  - Verify park is not manually released. REFER to: Transmission Park by Wire Manual Release .
  - Resolve all GSM diagnostic trouble codes (DTCs). REFER to: External Controls .
  - The C or F clutch being hydraulically stuck on can prevent the vehicle from engaging park. Check for other symptoms related to the C and F clutches and resolve those first.
  - Check the park lock pawl solenoid pin for being stuck extended. REFER to: Main Control Valve Body .
  - Disassemble and inspect the park servo valve and bore. If the valve sticks, or if the valve or bore is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
  - Inspect the park pawl, park pawl spring and park pawl actuator rod. INSTALL new components as necessary. REFER to: Transmission .
- Vehicle is stuck in park
  - Resolve all GSM diagnostic trouble codes (DTCs). REFER to: External Controls .
  - The C or F clutch being hydraulically stuck off can prevent the vehicle from releasing park. Check for other symptoms related to the C and F clutches and resolve those first.
  - Carry out the line pressure test. If line pressure is low, refer to the Line Pressure Diagnosis Chart for further diagnosis. REFER to: Special Testing Procedures .
  - Check the park lock pawl solenoid pin for being stuck extended. REFER to: Main Control Valve Body .
  - Disassemble and inspect the park servo valve and bore. If the valve sticks, or if the valve or bore is damaged, INSTALL a new main control valve body. REFER to: Main Control Valve Body .
  - Inspect the park pawl, park pawl spring and park pawl actuator rod. INSTALL new components as necessary. REFER to: Transmission .
- Park engages during start-stop events or while in stay in neutral mode
  - Resolve all diagnostic trouble codes (DTCs) related to the park lock pawl solenoid.
  - Check the park lock pawl solenoid pin for being stuck retracted. REFER to: Main Control Valve Body .
Possible Sources
- Park is manually released
- GSM fault
- Low line pressure
- Clutch fault
- Park servo valve
- Park pawl, park pawl spring, park pawl actuator rod
Diagnostic steps are not provided for this symptom or DTC. REFER to: Diagnostic Methods