TD1 - DTC 634, 522, and 654

Diagnostic Trouble Code (DTC) 634 indicate the Transmission Range (TR) sensor is out of Self-Test range when the gear selector is in "PARK".

DTCs 522 and 654 indicate the gear selector was not in Park during Self-Test.

DTC 668 indicates an open in the TR circuit.

DTC 667 indicates a short to ground in the TR circuits.

Possible causes:
- Misadjusted linkage.
- Open or short in harness circuits.
- Damaged TR sensor.
- Damaged Powertrain Control Module (PCM).

- Key "OFF".

- Apply parking brake.

- Place transmission in "NEUTRAL".

- Verify that Transmission Range Sensor Tool (Rotunda T91P-7010-AHT) or equivalent fits in the appropriate slot.

- Does the tool fit properly?

Yes -- Remove tool. Go to TD2.

No -- Place the transmission in "NEUTRAL". Loosen the two TR sensor mounting bolts. Move the sensor to allow insertion of the Transmission Range Sensor Tool in the appropriate slots. Tighten the two mounting bolts to specification. Remove tool. Verify shift linkage adjustment. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)