Operation CHARM: Car repair manuals for everyone.

TD2 - Check Continuity of Transmission Range Sensor Harness

- Key "OFF".

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Disconnect Transmission Range (TR) sensor.

- Using a mirror, inspect both ends of transmission harness connector at TR sensor for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Measure resistance between test pin 30 at the breakout box and TR signal circuit at the TR sensor vehicle harness connector.

- Measure resistance between test pin 46 at the breakout box and SIG RTN circuit at the TR sensor vehicle harness connector.

- Is each resistance less than 5.0 ohms?

Yes -- Go to TD3.

No -- Service open circuit(s). Remove breakout box. Reconnect all components. Rerun quick test.