TF2 - Check OSS Circuit Continuity

- Key Off.

- Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, PCM disconnected.

- Disconnect OSS.

- Measure resistance between Test Pin 84 at the breakout box and OSS circuit at the sensor harness connector.

- Is resistance less than 5.0 ohms?

YES -- GO to TF3. TF3 - Check OSS Circuit For Short to Ground

NO -- SERVICE open circuit. REMOVE breakout box. RECONNECT all components. REPEAT Transmission Drive Cycle. REFER to TF1. TF1 - Continuous DTC 0720: Perform Transmission Drive Cycle