TD3 - Check Continuity of MLP Sensor Harness Circuits

- Key Off.

- Disconnect PCM.

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

- Disconnect MLP sensor.

- Inspect both ends of the connector for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Measure resistance between Test Pin 64 at the breakout box and MLP signal pin at the vehicle harness connector.

- Measure resistance between Test Pin 91 at the breakout box and the SIG RTN pin at the vehicle harness connector.

- Is each resistance less than 5.0 ohms?

YES -- GO to TD4. TD4 - Check MLP Circuit For Short to Power and Ground

NO -- SERVICE open circuit(s). REMOVE breakout box. RECONNECT all components. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes