DA11 - Check Continuity of Sensor Signal and SIG RTN Circuits

- Key Off.

- Suspect temperature sensor disconnected.

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

- Install breakout box, leave PCM disconnected.

- Measure resistance between sensor signal circuit at the temperature sensor vehicle harness connector and Test Pin 38 (ECT) or 39 (IAT) at the breakout box.

- Measure resistance between SIG RTN circuit at the temperature sensor vehicle harness connector and Test Pin 91 (SIG RTN) at the breakout box.

- Is each resistance less than 5.0 ohms?

YES -- REPLACE PCM. REMOVE breakout box. RECONNECT components. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

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