DA11 - Check Continuity of Sensor Signal and SIG RTN Circuits

- Key "OFF".

- Suspect temperature sensor disconnected.

- Disconnect Powertrain Control Module (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 7 Engine Coolant Temperature (ECT) or 25 Intake Air Temperature (IAT) at the breakout box.

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

- Is each resistance less than 5.0 ohms?

Yes -- Replace PCM. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Service open circuits. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)