Test NTC-17: Checking Ambient/Battery Temperature Sensor

NOTE: For circuit identification, see WIRING DIAGRAMS article. After each repair procedure has been completed, reconnect all components. Perform TEST VER-5 to ensure system is functioning properly. Ensure no DTCs are present before performing this test.

NOTE: Ambient/battery temperature sensor is may also be referred to as ambient temperature sensor.

Turn ignition off. Visually inspect related connectors and wiring harness for damage. Ambient temperature sensor is located on bottom of upper radiator support and may be difficult to access. See Figure. Repair connectors and wiring harness as necessary. If connectors and wiring harness are okay, reconnect all connectors and go to next step.
Turn ignition on. Using scan tool, read AMBIENT/BAT TPM DEG value. Using a thermometer, measure temperature near ambient temperature sensor in engine compartment. Compare temperature readings. If scan tool display is within 10 degrees of actual underhood temperature, no problem is indicated at this time. Test is complete. If scan tool display is not within 10 degrees of actual underhood temperature, replace ambient temperature sensor.