Instrument Cluster

90A3-AMBIENT TEMPERATURE SENSOR CIRCUIT LOW (BCM)





For a complete wiring diagram Consult Diagrams/Electrical.





Diagnostic Test

1. CHECK FOR ACTIVE DTC
Turn the ignition on.
With the scan tool, read DTCs.
Is the DTC active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.

2. AMBIENT TEMPERATURE SENSOR
Turn the ignition off.
Disconnect the Ambient Temperature sensor.
Turn the ignition on.
With the scan tool, read DTCs.
Is the DTC active?

Yes

- Go To 3

No

- Replace the Ambient Temperature Sensor.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.

3. AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Body Control Module C9 harness connector.
Measure the resistance between ground and the Ambient Temperature Sensor Signal circuit.
Is the resistance below 10K ohms?

Yes

- Repair the Ambient Temperature Sensor Signal circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Replace the BCM.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.