Interior Temperature Sensor

900B-COMPONENT INTERIOR TEMPERATURE SENSOR PERFORMANCE





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the Ignition Switch in the on position and the HVAC Module is awake.

- Set Condition:
This code will set when the Interior Temperature Sensor control circuit is open or shorted to voltage.





Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.
With the scan tool, record and erase all HVAC DTC's.
Operate the HVAC by changing the temperature.
Wait 30 seconds.
With the scan tool, read all HVAC DTC's.
Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1.Verification Tests

2. INTERIOR TEMPERATURE SENSOR CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the HVAC Module harness connectors.
Disconnect the Interior Temperature Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Interior Temperature Sensor Control circuit.
Is there any voltage present?

Yes

- Repair the Interior Temperature Sensor Control circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go to 3

3. INTERIOR TEMPERATURE SENSOR CONTROL CIRCUIT OPEN
Turn the ignition off.
Measure the resistance of the Interior Temperature Sensor Control circuit.
Does the ohm meter read open circuit?

Yes

- Repair the Interior Temperature Sensor Control circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go To 4

4. INTERIOR TEMPERATURE SENSOR CONTROL GROUND CIRCUIT SHORTED TO VOLTAGE
Turn the ignition on.
Measure the voltage of the Interior Temperature Sensor Ground circuit.
Is there any voltage present?

Yes

- Repair the Interior Temperature Sensor Ground circuit for a short to voltage.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Go to 5

5. INTERIOR TEMPERATURE SENSOR CONTROL GROUND CIRCUIT OPEN
Turn the ignition off.
Measure the resistance of the Interior Temperature Sensor Ground circuit.
Does the ohm meter read open circuit?

Yes

- Repair the Interior Temperature Sensor Ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Verification Tests.

No

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