B1033-96

B1033-96-INFRARED TEMPERATURE SENSOR - COMPONENT INTERNAL FAILURE





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
When the Infrared (IR) Temperature Sensor Pulse Width Modulated (PWM) signal to the A/C Heater Control is out of range for a continuous period of 1200 msec. or more. If the A/C Heater Control detects a valid PWM signal, the DTC will change from active to stored and will stay stored for 100 ignition cycles.





Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. HVAC Pre-Diagnostic Troubleshooting Procedure.

1. CHECK IF DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read HVAC DTCs.

Is this DTC active?

Yes

- Go To 2

No

- Go To 4

2. CHECK IF THE INFRARED TEMPERATURE SENSOR IS PROPERLY CONNECTED
1. Turn the ignition off to the lock position.
2. Check the connector to Infrared Temperature Sensor for proper connection and the terminals for damage or corrosion.

Is the Infrared Temperature Sensor connector properly connected and terminals undamaged or corroded?

Yes

- Go To 3

No

- Repair connector and terminals as necessary.
- Perform the HVAC VERIFICATION TEST. HVAC Verification Test.

3. CHECK THE INFRARED SENSOR
1. Replace the Infrared Sensor.
2. Perform the HVAC VERIFICATION TEST. HVAC Verification Test.

Did the DTC reset performing the HVAC Verification Test?

Yes

- Replace and program the A/C Heater Control.
- Perform the HVAC VERIFICATION TEST. HVAC Verification Test.

No

- Test complete.

4. CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.
3. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
4. Wiggle the wiring and connectors while checking for shorted and open circuits.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the HVAC VERIFICATION TEST. HVAC Verification Test.

No

- Test complete.