B1001

B1001-A/C SWITCH REQUEST INPUT CIRCUIT LOW

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





- When Monitored:
With the ignition on.

- Set Condition:
The Cluster detects low voltage (C105) HVAC MUX Control circuit.





1. CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. 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.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. A/C HEATER CONTROL
1. Turn the ignition off.
2. Disconnect the A/C Heater Control C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace the A/C Heater Control.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (C105) HVAC MUX CONTROL CIRCUIT SHORTED TO THE (C955) HVAC MUX RETURN CIRCUIT




1. Turn the ignition off.
2. Disconnect the Cluster C2 harness connector.
3. Measure the resistance between the (C105) HVAC MUX Control Circuit and the (C955) HVAC MUX Return circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the (C105) HVAC MUX Control Circuit for a short to the (C955) HVAC MUX Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (C105) HVAC MUX CONTROL CIRCUIT SHORTED TO GROUND




1. Measure the resistance between ground and the (C105) HVAC MUX Control Circuit

Is the resistance below 10K Ohms?

Yes

- Repair the short to ground in the (C105) HVAC MUX Control Circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Cluster.
- Perform the BODY VERIFICATION TEST. Body Verification Test.