Diagnostic Test
- CHECK (C105) HVAC MUX CONTROL CIRCUIT VOLTAGE AT A/C HEATER CONTROL C1 HARNESS CONNECTOR
Courtesy of CHRYSLER LLC
- Turn the ignition off.
- Disconnect the A/C Heater Control C1 harness connector.
- Turn the ignition on.
- Measure the voltage of the (C105) HVAC MUX Control circuit.
Is the voltage below 4.8 volts?
Yes
- Go to step 2
No
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
- CHECK (C105) HVAC MUX CONTROL CIRCUIT FOR A SHORT TO GROUND
- Turn the ignition off.
- Disconnect the Instrument Cluster C2 harness connector.
- Measure the resistance of the (C105) HVAC MUX Control circuit between ground and the A/C Heater Control C1 harness connector.
Is the resistance below 10K ohms?
Yes
- Repair the (C105) HVAC MUX Control circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
No
- Go to step 3
- CHECK (C105) HVAC MUX CONTROL CIRCUIT FOR AN OPEN
- Measure the resistance of the (C105) HVAC MUX Control circuit between the A/C Heater Control C1 harness connector and the Instrument Cluster C2 harness connector.
Is the resistance below 5.0 ohms?
Yes
- Replace the Instrument Cluster (CCN) in accordance with the Service Information.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
No
- Repair the (C105) HVAC MUX Control circuit for an open.
- Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
- Measure the resistance of the (C105) HVAC MUX Control circuit between the A/C Heater Control C1 harness connector and the Instrument Cluster C2 harness connector.