Diagnostic Test

CHECK (C105) HVAC MUX CONTROL CIRCUIT VOLTAGE AT A/C HEATER CONTROL C1 HARNESS CONNECTOR

Fig 1: Checking HVAC MUX Control Circuit Voltage At A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the A/C Heater Control C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (C105) HVAC MUX Control circuit.
  Is the voltage above 5.2 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 VOLTAGE

Fig 2: Checking HVAC MUX Control Circuit Voltage At A/C Heater Control C1 Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Instrument Cluster C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (C105) HVAC MUX Control circuit.
  Is the voltage above 0.2 volts?
  
  Yes
  - Repair the (C105) HVAC MUX Control circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - 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