Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY DTC B1082-HVAC MUX CIRCUIT LOW IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, erase CCN DTCs.
3. Turn the ignition off, wait 10 seconds, and turn the ignition on.
4. With the scan tool, read CCN DTCs.
  Does the scan tool display active: B1082-HVAC MUX CIRCUIT LOW?
  
  Yes
  - Go to step 2
  No
  - 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.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
CHECK FOR DTC B1082-HVAC MUX CIRCUIT LOW WITH A/C HEATER CONTROL C1 HARNESS CONNECTOR DISCONNECTED

Fig 1: 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. With the scan tool, erase CCN DTCs.
5. Turn the ignition off, wait 10 seconds, and turn the ignition on.
6. With the scan tool, read CCN DTCs.
  Does the scan tool display: B1082-HVAC MUX CIRCUIT LOW?
  
  Yes
  - Go to step 3
  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

Fig 2: Checking HVAC MUX Control Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Instrument Cluster C2 harness connector.
3. 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
  - 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