Diagnostic Test

WARNING: This page is about a different car, the 2009 Dodge Caliber. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY DTC B2339-HORN SWITCH STUCK IS ACTIVE
1. With the scan tool, erase CCN DTCs.
2. Operate the Horn Switch several times.
3. Wait 1 minute.
4. With the scan tool, read CCN DTCs.
  Does the scan tool display active DTC B2339-HORN SWITCH STUCK?
  
  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, corroded, or contaminated terminals.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
HORN SWITCH

Fig 1: Checking Horn Switch Circuit
Courtesy of CHRYSLER LLC

WARNING: Turn the ignition off, disconnect the battery and wait two minutes before proceeding.

WARNING: Do not place an intact undeployed airbag face down on a hard surface, the airbag will propel into the air if accidentally deployed, and could results in serious or fatal injury.
1. Remove the Driver Airbag in accordance with the Service information.
2. Disconnect the Steering Control Module C5 connector.
  NOTE: Before proceeding, thoroughly inspect the wiring harness and connectors between the Horn Switch for a short to ground or to any other circuit.
3. Measure the resistance between the (X3) Horn Switch Sense circuit at the C5 connector to the Radio Control Return.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Replace the Horn Switch in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 3
CLOCKSPRING

Fig 2: Checking Steering Control Module
Courtesy of CHRYSLER LLC
1. Disconnect the Steering Control Module C2 connector.
2. With the scan tool, erase CCN DTCs.
3. Wait 1 minute.
4. With the scan tool, read CCN DTCs.
  Does the scan tool display active DTC B2339-HORN SWITCH STUCK?
  
  Yes
  - Go to step 4
  No
  - Replace the Steering Control Module in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
(X3) HORN SWITCH SIGNAL CIRCUIT SHORT TO GROUND

Fig 3: Checking Horn Switch Signal Circuit
Courtesy of CHRYSLER LLC
1. Disconnect the Cluster C3 connector.
2. Measure the resistance between ground and the (X3) Horn Switch circuit.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (X3) Horn Switch circuit for a short to ground.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Replace the Cluster in accordance with the Service Information.
  - Perform BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .