Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DTC B2371-HORN CONTROL CIRCUIT OVERCURRENT
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Operate the Horn switch several times.
4. With the scan tool, read DTCs.
  Does the scan tool display active DTC B2371-HORN CONTROL CIRCUIT OVERCURRENT?
  
  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. Refer to STANDARD PROCEDURE .
VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION
1. Turn the ignition off.
2. Inspect the following connector terminal condition. Check for signs of corrosion build up or damage that would compromise the terminal to controller pin connector.
  NOTE:
  Make sure that all in-line connectors are inspected for corrosion and/or damage.
3. Disconnect the Horn harness connectors.
4. Disconnect the TIPM C11 harness connector.
5. Visually inspect the wiring harness. Look for any chafed, pierced, pinched or partially broken wires hidden in the wire insulation.
  Were any of the above conditions found?
  
  Yes
  - Repair or replace as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
(X21) OR (X22) HORN CONTROL OUTPUT CIRCUIT HIGH RESISTANCE

Fig 1: Checking Horn Control Output Circuit For High Resistance
Courtesy of CHRYSLER GROUP, LLC
1. Connect a jumper wire between the (X21) Horn Control Output circuit and ground in the Horn 1 C1 harness connector.
2. Using a 12-volt test light connected to 12-volts, check the (X21) Control Output circuit in the TIPM C11 harness connector.
3. Connect a jumper wire between the (X22) Horn Control Output circuit and ground in the Horn 2 C1 harness connector.
4. Using a 12-volt test light connected to 12-volts, check the (X22) Control Output circuit in the TIPM C11 harness connector.
  NOTE:
  The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the excessive resistance in the (X21) or (X22) Horn Control Output circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE HORNS FOR PROPER OPERATION
1. Momentarily connect a jumper wire between the (X21) Horn Control Output circuit and B(+) in the Horn 1 C1 component connector.
2. Momentarily connect a jumper wire between the (X22) Horn Control Output circuit and B(+) in the Horn 2 C1 component connector.
  Do both horns operate properly?
  
  Yes
  - Go To 6
  No
  - Go To 5
(Z920) GROUND CIRCUIT OPEN

Fig 2: Checking Ground Circuit For An Open
Courtesy of CHRYSLER GROUP, LLC
1. Disconnect the jumper wire.
2. Using a 12-volt test light connected to 12-volts, check the (Z920) Ground circuit in the Horn 1 and 2 C2 harness connectors.
  Does the test light illuminate brightly?
  
  Yes
  - Replace the Horn(s) as necessary. Refer to HORN, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Repair the open or excessive resistance in the (Z920) Ground circuit.
  - Perform BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
TOTALLY INTEGRATED POWER MODULE
NOTE:
Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
1. Disconnect the jumper wire.
2. Using the schematics as a guide, inspect the wire harness and connectors.
3. Pay particular attention to all Power and Ground circuits.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the TIPM in accordance with the Service Information. Refer to MODULE, TOTALLY INTEGRATED POWER (TIPM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .