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.

CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read all active DTCs from all modules.
  NOTE: Check for TIPM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
  
  Does the scan tool display any active DTCs to the conditions listed above?
  
  Yes
  - Diagnose and repair the DTC.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Go to step 2
CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. With the scan tool, read the active DTCs.
2. Erase the DTCs.
3. Turn the ignition off, wait 10 seconds, then turn the ignition on.
4. With the scan tool, read the active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go to step 3
  No
  - If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals, and repair any obvious problems.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK THE (W513) HORN SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Horn Switch Sense Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Multi-Purpose Module (Police And Taxi Interface Module-PTIM) C2 harness connector.
3. Measure the resistance of the (W513) Horn Switch Sense circuit between ground and the Multi-Purpose Module (Police And Taxi Interface Module-PTIM) C2 harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 4
  No
  - Go To step 5
ISOLATE THE SHORT TO GROUND IN THE (W513) HORN SWITCH SENSE CIRCUIT

Fig 2: Checking Horn Switch Sense Circuit For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Multi-Purpose Module (Police And Taxi Interface Module-PTIM) 24 way harness connector (aftermarket light/siren controller side).
3. Measure the resistance of the (W513) Horn Switch Sense circuit between ground and the Multi-Purpose Module (Police And Taxi Interface Module-PTIM) C2 harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Repair the (W515) Driver Seat Belt Sense circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
  No
  - Refer to electrical diagnostics for the aftermarket light/siren controller, and repair or replace the aftermarket light siren controller in accordance with the manufacturer's Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .
CHECK THE MULTI-PURPOSE MODULE (POLICE AND TAXI INTERFACE MODULE-PTIM)
1. Turn the ignition off.
2. Disconnect all Multi-Purpose Module (Police And Taxi Interface Module-PTIM) and aftermarket light/siren controller harness connectors.
3. Check for damaged or corroded pins, pinched wires, or damaged connectors, and repair any obvious problems.
4. Connect all Multi-Purpose Module (Police And Taxi Interface Module-PTIM) and aftermarket light/siren controller harness connectors.
5. Turn the ignition on.
6. With the scan tool monitor active codes as you work through the following step.
7. Wiggle the wiring harness and connectors of the Multi-Purpose Module (Police And Taxi Interface Module-PTIM) and aftermarket light/siren controller.
8. If only stored codes return continue the test until the problem area has been isolated, and repair any obvious problems.
  Is B2384-HORN SWITCH OUTPUT CIRCUIT LOW still displayed?
  
  Yes
  - Replace the Multi-Purpose Module (Police And Taxi Interface Module-PTIM) 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 is complete. The problem may have been caused by a loose or corroded terminal.