Diagnostic Test

WARNING: This page is about a different car, the 2012 Dodge Charger. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. Using the scan tool, read all active DTCs from all modules.
2. Record all communication and low system voltage DTCs.
  Does the scan tool display any active DTCs to the conditions listed above?
  
  Yes
  - Go to DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.
  No
  - Go To 2.
CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Using 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. Using the scan tool, read the active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 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.
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.
CHECK THE (W538) FUEL LEVEL STATUS SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 1: Checking Fuel Level Status Signal Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the VSIM C1 harness connector.
3. Measure the resistance of the (W538) Fuel Level Status Signal circuit between ground and the VSIM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Go To 5.
ISOLATE THE SHORT TO GROUND IN THE (W538) CHECK THE FUEL LEVEL STATUS SIGNAL CIRCUIT

Fig 2: Checking Fuel Level Status Signal Circuit For A Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the VSIM 24 way harness connector (aftermarket light/siren controller side).
3. Measure the resistance of the (W538) Fuel Level Status Signal circuit between ground and the VSIM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Repair the (W538) Fuel Level Status Signal circuit for a short to ground.
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.
  No
  - Refer to DIAGNOSTIC CODE INDEX for the aftermarket light/siren controller and repair or replace the aftermarket light/siren controller in accordance with the manufacturer's Service Information.
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.
CHECK THE VSIM
1. Turn the ignition off.
2. Disconnect all VSIM 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 VSIM 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 VSIM 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 DTC P1462-FUEL LEVEL OUTPUT CIRCUIT LOW still displayed?
  
  Yes
  - Replace the VSIM in accordance with the Service Information.
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.
  No
  - Repair is complete. The problem may have been caused by a loose or corroded terminal.
  - Refer to STANDARD PROCEDURE and perform the BODY VERIFICATION TEST.