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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.
  1. ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, monitor the states of Brake Signal 1 and Brake Signal 2 while pressing and releasing the brake pedal several times.

      Do the states change from Pressed when the pedal is pressed to Not Pressed when the pedal is released?

      Yes 

      No 

      • Go To  2
  2. CHECK THE (B15) BRAKE SIGNAL 1 CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the PCM C1 harness connector.
      CAUTION:

      Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.

    3. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
    4. Using a 12-volt test light connected to 12 Volts, check the (B15) Brake Signal 1 circuit in the GPEC Adaptor while pressing and releasing the brake pedal several times.

      Does the test light change from illuminated when the pedal is pressed to not illuminated when the pedal is released?

      Yes 

      • Go To  3

      No 

      • Go To  4
  3. CHECK THE (B16) BRAKE SIGNAL 2 CIRCUIT 
    1. Turn the ignition on.
    2. Using a 12-volt test light connected to ground, check the (B16) Brake Signal 2 circuit in the GPEC Adaptor while pressing and releasing the brake pedal several times.

      Does the test light change from illuminated when the pedal is pressed to not illuminated when the pedal is released?

      Yes 

      • Go To  11

      No 

      • Go To  7
  4. CHECK THE (Z906) GROUND CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    Fig 1: Using 12 Volt Test Light Connected To 12 Volts To Check Ground Circuit Stop Lamp Switch Harness Connector
    GC0099964Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Stop Lamp Switch harness connector.
    3. Using a 12-volt test light connected to 12 volts, check the (Z906) Ground circuit in the Stop Lamp Switch harness connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Go To  5

      No 

      • Repair the (Z906) Ground circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (B15) BRAKE SIGNAL 1 CIRCUIT FOR A SHORT TO GROUND 
    Fig 2: Measuring Resistance Between Ground & Brake Signal 1 Circuit In Stop Lamp Switch Harness Connector
    GC0099965Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (B15) Brake Signal 1 circuit in the Stop Lamp Switch harness connector.

      Is the resistance above 10k Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the (B15) Brake Signal 1 circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  6. CHECK THE (B15) BRAKE SIGNAL 1 CIRCUIT OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (B15) Brake Signal 1 circuit between the Stop Lamp Switch harness connector and the GPEC Adaptor.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  10

      No 

      • Repair the (B15) Brake Signal 1 circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  7. CHECK THE (F202) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    Fig 3: Using 12 Volt Test Light Connected To Ground To Check Fused Ignition Switch Output (Run-Start) Circuit In Stop Lamp Switch Harness Connector
    GC0099967Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Stop Lamp Switch harness connector.
    3. Turn the ignition on.
    4. Using a 12-volt test light connected to ground, check the (F202) Fused Ignition Switch Output (Run-Start) circuit in the Stop Lamp Switch harness connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Go To  8

      No 

      • Repair the (F202) Fused Ignition Switch Output (Run-Start) circuit for an open or high resistance. Inspect the related fuse. If the fuse is open, check the circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  8. CHECK THE (B16) BRAKE SIGNAL 2 CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 4: Measuring Voltage Of Brake Signal 2 Circuit In Stop Lamp Switch Harness Connector
    GC0099968Courtesy of CHRYSLER GROUP, LLC
    1. Measure the voltage of the (B16) Brake Signal 2 circuit in the Stop Lamp Switch harness connector.

      Is there any voltage present?

      Yes 

      • Repair the (B16) Brake Signal 2 circuit for a short to voltage.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Go To  9
  9. CHECK THE (B16) BRAKE SIGNAL 2 CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (B16) Brake Signal 2 circuit between the Stop Lamp Switch harness connector and the GPEC Adaptor.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  10

      No 

      • Repair the (B16) Brake Signal 2 circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  10. STOP LAMP SWITCH 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Stop Lamp Switch and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.
    5. Look for the data to change or for the DTC to reset during the wiggle test.
    6. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      • Repair as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Replace the Stop Lamp Switch in accordance with the service information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  11. POWERTRAIN CONTROL MODULE (PCM) 
    1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Stop Lamp Switch and the Powertrain Control Module (PCM).
    2. Look for any chafed, pierced, pinched or partially broken wires.
    3. Look for broken, bent, pushed out or corroded terminals.
    4. Perform any Technical Service Bulletins that may apply.

      Were any problems found?

      Yes 

      • Repair as necessary.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

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