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Home >> Jeep >> 2022 >> Gladiator Mojave, Part Time T/Case Control, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control Module (BCM) - DTCS B17F5-11 To B1830-12 >> DTC Troubleshooting >> B1815-15-Rear Driver Door Ajar-Circuit Short To Battery Or Open >> Diagnostic Test

Diagnostic Test

  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. With the scan tool, run a vehicle Scan Report, or record the Environmental Data related to the DTCs.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the recorded Environmental Data and the When Monitored Conditions above, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read Body Control Module (BCM) DTCs.

    Did the DTC return?

    Yes 

    • Go To  2

    No 

  2. BACK-PROBE AT THE LEFT REAR DOOR LATCH HARNESS CONNECTOR AND MEASURE THE VOLTAGE ON THE (G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT 
    1. Turn the ignition on.
    2. Back-probe at the component harness connector and measure the voltage on the circuit being tested. Note:  Use the wiring diagram as a guide to follow the path of the circuit.
    NOTE:

    When probing a circuit at any harness connector, always use an appropriate probing tool to prevent any possible damage to the harness connector terminals.

    Is the voltage above 10.0 volts?

    Yes 

    • Go To  3

    No 

    • Go To  4
  3. DISCONNECT THE LEFT REAR DOOR LATCH AND BCM HARNESS CONNECTORS - CHECK THE (G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT FOR A SHORT TO ANOTHER CIRCUIT AT THE BCM HARNESS CONNECTORS 
    NOTE:

    The ignition may not turn on when the BCM harness connector containing the circuit being tested is disconnected. Therefore, this step can help determine if the circuit being tested is shorted to another voltage circuit in any of the BCM harness connectors.

    1. The ignition must be off when performing a resistance check to find a short between circuits.
    2. Disconnect all Electronic Control Unit (ECU) harness connectors, along with the component harness connector containing the circuit being tested. At this time leave all in-line connectors connected. Note:  Use the wiring diagram as a guide to follow the path of the circuit.
    3. Connect one lead of the DVOM to the circuit being tested at the ECU harness connector.
    4. With the other lead of the DVOM probe all other circuits at the ECU harness connectors.
    NOTE:

    When probing a circuit at an Electronic Control Unit (ECU) harness connector, always use an appropriate back probing tool to prevent any possible damage to the ECU terminals.

    NOTE:

    With the circuit isolated there should be no continuity between the circuit being tested and any other circuit.

    Is there continuity between the circuit being tested and any other circuit?

    Yes 

    • Repair the short between the circuits that have continuity. Use the wiring diagram as a guide to trace the circuits and look for any in-line connectors to help isolate the location of the short.
    • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

    No 

    • Go To  6
  4. DISCONNECT THE LEFT REAR DOOR LATCH AND BCM HARNESS CONNECTORS - CHECK THE (G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. The ignition must be off when checking the resistance of a circuit.
    2. Disconnect all Electronic Control Unit (ECU) and component harness connectors containing the circuit being tested. Note:  Use the wiring diagram as a guide to follow the path of the circuit.
    3. Before measuring the resistance of any circuit, first measure the resistance between the two leads of the DVOM. Note:  The meter leads can add resistance to the measurement value.
    4. Connect one lead of the DVOM to the circuit being tested at the component harness connector.
    5. Connect the other lead to the circuit being tested at the ECU harness connector and measure the resistance of the circuit.
    NOTE:

    When probing a circuit at any harness connector, always use an appropriate probing tool to prevent any possible damage to the harness connector terminals.

    Is the resistance above 3.0 Ohms?

    Yes 

    • Repair the circuit for an open or high resistance.
    • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

    No 

    • Go To  5
  5. CONNECT THE BCM HARNESS CONNECTOR(S) - CONNECT A FUSED JUMPER WIRE BETWEEN GROUND AND THE (G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT - CHECK FOR ADDITIONAL DTCS 
    1. Turn the ignition off.
    2. Connect the Electronic Control Unit (ECU) harness connector(s) for the circuit being tested.
    3. Connect a fused jumper wire between ground and the circuit being tested at the component harness connector. Note:  Use the wiring diagram as a guide to follow the path of the circuit.
    4. Turn the ignition on.
    5. With the scan tool, read the BCM DTCs.

    Is DTC B1815-11-REAR DRIVER DOOR AJAR-CIRCUIT SHORT TO GROUND active?

    Yes 

    No 

    • Go To  6
  6. DISCONNECT RELATED MODULE HARNESS CONNECTIONS AND INSPECT FOR PROBLEMS 
    1. Disconnect all BCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect all BCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read BCM DTCs.

      Did the DTC return?

      Yes 

      No 

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