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HOMESERVICE MANUALSJEEP2023COMPASS LIMITEDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESBODY CONTROL MODULE (BCM) - DTCS B165D-15 TO B1800-11DTC TROUBLESHOOTINGB16EF-00-LEFT PARK LAMP 1 CONTROLDIAGNOSTIC TEST
2023 Jeep Compass Limited

Diagnostic Test

2023 Jeep Compass LimitedSECTION Diagnostic Test
  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Body Control Module (BCM) DTCs and record on the repair order.
    2. Record the Environmental Data.
    3. With the scan tool, read BCM DTCs.

      Is the DTC Active?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR ADDITIONAL BCM DTCS 
    1. With the scan tool, read BCM DTCs.

      Is DTC: B163A-00-FRONT LEFT TURN LAMP 1 CONTROL also set in the BCM?

      Yes 

      • Perform the DTC: B163A-00-FRONT LEFT TURN LAMP 1 CONTROL diagnostic procedure before proceeding.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE BCM OUTPUT ON THE (L27) LEFT FRONT PARK/DRL DRIVER CIRCUIT 
    1. Turn the ignition off.
    2. Disconnect the Left Front Lamp Assembly harness connector containing the (L27) Left Front Park/DRL Driver circuit.
    3. Turn the ignition on.
    4. Turn the DRLs on.
    5. Connect a 12-volt test light between ground and the (L27) Left Front Park/DRL Driver circuit at the Left Front Lamp Assembly harness connector.

      Does the test light illuminate brightly with the Park Lamps activated?

      Yes 

      • Go To  4

      No 

      • Replace the Left Front Park Lamp in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  4. CHECK THE (L27) LEFT FRONT PARK/DRL DRIVER CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the BCM harness connector containing the (L27) Left Front Park/DRL Driver circuit.
    3. Measure the resistance of the (L27) Left Front Park/DRL Driver circuit between the BCM harness connector and the Left Front Lamp Assembly harness connector.

      Is the resistance above 3.0 Ohms?

      Yes 

      • Repair the open or high resistance in the (L27) Left Front Park/DRL Driver circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK RELATED HARNESS CONNECTIONS 
    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. Reconnect all BCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect 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 

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.