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Home >> Jeep >> 2021 >> Renegade Trailhawk >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> (Forward Facing Camera Module (FFCM) - Electrical Diagnostics) >> DTC Troubleshooting >> C1407-86: Acknowledge Signal Fail From Brake System Module (BSM) - Signal Invalid >> Diagnostic Test
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Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Forward Facing Camera Module (FFCM) DTCs and record on the repair order.
    2. With the scan tool, erase FFCM DTCs.
    3. Turn the ignition off.
    4. Turn the ignition on.
    5. With the scan tool, read FFCM DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

      • Go To  3
  2. ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DTCS PRESENT 
    1. With the scan tool, read ABS DTCs.

      Are there any DTCs present?

      Yes 

      No 

  3. CHECK THE WIRING AND CONNECTORS 
    1. The conditions necessary to set the DTC are not present at this time.
    2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wiring and connectors while checking for shorted and open circuits.
    3. Check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
    4. Check for any Service Bulletins that may apply.

      Were any problems found?

      Yes 

      No 

      • Test complete.