Diagnostic Test

WARNING: This page is about a different car, the 2024 Jeep Grand Wagoneer L and 2024 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCS.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
ABS COMMUNICATION RELATED DTCS IN OTHER MODULES
1. With the scan tool, read DTCs in the ABS Module.
  Is the ABS Module setting any DTCs against the Brake Booster Pressure Sensor?
  
  Yes
  - Perform the diagnostic procedure in the ABS Module. Refer to DIAGNOSTIC CODE INDEX .
  - Perform the ABS VERIFICATION TEST. Refer to BSCM VERIFICATION TEST .
  No
  - Replace the ABS Module in accordance with the Service Information. Refer to MODULE, BRAKE SYSTEM CONTROL (BSCM), REMOVAL AND INSTALLATION .
  - Perform the ABS VERIFICATION TEST. Refer to BSCM VERIFICATION TEST .