Pinpoint Test I : U0121:00, U0415:81, U0415:82, U0415:83
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
- I1 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a diagnostic scan tool, carry out the Network Test.
Does the ABS module pass the Network Test?
Yes GO to I2 No DIAGNOSE the ABS module does not communicate with the diagnostic scan tool. REFER to:MODULE COMMUNICATIONS NETWORK (2 OF 2) . - I2 CHECK THE TBM (TRAILER BRAKE CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, carry out the TBM self-test.
- Clear the TBM Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Ignition ON.
- Wait at least 10 seconds for all modules to wake up and prove out.
- Using a diagnostic scan tool, carry out the TBM self-test.
- Record the TBM Diagnostic Trouble Codes (DTCs).
Is DTC U0121:00 or U0415:XX retrieved again?
Yes GO to I3 No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. - I3 REVIEW THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE TBM (TRAILER BRAKE CONTROL MODULE) SELF-TEST
- Review the recorded Diagnostic Trouble Codes (DTCs) from the TBM self-test.
Is DTC U3003:16 or U3003:17 present in the TBM?
Yes For DTC U3003:16, GO to Pinpoint Test F For DTC U3003:17, GO to Pinpoint Test E No GO to I4 - I4 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST
- Using a diagnostic scan tool, carry out the ABS module self-test.
Is DTC U3003:16 or U3003:17 present in the ABS module?
Yes DIAGNOSE the ABS module Diagnostic Trouble Codes (DTCs). REFER to:Anti-Lock Brake System (ABS) and Stability Control . No GO to I5 - I5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0121:XX OR U0415:XX SET IN OTHER MODULES
- Using a diagnostic scan tool, carry out the self-test for all modules.
- Retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.
Is DTC U0121:xx or U0415:xx set in 1 or more modules in addition to the TBM?
Yes CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.If no service articles address this concern, INSTALL a new ABS module. REFER to: Anti-Lock Brake System (ABS) Module . No CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.If no service articles address this concern, INSTALL a new TBM module. REFER to:Trailer Brake Control Module (TBM) .