Pinpoint Test J : U0146:00
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.
- J1 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Verify there is an observable symptom present.
Is an observable symptom present?
Yes GO to J2 No The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. - J2 CHECK THE COMMUNICATION NETWORK
- Using a diagnostic scan tool, perform a network test.
Does the GWM pass the network test?
Yes GO to J3 No REFER to: Communications Network . - J3 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, check the GWM CMDTCs.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to: Communications Network . No GO to J4 - J4 CHECK FOR CHARGING SYSTEM RELATED DIAGNOSTIC TROUBLE CODES (DTCS)
- Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Are any battery voltage related Diagnostic Trouble Codes (DTCs) retrieved?
Yes DIAGNOSE the charging system. REFER to: Charging System . No GO to J5 - J5 RECHECK THE DCMR (DIFFERENTIAL CONTROL MODULE REAR) DIAGNOSTIC TROUBLE CODES (DTCS)NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during PMI or the PMI may not have been performed.
- Using a diagnostic scan tool, clear the DTCs and repeat the DCMR self-test.
Is DTC U0146:00 still present?
Yes GO to J6 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. - J6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0146 SET IN OTHER MODULES
- Using a diagnostic scan tool, clear all DTCs.
- Ignition OFF.
- Ignition ON.
- Wait 30 seconds.
- Using a diagnostic scan tool, retrieve the CMDTCs from all modules.
Is DTC U0146 set in other modules?
Yes GO to J7 No If there is an observable symptom, DIAGNOSE the observable symptom. If there is no observable symptom, the system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. - J7 CHECK FOR CORRECT GWM (GATEWAY MODULE A) OPERATION
- Ignition OFF.
- Disconnect and inspect all GWM connectors and related in-line connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect all the GWM connectors and related in-line connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new GWM. REFER to: Gateway Module A (GWM) . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.