501-20B Supplemental Restraint System 2013 - 2014 MKZ
Diagnosis and Testing Procedure revision date: 11/1/2012

Pinpoint Test - DTC: JJ

U0146:00

Diagnostic Overview

Normal Operation and Fault Conditions

The RCM uses information contained in messages from the GWM sent on the High Speed Controller Area Network 2 (HS2-CAN).



  DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
U0146:00 Lost Communication with Gateway "A": No Sub Type Information This DTC sets if the RCM does not receive an expected message from the GWM .


Possible Sources


PINPOINT TEST A : U0146:00
WARNING: Do not handle, move or change the original horizontal mounting position of the Restraints Control Module (RCM) while the Restraints Control Module (RCM) is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy® and cause serious personal injury or death.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: SRS components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS .
NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford parts catalog to make sure the correct component is being installed. If an incorrect SRS component is installed, Diagnostic Trouble Codes (DTCs) may set.
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
A1   CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out a network test.

Does the GWM pass the network test?

Yes GO to A2
No To diagnose no communication with the GWM ,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


A2   CHECK THE RCM (RESTRAINTS CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, perform RCM self-test.
  • Using a diagnostic scan tool, clear RCM Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform RCM self-test.

Is DTC U0146:00 retrieved again?

Yes GO to A3
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.


A3   RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST
  • Check the recorded Diagnostic Trouble Codes (DTCs) from the RCM self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes
REFER to: Pinpoint Test - DTC: NN (501-20B Supplemental Restraint System, Diagnosis and Testing).
No GO to A4


A4   RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE GWM (GATEWAY MODULE A) SELF-TEST
  • Using a diagnostic scan tool, perform GWM self-test.
  • Check for recorded Diagnostic Trouble Codes (DTCs) from the GWM self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
No 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) (418-00 Module Communications Network, Removal and Installation).

REPEAT the RCM self-test. If DTC U0146:00 returns, INSTALL a new RCM .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).





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