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Pinpoint Test Ad: DTC U0155 Or DTC U0155:00

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. AD1 CHECK FOR LOST COMMUNICATION DTCs 
    • Ignition ON.
    • Clear continuous DTCs from all modules.
    • Ignition OFF.
    • Ignition ON.
    • Wait at least 10 seconds.
    • Retrieve all continuous DTCs from all modules.
    • Is DTC U0155 or DTC U0155:00 set in any audio system module? 
    • Yes:  GO to AD2  .
    • 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.
  2. AD2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs 
    • Carry out the self-test for the following modules:
      • ACM 
      • APIM 
      • GPSM  (if equipped)
      • Audio DSP  module (if equipped)
      • IPC 
    • Is DTC B1317, B1318, U3003:16, or U3003:17 recorded in any module? 
  3. AD3 CHECK FOR DTC U0155 OR DTC U0155:00 SET IN MULTIPLE MODULES 
    • Review the recorded results from the self-test.
    • Is DTC U0155 or DTC U0155:00 set in more than one module? 
    • Yes:  GO to AD4  .
    • No:  If there is an observable symptom, GO to SYMPTOM CHART - GENERAL AUDIO SYSTEM  to diagnose the observed symptom.

      If there is no observable symptom, CHECK the MS-CAN  wiring between the IC and the module in question for an intermittent fault.

  4. AD4 CHECK FOR CORRECT IC OPERATION 
    • Ignition OFF.
    • Disconnect the IC  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the IC  connector and make sure it seats correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new IC  . REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES . CLEAR all continuous DTCs. TEST the system for normal operation.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all continuous DTCs.
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