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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1245 (Information System And Entertainment System) >> Diagnosis And Testing >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test AH: DTC U0155 Or DTC U0155:00 >> Pinpoint Test Ah: DTC U0155 Or DTC U0155:00

Pinpoint Test Ah: DTC U0155 Or DTC U0155:00

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. AH1 CHECK FOR LOST COMMUNICATION DTCs 
    • Ignition ON.
    • Clear continuous DTCs from module.
    • 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 modules? 
    • Yes:  GO to AH2  .
    • No:  The system is operating correctly at this time. The DTC may have been set due to an intermittent fault in the network wiring.
  2. AH2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs 
    • Carry out the self-test for the following modules.
      • ACM 
      • APIM 
      • FDIM 
      • GPSM 
      • IC 
    • Are any low or high voltage DTCs recorded in any module? 
  3. AH3 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 audio system module? 
    • Yes:  GO to AH4  .
    • 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 SJB  and the module in question for an intermittent fault.

  4. AH4 CHECK FOR CORRECT IC OPERATION 
    • Disconnect the IC  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the IC  connector and make sure it seats correctly.
    • 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. REPEAT the self-test for the module(s) that set DTC U0155 or DTC U0155:00.
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