LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2169 (Information System And Entertainment System) >> Diagnosis And Testing >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test AC: DTC U0140 Or DTC U0140:00 >> Pinpoint Test Ac: DTC U0140 Or DTC U0140:00

Pinpoint Test Ac: DTC U0140 Or DTC U0140:00

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. AC1 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 U0140 or DTC U0140:00 set in any audio system module? 
    • Yes:  GO to AC2  .
    • 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. AC2 CHECK FOR BATTERY VOLTAGE OUT-OF-RANGE DTCs 
    • Carry out the self-test for the following modules:
      • ACM 
      • APIM 
      • Audio DSP  module (if equipped)
      • GPSM  (if equipped)
      • SJB 
    • Is DTC B1317, B1318, U3003:16, or U3003:17 recorded in any module? 
  3. AC3 CHECK FOR DTC U0140 OR DTC U0140:00 SET IN MULTIPLE MODULES 
    • Review the recorded results from the self-test.
    • Is DTC U0140 or DTC U0140:00 set in more than one audio system module? 
    • Yes:  GO to AC4  .
    • 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. AC4 CHECK FOR CORRECT SJB OPERATION 
    • Ignition OFF.
    • Disconnect the SJB  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the SJB  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 SJB  . REFER to MULTIFUNCTION ELECTRONIC MODULES . CLEAR all continuous DTCs. REPEAT the self-test.
    • 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.
scientia non olet · About LEMON Manuals