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Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1098 (Handles, Locks, Latches And Entry Systems) >> Diagnostic Tests >> Locks, Latches and Entry Systems - Module Controlled >> Pinpoint Tests >> Pinpoint Test E: DTCs B2574 And B2575: Driver Door Lock/Unlock Switch Short To Ground >> PINPOINT TEST E: DTCs B2574 AND B2575: DRIVER DOOR LOCK/UNLOCK SWITCH SHORT TO GROUND

PINPOINT TEST E: DTCs B2574 AND B2575: DRIVER DOOR LOCK/UNLOCK SWITCH SHORT TO GROUND

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. E1 CHECK THE RECORDED VSM DTCs FROM ON-DEMAND SELF-TEST 
    • Check the recorded results from the VSM self-test.
    • Is DTC B2574 or B2575 present? 
    1. YES  : Go to  E2.
    2. NO  : Go to Symptom Chart .
  2. E2 CHECK THE LH DOOR LOCK CONTROL SWITCH 
    • Disconnect: LH Door Lock Control Switch C508
    • Clear DTCs. Repeat the VSM on-demand self-test.
    • Is DTC B2574 or B2575 retrieved again? 
    1. YES  : LEAVE the switch disconnected. Go to  E3.
    2. NO  : INSTALL a new LH door lock control switch. TEST the system for normal operation.
  3. E3 CHECK THE RH DOOR LOCK CONTROL SWITCH 
    • Disconnect: RH Door Lock Control Switch C629
    • Clear DTCs. Repeat the VSM on-demand self-test.
    • Is DTC B2574 or B2575 retrieved again? 
    1. YES  : For cutaway vehicles, LEAVE the switch disconnected. Go to  E5.

      For all others, LEAVE the switch disconnected. Go to  E4.

    2. NO  : INSTALL a new RH door lock control switch. TEST the system for normal operation.
  4. E4 CHECK THE REAR DOOR LOCK CONTROL SWITCH 
    • Disconnect: Rear Door Lock Control Switch C4121
    • Clear DTCs. Repeat the VSM on-demand self-test.
    • Is DTC B2574 or B2575 retrieved again? 
    1. YES  : LEAVE the switch disconnected. Go to  E5.
    2. NO  : INSTALL a new rear door lock control switch. TEST the system for normal operation.
  5. E5 CHECK THE LOCK INPUT CIRCUIT OR THE UNLOCK INPUT CIRCUIT FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: VSM C2113b
      • Fig 1: Checking Lock Input Circuit Or Unlock Input Circuit For A Short To Ground
      GF0044482Courtesy of FORD MOTOR CO.
    • Measure the resistance between the VSM C2113b-8, circuit 119 (PK/YE), harness side and ground; and between the VSM C2113b-7, circuit 120 (PK/LG), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  E6.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  6. E6 CHECK FOR CORRECT VSM OPERATION 
    • Disconnect all the VSM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the VSM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new VSM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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