SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 164 (ANTI-LOCK BRAKE SYSTEM)DIAGNOSIS AND TESTINGANTI-LOCK CONTROLPINPOINT TEST E: DTC C1266 ANTI-LOCK BRAKE SYSTEM (ABS) POWER VALVE RELAY CIRCUIT FAILURETESTING
2010 Mercury Mariner Hybrid, AWD

Pinpoint Test E: DTC C1266 Anti-lock Brake System (ABS) Power Valve Relay Circuit Failure: Testing

2010 Mercury Mariner Hybrid, AWDSECTION Testing
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
  1. E1 CHECK CIRCUIT 685 (BK/WH) FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: ABS Module C135.
    • Measure the voltage between the ABS module C135-25, circuit 685 (BK/WH), harness side and ground.
      Fig 1: Checking Circuit 685 (BK/WH) For Voltage
      G03988515Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to E2.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  2. E2 CHECK CIRCUIT 1203 (BK/LB) FOR GROUND 
    • Key in OFF position.
    • Measure the resistance between the ABS module C135-38, circuit 1203 (BK/LB), harness side and ground.
      Fig 2: Checking Circuit 1203 (BK/LB) For Ground
      G03988510Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to E3.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  3. E3 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect the ABS module connector.
    • Check for:
      • corrosion
      • pushed-out pins
    • Connect the ABS module connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . CLEAR the 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 the DTCs. REPEAT the self-test.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.