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Pinpoint Test D: DTC C1095 - ABS HYDRAULIC PUMP MOTOR CIRCUIT FAILURE

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.
  1. D1 CHECK THE ABS PUMP MOTOR 
    • Key in ON position.
    • Is the ABS pump motor running all the time? 
  2. D2 CHECK THE PUMP MOTOR OPERATION 
    • Key in ON position.
    • Trigger the ABS module pump motor ON active command.
    • Does the ABS pump motor run for approximately 3 seconds? 
    • Yes  : CLEAR the DTC. CHECK the yellow ABS warning indicator while driving the vehicle (brakes must not be applied) above 32 km/h (20 mph). If the yellow ABS warning indicator illuminates, RETRIEVE the DTCs. If DTC C1095 is retrieved, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE  in this article . CLEAR the DTC. REPEAT the self-test. If the yellow ABS warning indicator does not illuminate, the system is OK.
    • No  : TRIGGER the ABS module pump motor OFF active command. GO to  D3.
  3. D3 CHECK CIRCUIT 30-CF13 (RD) FOR AN OPEN 
    • Disconnect: ABS Module C155.
    • Measure the voltage between ABS module C155-1, circuit 30-CF13 (RD) harness side and ground.
      Fig 1: Measuring Voltage Between ABS Module C155-1, Circuit 30-CF13 (RD) Harness Side And Ground
      G03995537Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to  D4.
    • No  : REPAIR the circuit in question. CLEAR the DTC. REPEAT the self-test.
  4. D4 CHECK CIRCUIT 31-CF6C (BK/YE) OR 31-CF6D (BK) FOR AN OPEN 
    • Measure the resistance between ABS module C135-16, circuit 31-CF6C (BK/YE) harness side and ground; and between ABS module C135-47, circuit 31-CF6D (BK) harness side and ground. Then, measure the resistance between ABS module C135-16 circuit 31-CF6C (BK/YE) and C135-47 circuit 31-CF6D (BK), component side.
      Fig 2: Measuring Circuits 31-CF6C (BK/YE) OR 31-CF6D (BK) For Open
      G03995530Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes  : INSTALL a new hydraulic control unit (HCU). REFER to HYDRAULIC CONTROL UNIT (HCU)  in this article . CLEAR the DTC. REPEAT the self-test.
    • No  : REPAIR the circuit in question. CLEAR the DTC. REPEAT the self-test.
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