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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Anti-Lock Brake System - Vehicle Dynamic Systems) >> Diagnostic Tests >> Anti-Lock Control >> Pinpoint Tests >> Pinpoint Test B: DTCs C1095 and C1096 - ABS Hydraulic Pump Motor Circuit Failure/Open >> PINPOINT TEST B: DTCs C1095 AND C1096 - ABS HYDRAULIC PUMP MOTOR CIRCUIT FAILURE/OPEN

PINPOINT TEST B: DTCs C1095 AND C1096 - ABS HYDRAULIC PUMP MOTOR CIRCUIT FAILURE/OPEN

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
  1. B1 CHECK THE ABS PUMP MOTOR 
    • Key in ON position.
    • Is the ABS pump motor running all the time? 
    1. YES  : INSTALL a new ABS module and HCU. REFER to Anti-Lock Brake System (ABS) Module  and Hydraulic Control Unit (HCU) . CLEAR the DTCs. REPEAT the ABS self-test.
    2. NO  : Go to  B2.
  2. B2 CHECK THE PUMP MOTOR OUTPUT COMMAND (ABS_MTR) 
    • Connect the diagnostic tool.
    • Enter the following diagnostic mode on the diagnostic tool: ABS DataLogger
    • Toggle the ABS_MTR output command ON.
    • Does the ABS pump motor run for approximately 2 seconds? 
    1. YES  : TOGGLE the output command OFF.

      CLEAR the DTCs. 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 C1096  is retrieved, go to  B5.

      If DTC C1095  is retrieved, INSTALL a new HCU. REFER to Hydraulic Control Unit (HCU) .

      For all other ABS module DTCs  , go to the ABS Module DTC Chart.

      CLEAR the DTCs. REPEAT the self-test.

    2. NO  : TOGGLE the output command OFF and Go to  B3.
  3. B3 CHECK THE VOLTAGE TO THE ABS MODULE 
    • Key in OFF position.
    • Disconnect: ABS Module C135
      • Fig 1: Checking Voltage To ABS Module
      GF0006726Courtesy of FORD MOTOR CO.
    • Measure the voltage between ABS module C135-31, circuit 534 (YE/LG), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  B4.
    2. NO  : VERIFY BEC fuse 8 (40A) is OK. If OK, REPAIR circuit 534 (YE/LG). CLEAR the DTCs. REPEAT the self-test.
  4. B4 CHECK CIRCUIT 1205 (BK) FOR AN OPEN 
      Fig 2: Checking Circuit 1205 (BK) For An Open
      GF0006725Courtesy of FORD MOTOR CO.
    • Measure the resistance between ground and:
      • ABS module C135-45, circuit 1205 (BK), harness side.
      • ABS module C135-16, circuit 1205 (BK), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : INSTALL a new HCU. REFER to Hydraulic Control Unit (HCU) . CLEAR the DTCs. REPEAT the self-test.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  5. B5 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Key in OFF position.
    • Disconnect: ABS Module C135
    • Check the connector for:
      • corrosion.
      • spread terminals.
      • pushed-out pins.
    • Connect: ABS Module C135
    • Make sure the connector seats properly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CLEAR the DTCs. REPEAT the self-test.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CARRY OUT the self-test with the Pinpoint Test F: Spongy/Soft/Low Brake Pedal with No Warning Indicator  not applied.
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