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Pinpoint Test I: DTC C1095 AND C1096: Testing

WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. I1 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 hydraulic control unit (HCU). REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE  and HYDRAULIC CONTROL UNIT (HCU)  in this article. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to I2.
  2. I2 CHECK FOR ABS MODULE DTCs 
    • Connect the diagnostic tool.
    • Key in ON position.
    • Clear all ABS module DTCs.
    • Enter the following diagnostic mode on the diagnostic tool: Self-test - ABS Module
    • Retrieve and record the ABS module DTCs.
    • Does DTC C1095 or C1096 return? 
    1. YES  :

      If DTC C1095 is retrieved, go to I4.

      If DTC C1096 is retrieved, INSTALL a new ABS module and hydraulic control unit (HCU). REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . Clear the DTC's. CARRY OUT the self-test with the brake pedal not applied.

      If DTC C1096 returns, INSTALL a new HCU. REFER to HYDRAULIC CONTROL UNIT (HCU) . CLEAR the DTCs. CARRY OUT the self-test with the brake pedal not applied.

    2. NO  : Go to I3.
  3. I3 CARRY OUT AN ABS EVENT 
    • Clear the DTCs, road test the vehicle at speeds greater than 32 km/h (20 mph) and carry out an ABS event.
    • Retrieve the ABS module DTCs.
    • Did DTCs C1095 and C1096 return? 
    • Yes  :

      If DTC C1096 is retrieved, go to I6.

      It DTC C1095 is retrieved, INSTALL a new hydraulic control unit (HCU). REFER to HYDRAULIC CONTROL UNIT (HCU) . Clear the DTC's. CARRY OUT the self-test.

    • No  : The system is operating correctly at this time.
  4. I4 CHECK THE VOLTAGE TO THE ABS MODULE 
    • Ignition off.
    • Disconnect: ABS Module C135.
    • Measure the voltage between the ABS module C135 pin 9, circuit 532 (OG/YE), harness side and ground; and between the ABS module C135 pin 25, circuit 532 (OG/YE), harness side and ground.
      Fig 1: Measuring Voltage Between ABS Module C135 Pin 9, Circuit 532 (OG/YE) & Ground & Between ABS Module C135 Pin 25 & Ground
      G03891577Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to I5.
    • NO  : VERIFY BJB fuse 11 (60A) is OK. If OK, REPAIR circuit 532 (OG/YE). CLEAR the DTCs. REPEAT the self-test.
  5. I5 CHECK THE ABS MODULE GROUND CIRCUITS FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between the ABS module C135 pin 8, circuit 530 (LG/YE), harness side and ground; and between the ABS module C135 pin 24, circuit 530 (LG/YE), harness side and ground.
      Fig 2: Measuring Resistance Between ABS Module C135 Pin 8, Circuit 530 (LG/YE), Harness Side And Ground
      G03904915Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new hydraulic control unit (HCU). REFER to HYDRAULIC CONTROL UNIT (HCU) . Clear the DTC's. CARRY OUT the self-test.
    • No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  6. H7 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Check ABS module C155 for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: ABS Module C155
    • Make sure the connector is fully seated and locked, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new ABS module and hydraulic control unit (HCU). REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . Using the scan tool, CARRY OUT the IVD (ESC) initialization sequence. CLEAR the DTCs. CARRY OUT the self-test with the brake pedal not applied.

      It DTC C1095 or C1096 returns, INSTALL a new hydraulic control unit (HCU). REFER to HYDRAULIC CONTROL UNIT (HCU) . Clear the DTC's. CARRY OUT 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 or a malfunctioning charging system. CLEAR the DTCs. CARRY OUT the self-test with the brake pedal not applied.
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