Pinpoint Test E: DTCS C1095 And C1096 - Abs Hydraulic Pump Motor Circuit Failure/Open

Test Step 

1. E1 CHECK THE ABS PUMP MOTOR 
   • Key in ON position.
   • Is the pump motor on constantly? 

   Result / Action to Take 

   1. Yes  : GO to E4.
   2. No  : GO to E2.
2. E2 CHECK CIRCUIT 534 (YE/LG) FOR AN OPEN 
   • Key in OFF position.
   • Disconnect: ABS Module C135.
   • Key in ON position.
   • Measure the voltage between the ABS module C135 pin 28, circuit 534 (YE/LG), harness side and ground.
     Fig 1: Measuring Voltage Between ABS Module C135 Pin 28, Circuit 534 (YE/LG), Harness Side And Ground

     Courtesy of FORD MOTOR CO.
   • Is the voltage between 9 volts and 19 volts? 
   1. Yes  : GO to E3.
   2. No  : REPAIR the circuit. TEST the system for normal operation.
3. E3 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
   • Key in OFF position.
   • Measure the resistance between the ABS module C135 pin 18, circuit 57 (BK), harness side and ground.
     Fig 2: Measuring Resistance Between ABS Module C135 Pin 18, Circuit 57 (BK), Harness Side And Ground

     Courtesy of FORD MOTOR CO.
   • Is the resistance less than 5 ohms? 
   1. Yes  : GO to E4.
   2. No  : REPAIR the circuit. TEST the system for normal operation.
4. E4 CHECK FOR CORRECT ABS MODULE OPERATION 
   • Disconnect all ABS connectors.
   • Check for:
     • corrosion
     • pushed-out pins
   • Connect all ABS connectors and make sure they seat correctly.
   • Operate the system and verify the concern is still present.
   • Is the concern still present? 
   1. Yes  : GO to E5.
   2. No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test with the brake pedal not applied.
5. E5 CHECK THE ABS PUMP MOTOR FOR CORRECT OPERATION 
   • Key in OFF position.
   • Remove the ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
   • Connect a fused (50A) jumper wire between the positive battery terminal and the pump motor positive terminal (insulated from the hydraulic control unit (HCU) body) on the HCU. Connect a jumper wire between the negative battery terminal and the pump motor negative terminal (attached to the HCU body) on the HCU.
     Fig 3: Connecting Fused (50A) Jumper Wire Between Battery Terminal And Pump Motor

     Courtesy of FORD MOTOR CO.
   • Is the ABS pump motor operating? 
   1. Yes  : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . After the repairs, CARRY OUT the self-test with the brake pedal not applied.
   2. No  : INSTALL a new HCU assembly. REFER to HYDRAULIC CONTROL UNIT . After the repairs, CARRY OUT the self-test with the brake pedal not applied.