LEMON Manuals: Even more car manuals for everyone
Home >> Lincoln >> 2012 >> MKZ Hybrid >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brake System And Stability Control >> Diagnosis And Testing >> Anti-Lock Control - Hybrid >> Pinpoint Tests >> Pinpoint Test N: DTCs C0020:13 and 71 >> PINPOINT TEST N: DTCs C0020:13 AND 71

PINPOINT TEST N: DTCs C0020:13 AND 71

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. N1 VERIFY ALL WIRING CONNECTIONS 
    • Disconnect: ABS Module C135.
    • Using a good light source, inspect each connector terminal for any corrosion.
    • Inspect both connectors for any pushed-out pins. Refer to CONNECTOR REPAIR PROCEDURES for schematic and connector information.
    • Using a suitable mating terminal, check each female terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
      • C135-1
      • C135-47
        Fig 1: Identifying ABS Module Connector Wiring
        G06257083Courtesy of FORD MOTOR CO.
    • Refer to CONNECTOR REPAIR PROCEDURES for schematic and connector information.
    • Is each terminal free of corrosion, pushed-out pins or spread terminals? 
      • Yes:  GO to N2.
      • No:  REPAIR the affected terminal(s). CLEAR the DTCs. REPEAT the self-test.
  2. N2 CHECK THE PUMP MOTOR (PMP_MTR) ACTIVE COMMAND 
    • Connect: ABS Module C135.
    • Connect the scan tool.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: DataLogger - ABS Module.
    • Toggle the PMP_MTR active command ON.
    • Does the ABS pump motor run for approximately 4 seconds? 
      • Yes:  TOGGLE the PMP_MTR active command OFF. CLEAR the DTCs. DRIVE the vehicle at speeds greater than 20 km/h (12 mph). RETRIEVE the DTCs. If DTCs C0020:13 or 71 are retrieved, GO to  N5. For all other ABS module DTCs, GO to the ABS Module DTC Chart  .
      • No:  TOGGLE the ABS module PMP_MTR active command OFF. GO to N3.
  3. N3 CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS MODULE 
    • Ignition OFF.
    • Disconnect: ABS Module C135.
    • Ignition ON.
    • Measure the voltage between ABS module C135-1, circuit SBB08 (VT/RD), harness side and ground.
      Fig 2: Measuring Voltage Between ABS Module C135-1, Circuit SBB08 (VT/RD) And Ground
      G06094495Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      • Yes:  GO to N4.
      • No:  VERIFY that BJB fuse 8 (50A) is OK. If OK, REPAIR circuit SBB08 (VT/RD).

        If the fuse is not OK, REFER to the Wiring Diagrams information to identify the cause of the circuit short.

        CLEAR the DTCs and REPEAT the self-test.

  4. N4 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between ABS module C135-47, circuit GD121 (BK/YE), harness side and ground.
      Fig 3: Measuring Resistance Between ABS Module C135-47, Circuit GD121 (BK/YE) And Ground
      G06257085Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes:  GO to N5.
      • No:  REPAIR circuit GD121 (BK/YE). CLEAR the DTCs. REPEAT the self-test.
  5. N5 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect: ABS Module C135.
    • Check for:
      • corrosion
      • pushed-out pins
      • spread terminals
    • Connect: ABS Module C135.
    • Make sure the connector is seated correctly, then operate the system and verify the concern is still present.
    • Is the concern is still present? 
      • Yes:  INSTALL a new HCU and ABS module. REFER to HYDRAULIC CONTROL UNIT (HCU) - HYBRID  .
      • 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.
scientia non olet · About LEMON Manuals