PINPOINT TEST J: DTCs C0020:13 AND 71

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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.

J1 VERIFY ALL WIRING CONNECTIONS
- Ignition OFF.
- Disconnect: ABS Module C155.
- Using a good light source, inspect each connector terminal for any corrosion.
- Inspect both connectors for any pushed-out pins.
  Refer to appropriate SYSTEM WIRING DIAGRAMS article 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:
  - C155-1
  - C155-16
    
    Fig 1: Identifying ABS Module C155 Connector Pins
    Courtesy of FORD MOTOR CO.
- Refer to appropriate SYSTEM WIRING DIAGRAMS article for schematic and connector information.
- Is each terminal free of corrosion, pushed-out pins or spread terminals?
1. Yes: GO to J2 .
2. No: REPAIR the affected terminal(s). CLEAR the DTCs. REPEAT the self-test.
J2 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 2 seconds?
1. 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 DTC C0020:13 or 71 is retrieved, GO to J5. For all other ABS module DTCs, GO to the ABS MODULE DTC CHART .
2. No: TOGGLE the ABS module pump motor OFF active command. GO to J3 .
J3 CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS MODULE
- Ignition OFF.
- Disconnect: ABS Module C155.
- Ignition ON.
- Measure the voltage between ABS module C155-1, circuit SBB09 (RD), harness side and ground.
  
  Fig 2: Measuring Voltage Between ABS Module C155-1 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. Yes: GO to J4 .
2. No: VERIFY that BJB fuse 9 (50A) is OK. If OK, REPAIR circuit SBB09 (RD).
  If the fuse is not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the cause of the circuit short.
  
  CLEAR the DTCs and REPEAT the self-test.
J4 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Measure the resistance between ABS module C155-16, circuit GD120 (BK/GN), harness side and ground.
  
  Fig 3: Measuring Resistance Between ABS Module C155-16 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes: GO to J5 .
2. No: REPAIR circuit GD120 (BK/GN). CLEAR the DTCs. REPEAT the self-test.
J5 CHECK FOR CORRECT ABS MODULE OPERATION
- Disconnect: ABS Module C155 (if not previously disconnected).
- Check ABS module C135 for:
  - corrosion.
  - pushed-out pins.
  - spread terminals.
- Connect: ABS Module C155.
- Make sure the connector is seated correctly, 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 . TEST the system for normal operation.
  CLEAR the DTCs. DRIVE the vehicle at speeds greater than 20 km/h (12 mph). REPEAT the self-test. If DTC C0020:13 or 71 returns, INSTALL a new HCU . REFER to HYDRAULIC CONTROL UNIT (HCU) - HYBRID .
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. REPEAT the self-test.