PINPOINT TEST N: DTCs C0020:13 AND 71

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. 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 multimeter probes.

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 the 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:
  - C135-1
  - C135-47
  Fig 1: Identifying C135 Connector Terminals
  Courtesy of FORD MOTOR CO.
- Refer to the appropriate SYSTEM WIRING DIAGRAMS article 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.
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 ABS MODULE DTC TABLE .
- No: TOGGLE the ABS module PMP_MTR active command OFF. GO to N3.
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 & Ground
  Courtesy 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 appropriate SYSTEM WIRING DIAGRAMS article to identify the cause of the circuit short.
  
  CLEAR the DTCs and REPEAT the self-test.
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 & Ground
  Courtesy 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.
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 still present?
- Yes: INSTALL a new ABS module. REFER to Removal and Installation . 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 C0020:13 or 71 returns, INSTALL a new HCU. REFER to Removal and Installation .
- 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.