Pinpoint Test C: C0020:16, 17 And 49

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

C1 CHECK THE ABS MODULE PUMP MOTOR (PMP_MOTOR) ACTIVE COMMAND
- Ignition ON.
- Using a scan tool, toggle the PMP_MOTOR active command ON and listen for the ABS pump motor noise.
Does the ABS pump motor run for approximately 2 seconds?
- Yes : TOGGLE the PMP_MOTOR active command OFF. GO to C2 .
- No : TOGGLE the PMP_MOTOR active command OFF. GO to C3.
C2 CHECK FOR FAULT REPEATABILITY
- Using a scan tool, clear the ABS module DTCs.
- Drive the vehicle at speeds greater than 20 km/h (12 mph).
- Bring the vehicle to a safe stop.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
Are DTCs C0020:16, 17 or 49 present?
- Yes : GO to C3 .
- No : For all other DTCs, REFER to the ABS MODULE DTC CHART .
  If no DTCs are present, the system is operating correctly at this time.
C3 CHECK THE ABS MODULE GROUND EYELET AT THE CHASSIS
- Ignition OFF.
- Remove the bolt retaining the ABS module ground to the vehicle.
  Refer to VEHICLE DYNAMIC SYSTEMS for schematic and connector information.
- Clean the body mating surface and ground eyelets.
- Position the ground eyelets and install the bolt.
- Ignition ON.
- Using a scan tool, clear the ABS module DTCs.
- Drive the vehicle at speeds greater than 20 km/h (12 mph).
- Bring the vehicle to a safe stop.
- Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
Are DTCs C0020:16, 17 or 49 present?
- Yes : GO to C4 .
- No : If no DTCs are present, the concern was most likely caused by a loose or corroded connector.
  For all other DTCs, REFER to the ABS MODULE DTC CHART .

C4 CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS MODULE

Ignition OFF.
Disconnect: ABS Module C135 .

Measure the voltage between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-1	SBB05 (GY/RD)	-	Ground

Fig 1: Identifying ABS Module Connector Terminals (C135)

Courtesy of FORD MOTOR CO.

Is the voltage greater than 11 volts?

Yes : GO to C5 .
No : VERIFY that BJB fuse 5 (50A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the OEM WIRING DIAGRAMS to identify the cause of the circuit short.

C5 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN

Disconnect the battery negative cable. Refer to BATTERY, MOUNTING AND CABLES .

Measure the resistance between:

Positive Lead		Negative Lead
Pin	Circuit	Pin	Circuit
C135-13	GD120 (BK/GN)	-	Ground

Fig 2: Identifying ABS Module Connector Terminals (C135)

Courtesy of FORD MOTOR CO.

Is the resistance less than 3 ohms?

Yes : GO to C6 .
No : REPAIR the circuit.

C6 CHECK FOR CORRECT ABS MODULE OPERATION
- Inspect the ABS module electrical connector.
- Repair:
  - corrosion (install new connector or terminal - clean module pins)
  - damaged or bent pins - install new terminals/pins
  - pushed-out pins - install new pins as necessary
- Connect the battery negative cable. Refer to BATTERY, MOUNTING AND CABLES .
- Connect: ABS Module C135 .
- Make sure the connector seats and latches correctly, then operate the system and determine if the concern is still present.
Is the concern still present?
- Yes : CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.
  If no TSBs address this concern, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.