Visual Inspection and Diagnostic Pre-checks

Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
Make sure the vehicle battery terminals are tightened to their correct torque specifications.

Make sure BJB fuse 87 (60A) and the fuse socket are OK.

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

Fig 1: Antilock Braking System (ABS) Module Connector - C135

Courtesy of FORD MOTOR COMPANY

CONNECTOR PIN REFERENCE (HARNESS SIDE)

Circuit	Pin
Motor B+ (Battery Voltage HCU Motor) - SBB87	1 (YELLOW/RED)
GND (Ground) - GD121	14 (BLACK/YELLOW)

H1: CHECK THE VEHICLE BATTERY AND CHARGING SYSTEM

Verify the vehicle battery and charging system are operating correctly. Refer to Charging System - General Information (Hybrid/Energi) .

Are the battery and charging system operating correctly?

Yes	No
Go to H2.	FOLLOW the diagnostic repair directions as instructed. Refer to: Charging System - General Information (Hybrid/Energi) ,

H2: VERIFY ALL WIRING CONNECTIONS

Ignition OFF.
ABS Module connector disconnected. (C135)
Using a good light source, inspect all disconnected electrical connectors for the following:
- corrosion - install new connector or terminal and clean the module pins
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
- spread terminals - install new terminals as necessary
Using a suitable mating terminal, check each connector terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
- C135-1
- C135-14

Is connector free of terminal corrosion, pushed-out terminals and spread terminals?

Yes	No
Go to H3.	REPAIR the affected terminal. Refer to OEM Connector Repair Procedures (Hybrid/Energi) .

H3: CHECK PUMP MOTOR OPERATION

Connect the ABS module electrical connector.
Ignition ON, engine OFF.
Access the ABS and control the PMP_MTR (MODE) PID.
Command the pump motor on and listen for the ABS pump motor to activate.

Does the ABS pump motor run for approximately 2 seconds when commanded on?

Yes	No
Go to H4.	Go to H5.

H4: CHECK FOR FAULT REPEATABILITY

Clear the ABS DTCs.
Ignition OFF.
Ignition ON, engine OFF.
Test drive the vehicle at speeds greater than 20 km/h (12 mph).
Ignition OFF.
Ignition ON, engine OFF.
Carry out the ABS self-test.

Is DTC C0020:71 or C1B02:71 present?

Yes	No
Go to H7.	For all other C0020:xx and C1B02:xx DTCs, Go to H5. For all other DTCs, No fault found. Go to the ABS Module DTC Chart. Refer to: DTC Chart: Anti-Lock Brake System (ABS) Module If there are no DTCs present, No fault found. The concern causing the DTC is not present at this time. DISCONNECT and INSPECT the ABS module electrical connector. CLEAN or REPAIR the connector as necessary. ADDRESS the root cause of any connector or pin issues.

Yes

Go to H7.

For all other C0020:xx and C1B02:xx DTCs, Go to H5.
For all other DTCs,
No fault found.
Go to the ABS Module DTC Chart. Refer to: DTC Chart: Anti-Lock Brake System (ABS) Module
If there are no DTCs present,
No fault found.
The concern causing the DTC is not present at this time. DISCONNECT and INSPECT the ABS module electrical connector. CLEAN or REPAIR the connector as necessary. ADDRESS the root cause of any connector or pin issues.

H5: CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS MODULE

Ignition OFF.
NOTE: VERIFY BJB fuse 87 (60A) is OK. If not OK, REFER to OEM Electrical Wiring Diagram Introduction (Hybrid/Energi) .
Disconnect the ABS module electrical connector.

Measure the voltage between:

(+) ABS Module (C135) Connector, Harness Side	(-)
Motor B+ - SBB87 (YELLOW/RED) - Pin 1	Ground

Is the voltage greater than 11 volts?

Yes	No
Go to H6.	REPAIR the circuit.

H6: CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN

Disconnect the battery negative cable. Refer to Charging System - General Information (Hybrid/Energi) .

Measure the resistance between:

(+) ABS Module (C135) Connector, Harness Side	(-)
GND - GD121 (BLACK/YELLOW) - Pin 14	Ground

Is the resistance less than 3 ohms?

Yes	No
Go to H7.	REPAIR the circuit.

H7: VERIFY ALL WIRING CONNECTIONS

Ignition OFF.
ABS Module connector disconnected. (C135)
Using a good light source, inspect all disconnected electrical connectors for the following:
- corrosion - install new connector or terminal and clean the module pins.
- damaged or bent pins - install new terminals or pins.
- pushed-out pins - install new pins as necessary.
- spread terminals - install new terminals as necessary.

Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals?

Yes	No
Go to H8.	REPAIR the connector or terminals. Refer to OEM Connector Repair Procedures (Hybrid/Energi) .

H8: CHECK FOR CORRECT HCU OPERATION

ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
Connect the negative battery cable. Refer to Charging System - General Information (Hybrid/Energi) .
Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new HCU. CHECK OASIS for any service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new HCU. REFER to Anti-Lock Brake System (ABS) And Stability Control (Hybrid/Energi) . ORDER a replacement HCU and INCLUDE the RVC on the form. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.	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. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

Yes

INSTALL a new HCU.
CHECK OASIS for any service
articles: TSB, GSB, SSM or FSA.
If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
If no service articles address this concern, INSTALL a new HCU. REFER to Anti-Lock Brake System (ABS) And Stability Control (Hybrid/Energi) .
ORDER a replacement HCU and INCLUDE the RVC on the form.
If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

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.
If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

H9: CHECK FOR CORRECT ABS MODULE AND HCU OPERATION

ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
Connect the negative battery cable. Refer to Charging System (Battery, Battery Mounting And Battery Cables) (Hybrid/Energi) .
Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new ABS module. CHECK OASIS for any service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service actions address this concern, INSTALL a new HCU and ABS module assembly. REFER to Anti-Lock Brake System (ABS) And Stability Control (Hybrid/Energi) . ORDER a replacement HCU and ABS module assembly and INCLUDE the RVC on the form. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.	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. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

Yes

INSTALL a new ABS module.
CHECK OASIS for any service
articles: TSB, GSB, SSM or FSA.
If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
If no service actions address this concern, INSTALL a new HCU and ABS module assembly. REFER to Anti-Lock Brake System (ABS) And Stability Control (Hybrid/Energi) .
ORDER a replacement HCU and ABS module assembly and INCLUDE the RVC on the form.
If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

H10: CHECK FOR CORRECT ABS MODULE OPERATION

ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
Connect the negative battery cable. Refer to Charging System (Battery, Battery Mounting And Battery Cables) (Hybrid/Energi) .
Operate the system and determine if the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new ABS module. CHECK OASIS for any service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service actions address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) And Stability Control (Hybrid/Energi) . ORDER a replacement ABS module and INCLUDE the RVC on the form. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.	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. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.

Yes

INSTALL a new ABS module.
CHECK OASIS for any service
articles: TSB, GSB, SSM or FSA.
If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
If no service actions address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) And Stability Control (Hybrid/Energi) .
ORDER a replacement ABS module and INCLUDE the RVC on the form.
If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.
When complete, SELECT the "X" in the top right corner to CLOSE this procedure and RETURN to the PTS web site.