Normal Operation and Fault Conditions

With the ignition ON, the PSCM sends messages to the ABS module over the HS-CAN2. If the ABS module does not receive these messages within a certain time frame, the ABS module sets a DTC. For information on the messages sent to the ABS module by the PSCM, refer to the Network Message Chart in Description and Operation in ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL (EXCEPT HYBRID) .

PPT AE ABS MODULE DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
U0131:00	Lost Communication With Power Steering Control Module: No Sub Type Information	Sets when the ABS module detects any of the steering wheel data messages is missing from the PSCM. This can be due to a PSCM failure, a circuit failure on the HS-CAN or an excessive load on the network.

Possible Causes

Network communication concern
PSCM
ABS module

Fig 1: Antilock Braking System (ABS) Module Connector - C135
Courtesy of FORD MOTOR COMPANY

Harness Side

Fig 2: Gateway Module A (GWM) Connector - C2431
Courtesy of FORD MOTOR CO.

Harness Side

Fig 3: PSCM-A (-A) Connector - C1463A
Courtesy of FORD MOTOR CO.

Harness Side

Fig 4: PSCM-B (-B) Connector - C1463B
Courtesy of FORD MOTOR CO.

Harness Side

AE1: CHECK THE COMMUNICATION NETWORK

Ignition ON, engine OFF.
Press the Read Vehicle Information button to view the results of the modules communicating on the network.
Retrieve the continuous memory DTCs.

Does the PSCM pass the Network Test?

Yes	No
Go to AE2.	DIAGNOSE the PSCM does not communicate with the diagnostic scan tool. REFER to MODULE COMMUNICATIONS NETWORK (EXCEPT HYBRID) .

AE2: RECHECK THE ABS MODULE DTCS

Clear the ABS DTCs.
Ignition OFF.
Ignition ON, engine OFF.
Carry out the ABS self-test.

Is DTC U0131:xx or U0420:xx retrieved again?

Yes	No
Go to AE3.	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

AE3: CHECK FOR ABS MODULE VOLTAGE CONCERN DTCS

Review the results from the recorded ABS module self-test.

Is DTC U3003:16 or U3003:17 present?

Yes	No
For DTC U3003:16, Go to PINPOINT TEST A . For DTC U3003:17, Go to PINPOINT TEST F .	Go to AE4.

AE4: CHECK THE PSCM FOR DTCS

Carry out the PSCM self-test.

Are any PSCM DTCs present?

Yes	No
DIAGNOSE the PSCM DTC. REFER to POWER STEERING SYSTEM (EXCEPT HYBRID) .	Go to AE5.

AE5: CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

NOTE: If new modules were installed prior to the DTC being set, the module configuration can be incorrectly set during the PMI or the PMI may not have been carried out.

Check the vehicle service history for recent service actions related to the PSCM or the ABS module. If recent service history is found:
- Verify the correct replacement module was installed. HVBOM may be used to verify correct part fitment.
- Verify the configuration of replacement module was correct. Re-configure the module using as-built data if prior configuration is suspect.
- Verify the module was not obtained from a like vehicle and installed into customer vehicle. Return the swapped module to source vehicle and obtain new replacement module.
Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?

Yes	No
Go to AE6.	The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

AE6: CHECK FOR COMMUNICATION DTCS IN OTHER MODULES

Ignition ON, engine OFF.
Retrieve the continuous memory DTCs.

Is DTC U0131:xx or U0420:xx set in 1 or more modules in addition to the ABS module?

Yes	No
Go to AE7.	Go to AE8.

AE7: VERIFY PSCM OPERATION

Ignition OFF.
PSCM_A connector disconnected. (C1463A)
PSCM_B connector disconnected. (C1463B)
GWM connector disconnected. (C2431)
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
ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
GWM connector connected. (C2431) Make sure the connector seats and latches correctly.
PSCM_B connector connected. (C1463B) Make sure the connector seats and latches correctly.
PSCM_A connector connected. (C1463A) Make sure the connector seats and latches correctly.
Operate the system and verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new EPAS gear. CHECK OASIS for any applicable 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 EPAS gear. REFER to POWER STEERING SYSTEM (EXCEPT HYBRID) . ORDER a replacement EPAS gear 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.	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.

Yes

INSTALL a new EPAS gear.
CHECK OASIS for any applicable 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 EPAS gear. REFER to POWER STEERING SYSTEM (EXCEPT HYBRID) .
ORDER a replacement EPAS gear 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.

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.

AE8: VERIFY ABS MODULE OPERATION

Ignition OFF.
ABS Module connector disconnected. (C135)
GWM connector disconnected. (C2431)
PSCM_A connector disconnected. (C1463A)
PSCM_B connector disconnected. (C1463B)
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
PSCM_B connector connected. (C1463B) Make sure the connector seats and latches correctly.
PSCM_A connector connected. (C1463A) Make sure the connector seats and latches correctly.
GWM connector connected. (C2431) Make sure the connector seats and latches correctly.
ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
Operate the system and verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new ABS module. CHECK OASIS for any applicable 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 ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL (EXCEPT HYBRID) . 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.	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.

Yes

INSTALL a new ABS module.
CHECK OASIS for any applicable 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 ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL (EXCEPT HYBRID) .
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.

AE9: VERIFY ABS MODULE OPERATION

Ignition OFF.
NOTE: The battery must be removed to access the ABS module electrical connector.
Remove the battery. Refer to the appropriate procedure in CHARGING SYSTEM (BATTERY, MOUNTING AND CABLES) (EXCEPT HYBRID) .
ABS Module connector disconnected. (C135)
GWM connector disconnected. (C2431)
PSCM_A connector disconnected. (C1463A)
PSCM_B connector disconnected. (C1463B)
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
PSCM_B connector connected. (C1463B) Make sure the connector seats and latches correctly.
PSCM_A connector connected. (C1463A) Make sure the connector seats and latches correctly.
GWM connector connected. (C2431) Make sure the connector seats and latches correctly.
ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
Install the battery. Refer to the appropriate procedure in CHARGING SYSTEM (BATTERY, MOUNTING AND CABLES) (EXCEPT HYBRID) .
Operate the system and verify the concern is still present.

Is the concern still present?

Yes	No
INSTALL a new ABS module. CHECK OASIS for any applicable 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 ABS module and HCU assembly. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL (EXCEPT HYBRID) . ORDER a replacement and HCU assembly 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.	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.

Yes

INSTALL a new ABS module.
CHECK OASIS for any applicable 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 ABS module and HCU assembly. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL (EXCEPT HYBRID) .
ORDER a replacement and HCU assembly 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.