Pinpoint Test Ai: Abs Module Communication Concern With Pcm

Normal Operation and Fault Conditions

With the ignition ON, the PCM sends messages to the ABS module over the FD-CAN. If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC. This can be due to a PCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the PCM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .

The TCM is an internal component of the PCM.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
ABS C0011:37	Left Front Outlet Control: Signal Frequency Too High	This DTC sets when the when the reverse gear message sent from the PCM indicates the transmission is in REVERSE when other stability control inputs received by the ABS module indicate the vehicle is moving forward.
ABS U0100:00	Lost Communication With ECM/PCM 'A': No Sub Type Information	This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time.
ABS U0100:87	Lost Communication With ECM/PCM 'A': Missing Message	This DTC sets when the ABS module does not receive any engine brake messages from the PCM within the allowed time.
ABS U0101:00	Lost Communication with TCM: No Sub Type Information	This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time.
ABS U0101:87	Lost Communication with TCM: Missing Message	This DTC sets when the ABS module does not receive any powertrain data messages from the PCM within the allowed time.
ABS U0401:64	Invalid Data Received from ECM/PCM A: Signal Plausibility Failure	This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U0401:86	Invalid Data Received from ECM/PCM A: Signal Invalid	This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U0402:82	Invalid Data Received from TCM: Alive/Sequence Counter Incorrect/Not Updated	This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U0402:83	Invalid Data Received from TCM: Value Of Signal Protection Calculation Incorrect	This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U0402:86	Invalid Data Received from TCM: Signal Invalid	This DTC sets when the ABS module receives messages but the messages contain invalid data.

Possible Causes

Network communication concern
PCM

AI1 CHECK THE PCM (POWERTRAIN CONTROL MODULE) COMMUNICATION

Ignition ON.

Press the Read Vehicle Information button to view the results of the modules communicating on the network.

Press Read Vehicle Information button to retrieve DTC's from the vehicle.
NOTE: DTC's may be displayed from previous diagnostic actions.

Read vehicle information.

Does the PCM pass the Network Test?

Yes	RETRIEVE and RECORD all PCM DTC's. REFER to: Electronic Engine Controls (303-14 Electronic Engine Controls). REFER to: Powertrain Control Module (PCM) Input and Output Controls (303-14 Electronic Engine Controls). REFER to: ELECTRIC POWERTRAIN CONTROL . If there are no DTC's in the PCM. GO to AI3

No	DIAGNOSE the PCM does not communicate with the diagnostic scan tool. REFER to: Communications Network in the appropriate Module Communications Network article. GO to AI2

AI2 CHECK THE GWM (GATEWAY MODULE A) COMMUNICATION

Review the results of the modules communicating on the network from the previous step.

Did the GWM pass the Network Test?

Yes	DIAGNOSE the PCM does not communicate with the diagnostic scan tool. REFER to: Communications Network in the appropriate Module Communications Network article.

No	DIAGNOSE the scan tool does not communicate with the GWM. REFER to: Communications Network in the appropriate Module Communications Network article.

AI3 RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE FOR THE LOST COMMUNICATION DTC (DIAGNOSTIC TROUBLE CODE)

NOTE: When retrieving DTCs, ignore all historical or continuous memory DTC's.

Clear the ABS module DTC's.

Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool.
- Open the door, exit the vehicle and close the door.
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode

Ignition ON.

Carry out the ABS module DTC's.

Are any of the DTC's listed in the DTC Fault Trigger Conditions table present and active in the ABS module?

Yes

GO to AI4

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

AI4 REVIEW THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST FOR VOLTAGE-REALTED DTCS
- Review the results from the ABS module self-test.
Is DTC U3003:16 or U3003:17 present?

Yes For DTC U3003:16: GO to Pinpoint Test A For DTC U3003:17: GO to Pinpoint Test F

No GO to AI5

AI5 CHECK FOR GWM (GATEWAY MODULE A) DTCS
- Carry out the GWM DTC's.
Are any DTC's present?

Yes DIAGNOSE the GWM DTC. REFER to: Communications Network in the appropriate Module Communications Network article.

No GO to AI6

AI6 CHECK FOR PCM (POWERTRAIN CONTROL MODULE) DTCS

Carry out the PCMKOEO self-test.

Are any DTC's present?

Yes	DIAGNOSE the PCM DTC. REFER to: Powertrain Control Module (PCM) Input and Output Controls . REFER to: Powertrain Control Module (PCM) Input and Output Controls . REFER to: Powertrain Control Module (PCM) Input and Output Controls .

GO to AI7

AI7 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 PCM 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

GO to AI8

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

AI8 CHECK FOR COMMUNICATION DTCS IN OTHER MODULES
- Ignition ON.
- Press Read Vehicle Information button to retrieve DTC's from the vehicle.
  NOTE: DTC's may be displayed from previous diagnostic actions.
- Read the vehicle information.
Is any DTC from the Fault Trigger Conditions Table set in 1 or more modules in addition to the ABS module?

Yes GO to AI9

No GO to AI10

AI9 VERIFY PCM (POWERTRAIN CONTROL MODULE) OPERATION

Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool
- Open the door, exit the vehicle and close the door
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode

Disconnect ABS module connector C135.

Disconnect PCM module connector C175B for 1.5L EcoBoost engine.

Disconnect PCM module connector C1551B for 2.0L EcoBoost engine.

Disconnect PCM connector C1381B for 2.5L HEV.

Disconnect SOBDMC connector C199A for HEV vehicle (If equipped).

Disconnect GWM connector C2431.

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

Connect PCM module connector C175B for 1.5L EcoBoost engine. Make sure the connector seats and latches correctly.

Connect PCM module connector C1551B for 2.0L EcoBoost engine. Make sure the connector seats and latches correctly.

Connect SCBDMCSOBDMC module connector C1381B for 2.5L HEV. Make sure the connector seats and latches correctly.

Connect SOBDMC connector C199A for HEV vehicle (If equipped). Make sure the connector seats and latches correctly.

Connect GWM connector C2431. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

For Hybrid Electric Vehicle: 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 SOBDMC. REFER to: INVERTER SYSTEM CONTROLLER [SOBDMC] . Generate RVC. For all others: 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 PCM. REFER to: Powertrain Control Module (PCM) Input and Output Controls .
INSTALL a new Powertrain Control Module (PCM). only available in the on-line service information RVC:
Generate RVC only works in single-step view Generate RVC requires VIN entry REFER to: Powertrain Control Module (PCM) Input and Output Controls .
INSTALL a new Powertrain Control Module (PCM). Only available in the on-line service information RVC:
Generate RVC only works in single-step view Generate RVC requires VIN entry REFER to: Powertrain Control Module (PCM) Input and Output Controls .
INSTALL a new Powertrain Control Module (PCM). Only available in the on-line service information RVC:
Generate RVC only works in single-step view Generate RVC requires VIN entry

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.

AI10 VERIFY ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION

Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool
- Open the door, exit the vehicle and close the door
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode

Disconnect ABS connector C135.

Disconnect PCM module connector C175B for 1.5L EcoBoost engine.

Disconnect PCM module connector C1551B for 2.0L EcoBoost engine.

Disconnect PCM connector C1381B for 2.5L HEV.

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

Connect ABS connector C135. Make sure the connector seats and latches correctly.

Connect PCM module connector C175B for 1.5L EcoBoost engine. Make sure the connector seats and latches correctly.

Connect PCM module connector C1551B for 2.0L EcoBoost engine. Make sure the connector seats and latches correctly.

Connect SCBDMCSOBDMC module connector C1381B for 2.5L HEV. Make sure the connector seats and latches correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

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 EBB unit (HCU and ABS module assembly). REFER to: Electric Brake Booster (EBB) .

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.