Pinpoint Test BQ: Abs Module Communication Concern With IPMA

Normal Operation and Fault Conditions

With the ignition ON, the IPMA 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 IPMA 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 IPMA, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
ABS U023A:00	Lost Communication With Image Processing Module A: No Sub Type Information	This DTC sets when the ABS module does not receive any messages from the IPMA within the allowed time.
ABS U023A:87	Lost Communication With Image Processing Module A: Missing Message	Sets when the parking aid messages from the IPMA contain invalid or faulty information.
ABS U053B:82	Invalid Data Received From Image Processing Module A: Alive/Sequence Counter Incorrect/Not Updated	This DTC sets when the ABS module receives messages but the messages contain invalid data.
ABS U053B:83	Invalid Data Received From Image Processing Module A: Value Of Signal Protection Calculation Incorrect	This DTC sets when the ABS module receives messages but the messages contain invalid data.

Possible Causes

Network communication concern
IPMA

BQ1 CHECK THE COMMUNICATION NETWORK

Ignition ON.

Using a diagnostic scan tool, carry out the Network Test.

Does the IPMA pass the network Test?

Yes	RETRIEVE and RECORD all IPMA DTC's. REFER to: DIAGNOSTIC TROUBLE CODE (DTC) CHART . If there are no DTC's in the IPMA, GO to BQ2

No	DIAGNOSE the no communication with the IPMA. REFER to: Communications Network in the appropriate Module Communications Network article.

BQ2 RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DTCS

Clear the ABS 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 self-test.

Retrieve and record the ABS module DTC's.

Do any of the DTC's listed in the DTC Fault Trigger Conditions table return?

Yes

GO to BQ3

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.

BQ3 REVIEW THE RECORDED DTCS FROM THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST
- Review the recorded DTC's from the ABS module self-test.
Is DTC U3003:16 or U3003:17 recorded?

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

No GO to BQ4

BQ4 CHECK FOR DTCS IN THE IPMA (IMAGE PROCESSING MODULE A)
- Carry out the IPMA self-test.
Are any DTC's present in the IPMA '

Yes DIAGNOSE the IPMA DTC's. REFER to: DIAGNOSTIC TROUBLE CODE (DTC) CHART .

No GO to BQ5

BQ5 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 IPMA or 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 BQ6

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

BQ6 CHECK FOR COMMUNICATION DTCS SET IN OTHER MODULES
- Press Read Vehicle Information button to retrieve DTC's from the vehicle.
  NOTE: DTCs may be displayed from previous diagnostic actions.
- Read vehicle information.
Is DTCs U023A:xx, U0265:xx or U053B:xx set in 1 or more modules in addition to the ABS module?

Yes GO to BQ7

No GO to BQ8

BQ7 CHECK FOR CORRECT IPMA (IMAGE PROCESSING MODULE A) 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 IPMA connector C9039.

Disconnect ABS module connector 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

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

Connect IPMA module connector C9039. 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 services articles address this concern, INSTALL a new IPMA. REFER to: IMAGE PROCESSING MODULE A (IPMA) .

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.

BQ8 CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) 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. Make sure the connector seats and latches correctly.

Disconnect IPMA connector C9039.

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 IPMA module connector C9039. Make sure the connector seats and latches correctly.

Connect ABS module connector C135. 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 no service articles address this concern, INSTALL a new EBB unit. REFER to: Electric Brake Booster (EBB) . REFER to: Electric Brake Booster (EBB) - Full Hybrid Electric Vehicle (FHEV)/Plug-In Hybrid Electric Vehicle (PHEV) .

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.