Pinpoint Tests CN: Abs Module Communication Concern With Sima
- CN1: 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 DLCM pass the Network Test?
Yes No Go to CN2. DIAGNOSE the SIMA does not communicate with the diagnostic scan tool. REFER to Module Communications Network article. - CN2: RECHECK THE ABS MODULE DTCS
- Clear the ABS DTCs.
- 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, engine OFF. Carry out the ABS self-test.
- Is DTC U011 B7:00 retrieved again?
Yes No Go to CN3. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. - CN3: 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 CN4. - CN4: 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 DLCM 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 CN5. The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration. - Check the vehicle service history for recent service actions related to the DLCM or the ABS module. If recent service history is found:
- CN5: CHECK FOR COMMUNICATION DTCS IN OTHER MODULES
- Ignition ON, engine OFF.
- Retrieve the continuous memory DTCs.
- Is DTC U01B7:xx set in 1 or more modules in addition to the ABS module?
Yes No Go to CN6. Go to CN7. - CN6: VERIFY DLCM 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.
- DLCM connector disconnected.
- ABS Module connector disconnected.
- 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. Make sure the connector seats and latches correctly.
- DLCM connector connected. 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 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 DLCM. REFER to Instrumentation, Message Center and Warning Chimes article.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. - Put the ABS module in sleep mode by performing the following steps:
- CN7: VERIFY ABS 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.
- DLCM connector disconnected.
- ABS Module connector disconnected.
- 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. Make sure the connector seats and latches correctly.
- DLCM connector connected. 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 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.
For vacuum brake booster equipped vehicles, if no service articles address this concern, INSTALL a new HCU and ABS module assembly. REFER to Anti-Lock Brake System (ABS) and Stability Control article.
For electric brake booster equipped vehicles, if no service articles address this concern, INSTALL a new EBB unit. REFER to Anti-Lock Brake System (ABS) and Stability Control article.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. - Put the ABS module in sleep mode by performing the following steps: