Pinpoint Test H: Lost Communication With RCM (Restraints Control Module) U0151:87
- Refer to MODULE COMMUNICATIONS NETWORK
for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: COMMUNICATIONS NETWORK .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition BCM U0151:87 Lost Communication With Restraints Control Module: Missing Message A continuous memory DTC that sets in the BCM if SRS messages received from the RCM through the GWM are missing. Possible Sources
- Communication network concern
- Battery voltage concern
- GWM
- RCM
- BCM
NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during the PMI or the PMI may not have been carried out. - H1 CHECK THE COMMUNICATION NETWORK
- Perform a network test.
Does the RCM pass the network test?
Yes GO to H2 No DIAGNOSE no communication with the RCM. REFER to: COMMUNICATIONS NETWORK . - H2 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE BCM (BODY CONTROL MODULE) SELF-TEST
- Clear the Diagnostic Trouble Codes (DTCs).
- Wait 10 seconds.
- Perform the BCM self-test.
Is DTC U3006:16 or U3006:17 recorded?
Yes For DTC U3006:16, GO to Pinpoint Test O For DTC U3006:17, GO to Pinpoint Test P No GO to H3 - H3 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST
- Perform the RCM self-test.
Are any voltage system related Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to: Airbag Supplemental Restraint System (SRS) - Vehicles Without: Rear Seat Side Airbag . No GO to H4 - H4 RECHECK THE BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Clear the Diagnostic Trouble Codes (DTCs).
- Wait 10 seconds.
- Perform the BCM self-test.
Is DTC U0151:87 present?
Yes GO to H5 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. - H5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0151:87 SET IN OTHER MODULES
- Clear all Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Is DTC U0151:87 set in other modules?
Yes GO to H6 No GO to H7 - H6 CHECK FOR CORRECT RCM (RESTRAINTS CONTROL MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all RCM connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the RCM connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes 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 RCM. Refer to RESTRAINTS CONTROL MODULE (RCM) No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues. - H7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all BCM connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the BCM connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes 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 BCM. Refer to Body Control Module (BCM) . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.