Pinpoint Test F: U0131:87
WARNING: This page is about a different car, the 2023 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
- Refer to MODULE COMMUNICATIONS NETWORK
for schematic and connector information.
Normal Operation and Fault Conditions
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition BCM U0131:87 Lost Communication With Power Steering Control Module 'A': Missing Message A continuous memory DTC that sets in the BCM if messages from the PSCM module are missing. Possible Sources
- Communication network concern
- PSCM
- 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. - F1 CHECK THE COMMUNICATION NETWORK
- Connect the diagnostic tool.
- Ignition ON.
- Using a diagnostic scan tool, perform a network test.
Does the PSCM pass the network test?
Yes GO to F2 No - F2 CHECK THE BCM (BODY CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
- Wait 10 seconds.
- Using a diagnostic scan tool, check the BCM CMDTCs.
Is DTC B11D9:16, B11D9:17, U3006:16, U3006:17, U3007:16, U3007:17, U3013:16, U3013:17, U3014:16 or U3014:17 recorded?
Yes For DTC B11D9:16, U3006:16, U3007:16, U3013:16 or U3014:16, GO to Pinpoint Test AF For DTC B11D9:17, U3006:17, U3007:17, U3013:17 or U3014:17, GO to Pinpoint Test AG No GO to F3 - F3 RETRIEVE THE PSCM (POWER STEERING CONTROL MODULE) DTCS
- Using a diagnostic scan tool, perform the PSCM self-test.
Are any PSCM DTCs present?
Yes REFER to: Power Steering . No GO to F4 - F4 RECHECK THE BCM (BODY CONTROL MODULE) CMDTCS
- Using a diagnostic scan tool, clear the Diagnostic Trouble Codes (DTCs).
- Wait 10 seconds.
- Using a diagnostic scan tool, check the BCM CMDTCs.
Is DTC U0131:87 still present?
Yes GO to F5 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. - F5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0131:87 SET IN OTHER MODULES
- Using a diagnostic scan tool, clear the DTCs.
- Ignition OFF.
- Wait 10 seconds.
- Ignition ON.
- Using a diagnostic scan tool, retrieve all CMDTCs.
Is DTC U0131:87 set in other modules?
Yes GO to F6 No GO to F7 - F6 CHECK FOR CORRECT PSCM (POWER STEERING CONTROL MODULE) MODULE OPERATION
- Ignition OFF.
- Disconnect and inspect the PSCM connector.
- 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 PSCM module connector. Make sure it 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 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 PSCM module. REFER to: Steering Gear . 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. - F7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect the 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.