Pinpoint Test D : Lost Communication With ECM/Pcm "A" U0100:87
WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
- D1 VERIFY THE DIAGNOSTIC SCAN TOOL COMMUNICATES WITH THE PCM (POWERTRAIN CONTROL MODULE)
- Ignition ON.
- Connect the diagnostic scan tool.
- Check that a vehicle session can be established.
Can a vehicle session be established?
Yes GO to D2 No DIAGNOSE no communication with the PCM. REFER to: Communications Network . - D2 CHECK THE BCM (BODY CONTROL MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Clear the Diagnostic Trouble Codes (DTCs).
- Wait 10 seconds.
- Check the BCM Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Is DTC U0100:87 set?
Yes GO to D3 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. - D3 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PCM (POWERTRAIN CONTROL MODULE) KOEO (KEY ON, ENGINE OFF) SELF-TEST
- Perform the PCMKOEO self-test.
Are any voltage system related Diagnostic Trouble Codes (DTCs) recorded?
Yes Refer to the appropriate Engine article for the procedure. No GO to D4 - D4 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE BCM (BODY CONTROL MODULE) SELF-TEST
- Perform the BCM self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?
Yes REFER to the DTC Chart: Body Control Module (BCM) . No GO to D5 - D5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0100:87 SET IN OTHER MODULES
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Is DTC U0100:87 set in other modules?
Yes GO to D6 No GO to D7 - D6 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all PCM 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 PCM 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, Refer to PCM GUIDED ROUTINE TESTING . 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. - D7 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 m 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, Refer to BCM GUIDED ROUTINE TESTING 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.