Pinpoint Test I: U0198:87
WARNING: This page is about a different car, the 2021 Ford F-150. 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
REFER to: Module Controlled Functions - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition BCM U0198:87 Lost Communication With Telematic Control Module "A": Missing Message A continuous memory DTC that sets in the BCM if messages received from the TCU are missing. Possible Sources
- Communication network concern
- Battery voltage concern
- TCU
- BCM
- I1 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Connect the diagnostic tool.
- Using a diagnostic scan tool, perform a network test.
Does the TCU pass the network test?
Yes GO to I2 No REFER to: Module Controlled Functions - System Operation and Component Description . - I2 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 Y For DTC B11D9:17, U3006:17, U3007:17, U3013:17 or U3014:17, GO to Pinpoint Test Z No GO to I3 - I3 RETRIEVE THE TCU (TELEMATIC CONTROL UNIT MODULE) DTCS
- Using a diagnostic scan tool, perform the TCU self-test.
Are any TCU DTCs recorded?
Yes REFER to: Information and Entertainment System . No GO to I4 - I4 RECHECK THE BCM (BODY CONTROL MODULE) CMDTCS
- Using a diagnostic scan tool, clear the DTCs.
- Wait 10 seconds.
- Using a diagnostic scan tool, check the BCM CMDTCs.
Is DTC U0198:87 still present?
Yes GO to I5 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. - I5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0198:87 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 U0198:87 set in other modules?
Yes GO to I6 No GO to I7 - I6 CHECK FOR CORRECT TCU (TELEMATIC CONTROL UNIT MODULE) OPERATION
- Ignition OFF.
- Disconnect and inspect all TCU 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 all TCU connectors.
- 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 TCU. REFER to: Telematics Control Unit (TCU) Module . 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. - I7 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 all 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.