Pinpoint Test J : U0151:87

WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Supplemental Restraint System for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the RCM sends messages to the VDM over the HS-CAN2. If the VDM does not receive these messages within a certain time frame, the module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the VDM by the RCM, go to the Network Message Chart. REFER to: Vehicle Dynamic Suspension - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
VDM U0151:87	Lost Communication With Restraints Control Module: Missing Message	This DTC sets in continuous memory if any one of the following messages is missing: vehicle lateral acceleration, vehicle longitudinal acceleration, vehicle roll rate or vehicle vertical acceleration. This can be due to a RCM failure, a circuit failure on the HS-CAN or an excessive load on the network

Possible Sources

Wiring, terminals or connectors
Network communication concern
Vehicle battery
Charging system concern
RCM

J1 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a diagnostic scan tool, carry out the Network Test.
Does the RCM pass the Network Test?

Yes GO to J2

No DIAGNOSE the RCM does not respond to the diagnostic scan tool. REFER to: Communications Network .

J2 CHECK THE VDM (VEHICLE DYNAMICS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, carry out the VDM self-test.

Clear the Diagnostic Trouble Codes (DTCs).

Ignition ON.

Ignition OFF.

Using a diagnostic scan tool, carry out the VDM self-test.

Record the VDM Diagnostic Trouble Codes (DTCs).

Is DTC U0151:87 retrieved again?

Yes

GO to J3

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.

J3 REVIEW THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE VDM (VEHICLE DYNAMICS CONTROL MODULE) SELF-TEST
- Check the recorded Diagnostic Trouble Codes (DTCs) from the VDM self-test.
Is DTC U3003:16 or U3003:17 present in the VDM?

Yes If DTC U3003:16 is present, GO to Pinpoint Test A If DTC U3003:17 is present, GO to Pinpoint Test B

No GO to J4

J4 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE RCM (RESTRAINTS CONTROL MODULE)
- Using a diagnostic scan tool, carry out the RCM self-test.
Are any Diagnostic Trouble Codes (DTCs) present in the RCM?

Yes DIAGNOSE the RCM Diagnostic Trouble Codes (DTCs). REFER to: Airbag Supplemental Restraint System (SRS) .

No GO to J5

J5 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 RCM or VDM. 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

GO to J6

No	The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

J6 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0151:XX SET IN OTHER MODULES

Using a diagnostic scan tool, carry out the self-test for all modules.

Is DTC U0151:xx set in 1 or more modules in addition to the VDM?

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 Technical Service Bulletins (TSBs) exist for this concern, INSTALL a new RCM module. REFER to: Restraints Control Module (RCM) .

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 Technical Service Bulletins (TSBs) exist for this concern, INSTALL a new VDM module. REFER to: Vehicle Dynamics Control Module (VDM)