Pinpoint Test F: DTC U0140:87

Body Control Module B (BCM-B)

Pinpoint Test F: DTC U0140:87

Normal Operation

- DTC U0140:87 (Lost Communication With Body Control Module: Missing Message)- a continuous memory DTC set by the BCM-B (Body Control Module B) if data messages received from the SJB (Smart Junction Box) over the the Medium Speed Controller Area Network (MS-CAN) are missing for 5 seconds or longer.

This pinpoint test is intended to diagnose the following:

- Communication network concern

- BCM-B (Body Control Module B)

- SJB (Smart Junction Box)

PINPOINT TEST F : DTC U0140:87

F1 VERIFY CUSTOMER CONCERN

- Ignition ON.

- Verify that there is an observable symptom present.

Is an observable symptom present?

Yes
GO to F2.

No
The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

F2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Network Test.

- Carry out the network test.

Does the SJB (Smart Junction Box) pass the network test?

Yes
GO to F3.

No
REFER to Information Bus, The SJB (Smart Junction Box) Does Not Respond To The Scan Tool Pinpoint Test F: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool.

F3 RETRIEVE THE RECORDED DTCs FROM THE SELF-TEST

- Check for recorded BCM-B (Body Control Module B) DTCs from the self-test.

Is DTC U3003:62 recorded?

Yes
GO to Pinpoint Test I Pinpoint Test I: DTC U3003:62.

No
GO to F4.

F4 RECHECK THE BCM-B (Body Control Module B) DTCs

NOTE: If new modules were installed prior to the DTC being set, the module configuration may be incorrectly set during Programmable Module Installation (PMI) or the PMI (Programmable Module Installation) may not have been carried out.

- Clear the DTCs. Repeat the BCM-B (Body Control Module B) self-test.

Is DTC U0140:87 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 U0140:87 SET IN OTHER MODULES

- Clear all DTCs.

- Ignition OFF.

- Ignition ON.

- Wait 10 seconds.

- Enter the following diagnostic mode on the scan tool: Self-Test.

- Retrieve the continuous memory DTCs from all modules.

Is DTC U0140:87 or DTC U0140 set in any other module?

Yes
INSTALL a new SJB (Smart Junction Box). REFER to Smart Junction Box (SJB) . CLEAR the DTCs. REPEAT the BCM-B (Body Control Module B) self-test.

No
INSTALL a new BCM-B (Body Control Module B). REFER to Body Control Module B (BCM-B) . TEST the system for normal operation.