Pinpoint Tests AY: DTC U0140:00

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test AY: DTC U0140:00

Normal Operation
- DTC U0140:00 (Lost Communication With Body Control Module: No Sub-Type Information) - sets in continuous memory in the Instrument Panel Cluster (IPC) if data messages received from the Body Control Module (BCM) over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or longer. For a complete list of all network messages, refer to Module Communications Network Testing and Inspection.

This pinpoint test is intended to diagnose the following:

- BCM
- IPC

PINPOINT TEST AY: DTC U0140:00

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AY1 VERIFY THE CUSTOMER CONCERN

- Ignition ON.
- Verify there is an observable symptom present.
- Is an observable symptom present?

Yes
GO to AY2.

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.

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AY2 CHECK THE COMMUNICATION NETWORK

- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the BCM pass the network test?

Yes
GO to AY3.

No
REFER to Module Communications Network Testing and Inspection.

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AY3 RETRIEVE THE RECORDED DTCs FROM THE BCM SELF-TEST

- Check for recorded DTCs from the BCM self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
REFER to Multifunction Electronic Modules Multifunction Electronic Modules.

No
GO to AY4.

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AY4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded DTCs from the IPC self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?

Yes
For DTC U3003:16, GO to Pinpoint Test BD Pinpoint Tests BD: DTC U3003:16. For DTC U3003:17, GO to Pinpoint Test BE Pinpoint Tests BE: DTC U3003:17.

No
GO to AY5.

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AY5 RECHECK THE IPC DTCs

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

- Clear the DTCs.
- Wait 10 seconds.
- Repeat the IPC self-test.
- Is DTC U0140:00 still present?

Yes
GO to AY6.

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.

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AY6 CHECK FOR DTC U0140 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 set in the Restraints Control Module (RCM), Driver Seat Module (DSM) or the Driver Door Module (DDM)?

Yes
INSTALL a new BCM. REFER to Multifunction Electronic Modules Service and Repair. CLEAR the DTCs. REPEAT the self-test.

No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.

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