Stored Lost Communication DTC

Stored Lost Communication DTC - With the ignition on, battery voltage between 10 and 16 volts, ignition Of Draw (IOD) fuse installed, tTotally Integrated Power Module (TIPM) or Body Control Module (BCM) is configured correctly.

Set Condition 

• Bus messages not received for approximately two to five seconds.

Possible Cause 

• CAN C Bus circuits open or short.
• CAN C interior Bus circuits open or short
• DTC related to battery voltage, ignition, or VIN messages.
• TIPM/BCM not configured correctly.
• Power or ground from the reporting module.
• Module that set this DTC.
• Previous service performed whitin the last 100 key cycles (fuse/relays removed, wiring service, battery disconnect).
• Low battery/jump start condition.
• IOD fuse was removed during shipping.
• Check for related TSB.

Step by step diagnostic Stored Lost Communication DTC 

Step 1. Verify Diagnostic Trouble Code (DTC) is Stored

Stored faults may indicate a customer perceived intermittent condition. Make sure the IOD fuse installed and battery voltage is between 10 and 16 volts before proceeding. Turn the ignition on, with the scan tool, read DTC.

Is this DTC Stored ?

Yes, go to step 2.

No, go to and perform the appropriate diagnostic procedure.

Step 2. Check the Environmental Data

With the scan tool, read the lost of communication environmental data.

Does the loss of communication environmental data odometer data match up to any of the previous service procedures listed in the possible causes or are there any stored CAN C hardware electrical, battery, ignition voltage, VIN missing/mismatch, or TIPM/BCM configuration DTC present with matching envirionmental data ?

Yes, these DTC may have been the result of other service procedures performed, clear the DTC. Perform the Body Verification Test.
No, go to step 3.

Step 3. Verify Intermittent Lost Communication DTC-wiring concerns
With the scan tool, select network view.

Is there more than one ECU with stored DTC ''Logged Against'' the module and one or more lost communication DTC stored in the offending module ?

Yes, verify if the vehicle was recently in for this type of service. Otherwise, using wiring diagram as a guide, check all related splices and connectors for signs if water intrusion, corosion, pushed out or bent terminals, and correct pin tension. Repair as necessary.
No, go to step 4.

Step 4. Verify intermittent Lost Communication DTC - Offending module
With the scan tool, select network view.

Is there more than one ECU with stored DTC ''Logged Against'' the module and No lost Communication DTC stored in the offending module ?

Yes, check for a Service Bulletin  related to this offending module.
No, go to step 5.

Step 5. Verify intermittent lost communication DTC - Reporting module
With the scan tool, select network view.

Is there ONLY ONE ECU with stored DTC ''Logged Against'' the module ?

Yes, check for a Service Bulletin related to the module that set this DTC.
No, verify if the vehicle was recently in for this type of service. Otherwise, using the wiring diagrams as a guide, check all related splices and connectors for sign of water intrusion, corrosion, pushed out ben terminals, and correct pin tension. Repair as necessary.

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