STORED LOST COMMUNICATION DTCS
STORED LOST COMMUNICATION DTCS
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For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on.
Battery voltage between 10 and 16 volts.
Ignition Off Draw (IOD) fuse installed.
Totally Integrated Power Module (TIPM) is configured correctly.
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Set Condition:
Bus messages not received for approximately two to five seconds.
Possible Causes |
|---|
| CAN C BUS CIRCUITS OPEN OR SHORT |
| CAN C INTERIOR BUS CIRCUITS OPEN OR SHORT |
| DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES |
| TIPM NOT CONFIGURED CORRECTLY |
| POWER OR GROUND FROM THE REPORTING MODULE |
| MODULE THAT SET THIS DTC |
| PREVIOUS SERVICE PERFORMED WITHIN 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 TSBS |
1. VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS STORED
| NOTE: | Stored faults may indicate a customer perceived intermittent condition. |
| NOTE: | Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding. |
| 1. | Turn the ignition on. |
| 2. | With the scan tool, read stored DTCs. |
Is this DTC stored?
Yes
- Go To 2
No
2. CHECK THE ENVIRONMENTAL DATA
| 1. | With the scan tool, read the loss of communication environmental data. |
Does the loss of communication environmental 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 configuration DTCs present with matching environmental data?
Yes
- These DTCs may have been the result of other service procedures performed. Clear the DTCs.
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
No
- Go To 3
3. VERIFY INTERMITTENT LOST COMMUNICATION DTC - WIRING CONCERNS
| 1. | With the scan tool, select Network View. |
Is there more than one ECU with stored DTCs “Logged Against” the module and one or more lost communication DTCs stored in the offending module?
Yes
- 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 signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension. Repair as necessary.
No
- Go To 4
4. VERIFY INTERMITTENT LOST COMMUNICATION DTC - OFFENDING MODULE
| 1. | With the scan tool, select Network View. |
Is there more than one ECU with stored DTCs “Logged Against” the module and NO lost communication DTCs stored in the offending module?
Yes
No
- Go To 5
5. VERIFY INTERMITTENT LOST COMMUNICATION DTC - REPORTING MODULE
| 1. | With the scan tool, select Network View. |
Is there ONLY ONE ECU with stored DTCs “Logged Against” the module?
Yes
No