Pinpoint Test Q: DTC (Diagnostic Trouble Code) U0253:87: Notes
Refer to Module Communications Network for schematic and connector information.
Normal Operation and Fault Conditions
The IPMB communicates with the APIM through the HS-CAN2, GWM and HS-CAN3.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0253:87 | Lost Communication With Accessory Protocol Interface Module: Missing Message | Sets in continuous memory in the IPMB if expected messages from the APIM are not received for 5 seconds or more when the ignition is on. |
Possible Causes
- Communication network concern
- APIM
- IPMB
- GWM