Pinpoint Tests: Notes

U0100:87 

Refer to Module Communications Network for schematic and connector information.

Normal Operation and Fault Conditions 

REFER to: Communications Network - System Operation and Component Description .

BCM DTC Fault Trigger Conditions 

DTC	Description	Fault Trigger Conditions
U0100:87	Lost Communication With ECM/PCM "A": Missing Message	A continuous memory DTC that sets in the BCM if powertrain data messages from the PCM over the HS-CAN1 are missing.

Possible Sources 

• Communication network concern
• Charging system concern
• PCM
• BCM