U0100-00-LOST COMMUNICATION WITH ECM/PCM

For a complete wiring diagram, refer to the Wiring Information.

NOTE:
If present, diagnose and repair DTC U0002-88-CAN C BUS OFF PERFORMANCE- BUS OFF before diagnosing this DTC.

When Monitored:
Ignition run time is greater than one second. Battery voltage between 9 and 16 volts. Engine run time greater than three seconds.
Set Condition:
Bus messages not received from the Powertrain Control Module (ECM/PCM) for approximately two to five seconds.

Possible Causes
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
POWERTRAIN CONTROL MODULE POWER AND GROUND
TIPM NOT CONFIGURED CORRECTLY
POWERTRAIN CONTROL MODULE (ECM/PCM)
MODULE THAT SET THIS DTC

VERIFY DTC IS ACTIVE

NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding.

1.	Turn the ignition on.

2.	With the scan tool, read the active DTCs.

Is this DTC active?

Yes

(Refer to 28 - DTC-Based Diagnostics/MODULE, Body Control (BCM) /Diagnosis and Testing) and perform the U0100-Lost Communication with ECM/PCM diagnostic procedure.

(Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.