Lost Communication With the PCM

U0100 - Lost Communication With The PCM

For a complete wiring diagram, refer to.

• 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 (PCM) for approximately two to five seconds.






Test Step 1 - ACTIVE DTC

• Ignition on, engine not running.

• With the scan tool, select view DTCs.

Does the scan tool display as active: U0100-LOST COMMUNICATION WITH THE ECM/PCM?

Yes

• Refer to => Electrical Equipment DTC Based Diagnostics and perform the U0001-CAN C Bus diagnostic procedure. U0001

No

• perform the Stored Lost Communication DTCs diagnostic procedure. Stored Lost Communication DTCs Refer to => Non-DTC Based Diagnostics.