Manual Three Zone Temperature Control

U0156-Lost Communication With EOM

For a complete wiring diagram, refer to.

• When Monitored: Continuously when the ignition is on. The battery voltage is between 10 and 16 volts. Ignition Off Draw (IOD) fuse installed. Totally Integrated Power Module (TIPM) is configured correctly.

• Set Condition: Bus messages not received from the Electronic Overhead Module (EOM) for approximately two to five seconds.






Test Step 1 - VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

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

• Turn the ignition on.

• With the scan tool, read the active DTCs.

Is this DTC active?

Yes

• Refer to => Electrical System DTC Based Diagnostics and perform the U0156-Lost Communication with EOM diagnostic procedure.

No

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