770, 772, 773E, 773F, 777E and 777F Off-Highway Trucks and 775F Quarry Truck VIMS Truck Payload System Caterpillar

Illustration 1	g01300912
Troubleshooting Chart

This diagnostic code is recorded when the ECM for the payload system determines that the ECM has never been calibrated.

The possible causes of this diagnostic code are listed:

• The ECM has never been calibrated.

• The ECM has lost all of the permanent information on the setup of the machine.

Test Step 1. RECALIBRATE THE SYSTEM

1. Recalibrate the system.

   Reference: See the Systems Operation, "Truck Payload - Calibrate" section in this manual.

2. Clear the diagnostic code from memory.

   Reference: See the Troubleshooting, "Using Advisor to Determine Diagnostic Codes" and the Troubleshooting, "Using Messenger to Determine Diagnostic Codes" sections in this manual.

Expected Result:

The payload system functions properly.

Results:

• YES - The payload system functions properly.

  STOP

• NO - The payload system does not function properly.

  Repair: It is unlikely that the ECM has failed. Perform the previous steps again. If the cause of the problem is not found, replace the ECM for the payload system. See the Testing And Adjusting, "Payload Electronic Control Module (ECM) - Replace" section in this manual.

  STOP