Failures in Hardware in VIMS ECM{7601} Caterpillar

Excavator:

5230B (S/N: 4HZ1-UP)

Off-Highway Truck/Tractor:

784C (S/N: 2PZ1-UP)

785B (S/N: 6HK1-UP)

785C (S/N: 1HW1-UP; 5AZ1-UP; APX1-UP)

789B (S/N: 7EK1-UP)

789C (S/N: 2BW1-UP)

793B (S/N: 1HL1-UP)

793C (S/N: 4AR1-UP; ATY1-UP; CBR1-UP)

793D (S/N: FDB1-UP)

797 (S/N: 5YW1-UP)

797B (S/N: JSM1-UP)

Wheel Dozer:

854G (S/N: A4W1-UP)

Wheel Loader:

992G (S/N: AZX1-UP)

994F (S/N: 4421-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

The VIMS ECM (ABL platform) exhibits failures of hardware with the battery-backed memory. The backup battery will run down and lose the battery-backed memory. This usually results in replacement of the ECM. When the battery used by the 160-4891 Electronic Control Module (VIMS) requires replacement, the following indications are evident:

• a large number in Service Meter Hour (SMH)

• a large number in the odometer reading

Solution

A new procedure for the replacement of the battery exists for all 160-4891 Electronic Control Modules (VIMS). For details on replacing the failed battery backup, refer to the following listed references:

• Troubleshooting, Testing and Adjusting, RENR2631, "Battery - Replace"

• Systems Operation, Troubleshooting, Testing and Adjusting, RENR6318, "Battery - Replace"

• Systems Operation, Troubleshooting, Testing and Adjusting, RENR3376, "Battery - Replace"

• Systems Operation, Testing and Adjusting, SENR6059, "Battery - Replace"

The documents for reference that are listed above have been updated with a detailed procedure and a list for required tools.