5130, 5130B and 5230 Excavators, 784B, 785B, 785C, 789B, 789C, 793B and 793C Off-Highway Truck/Tractors and 992G, 994 and 994D Wheel Loaders Vital Information Management System (VIMS) Caterpillar

Illustration 1	g00507787
Schematic of the VIMS service indicator lamp

This diagnostic code is recorded when the VIMS module reads the current of the service indicator lamp circuit (wire E709-WH(White)) and the current is below normal. The service indicator lamp will not light if this diagnostic code is present.

1. CHECK THE LAMP.

   1. At the service indicator lamp, use a jumper to connect wire E709-WH(White) to frame ground.

      Expected Result: The diagnostic code CID 0823 FMI 05 is still active.

      Results:

      • OK - This diagnostic code remains active. The service indicator lamp is not causing the fault. Proceed to 2.

      • NOT OK - This diagnostic code is not present. The lamp or the lamp socket is open. Replace the service indicator lamp. For the purposes of this procedure, the correct resistance for a lamp is less than 200 ohms. STOP.

2. CHECK THE HARNESS.

   1. Turn the key start switch and the disconnect switch to the OFF position.

   2. Remove the jumper wire between wire E709-WH(White) and frame ground. Verify that the service indicator lamp is connected to the machine harness.

   3. Disconnect the machine harness from the VIMS main module.

   4. At the machine harness connector for the VIMS main module, measure the resistance between contact 21 (wire E709-WH(White)) and frame ground.

      Expected Result: The resistance is greater than 100 ohms.

      Results:

      • OK - Resistance is greater than 100 ohms. The harness circuit is open. Proceed to 3.

      • NOT OK - Resistance is less than 100 ohms. The harness circuit resistance is correct. Replace the VIMS main module. Refer to the Testing and Adjusting, "Module - Replace"section. STOP.

3. CHECK THE HARNESS.

   1. Disconnect the signal wire (E709-WH(White)) from the service lamp socket.

   2. Measure the resistance between contact 21 of the VIMS main module harness connector and the lamp socket.

   3. Measure the resistance between the lamp socket and the frame ground.

      Expected Result: The resistance is less than 5 ohms.

      Results:

      • OK - Resistance is less than 5 ohms. The circuit is correct. The failure is intermittent. Check all harness connections. STOP.

      • NOT OK - Resistance is greater than 5 ohms. The circuit is NOT correct. Repair the machine harness or replace the machine harness. STOP.