RELAY AS 1748208 - Caterpillar

Illustration 1 g02599016
Connections of the Main Power RelayThis diagnostic code is associated with the Main Power Relay. The FMI 05 diagnostic code is recorded when the Transmission ECM reads the current of the relay as below normal (open circuit). This diagnostic code is activated on the ECM via CAN Data Link.The possible causes of this diagnostic code are listed below:
The energizer circuit of the relay is open.
The return circuit of the relay is open.
The relay has failed.
The ECM has failed. This failure is unlikely.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 3467 FMI 05 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.Test Step 1. CHECK THE RELAY.
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine. Ensure that the diagnostic code for the relay is active.
Disconnect the machine harness from the relay.
At the machine harness connector for the relay that is being tested, install a jumper wire. Install a jumper wire from the signal wire (306-GN) to ground (wire 975-WH).
Observe the status of the diagnostic code. The diagnostic code