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LINK-DRIVE 0000737 - Caterpillar



0000737 LINK-DRIVE Caterpillar parts LINK
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71
Alternative (cross code) number:
CA0000737
000-0737
0000737
Caterpillar 0000737 LINK-DRIVE

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Illustration 1 g01003284
Schematic of the Circuit for the Start RelayThis diagnostic code is recorded when the ECM reads the voltage of the start relay as above normal (short to the +battery circuit).Note: This procedure can cause new diagnostic codes to be recorded. Ignore these created diagnostic codes. Complete the following procedure. Then clear the created diagnostic codes.System Response:The action lamp and the action alarm are ON.Test Step 1. CHECK THE SIGNAL CIRCUIT OF THE RELAY FOR A SHORT.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the relay.
Disconnect the machine harness connectors J1 and J2 from the ECM.
At the J1 and J2 machine harness for the ECM, measure the resistance of the relay circuit J2-7 (wire 374-PK) to all contacts that are used in the machine harness connectors for the ECM.Expected Result:Each resistance should be greater than 5000 ohms.Results:
YES - Each resistance should be greater than 5000 ohms. The machine harness is correct. Proceed to test step 2.
NO - Each resistance is NOT greater than 5000 ohms. There is a short in the machine harness.Repair: The short is between the signal contact of the relay and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts and clean the contacts of the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Clear all of the logged diagnostic codes.
Operate the machine.
Stop the machine. Then place the parking brake switch in the ON position.
Observe the status of the diagnostic code. The diagnostic code is present or the diagnostic code is NOT present.Expected Result:The diagnostic code for the relay is NO longer present.Results:
YES - The diagnostic code is NOT present.Repair: The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor electrical connection and/or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.STOP
NO - The diagnostic code has not been corrected. The ECM may have failed. Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this diagnostic code again. Recheck the status of the diagnostic code. The diagnostic code is active or the diagnostic code is NOT active. Replace the ECM if the cause is not found. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP


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