HOSE AS 8Y9277 - Caterpillar

Illustration 1 g01094676
Test Step 1. Check to see if diagnostic code "CB 30" is active.Expected Result:"CB 30" is not active.Results:
YES - "CB 30" is not active. Proceed to Test Step 2.
NO - "CB 30" is active.Repair: Proceed to Troubleshooting, "CB 30 Duplicate Sensor Serial Number". Stop.Test Step 2. CHECK THE HARNESS FOR AN OPEN.
Move the power/setup switch on the AccuGrade Laser display to the OFF position.
Turn the key start switch and the disconnect switch for the machine to the OFF position.
Disconnect the harness from the right radiator guard connector.
Measure the resistance between pin "2" and pin "6".Expected Result:The resistance is less than 5.0 ohms.Results:
OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5000 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in wire T744-WH of the machine harness. Repair the machine harness or replace the machine harness. Stop.Test Step 3. CHECK THE RIGHT RADIATOR GUARD HOUSING CONNECTOR FOR AN OPEN.
At the right hand electric mast harness connector, located on the radiator guard housing, measure the resistance between pin "2" and pin "6".Expected Result:The resistance is less than 5.0 ohms.Results:
OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 4.
NOT OK - The resistance is greater than 5000 ohms. The resistance measurement is not correct. There is an open circuit in the connector.Repair: The open is in wire T744-WH of the machine harness. Repair the connector or replace the connector that is located on the right hand side of the radiator guard housing. Stop.Test Step 4. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors and clean the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Move the power/setup switch on the AccuGrade Laser display to the ON position.
Operate the machine.
Check the status of the "EM 32".Expected Result:The "EM 32" diagnostic code is active.Results:
YES - The "EM 32" diagnostic code is active. The diagnostic code has not been corrected. Repair: Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, contact your dealerships Technical Communicator for a possible consultation with Caterpillar. Stop.
NO - The "EM 32" diagnostic code is not active. The diagnostic code does not exist at this time.Repair: The initial diagnostic code was probably caused by a poor electrical connection at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation. Stop.