RADIATOR & AFTERCOOLER GP 2588684 - Caterpillar

Table 2
Code Description Cylinders
1501-3 Cylinder #1 Detonation Sensor : Voltage Above Normal 1 and 3
1501-4 Cylinder #1 Detonation Sensor : Voltage Below Normal
1502-3 Cylinder #2 Detonation Sensor : Voltage Above Normal 2 and 4
1502-4 Cylinder #2 Detonation Sensor : Voltage Below Normal
1505-3 Cylinder #5 Detonation Sensor : Voltage Above Normal 5 and 7
1505-4 Cylinder #5 Detonation Sensor : Voltage Below Normal
1506-3 Cylinder #6 Detonation Sensor : Voltage Above Normal 6 and 8
1506-4 Cylinder #6 Detonation Sensor : Voltage Below Normal
1509-3 Cylinder #9 Detonation Sensor : Voltage Above Normal 9 and 11
1509-4 Cylinder #9 Detonation Sensor : Voltage Below Normal
1510-3 Cylinder #10 Detonation Sensor : Voltage Above Normal 10 and 12
1510-4 Cylinder #10 Detonation Sensor : Voltage Below Normal Note: An -4 diagnostic code can indicate either an actual short to ground or an open circuit.Expected Result:None of the above diagnostic codes are active.Results:
OK (No active codes) - None of the above codes are active at this time. The problem seems to be resolved. The original diagnostic code was probably caused by a poor electrical connection in one of the harness connectors.Repair: If any of the above codes are logged and the engine is not running properly, refer to Troubleshooting, "Symptom Troubleshooting".If any of the above codes are logged and the engine is running properly, there may be an intermittent problem in a connector or a wiring harness. Refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK (Active Code) - A -3 or -4 diagnostic code was activated.Repair: Note the diagnostic code and note the location of the suspect detonation sensor.Proceed to Test Step 4.Test Step 4. Verify the Presence of the Supply Voltage at the Sensor
Disconnect