HOSE ASSEM. (60.50 in. long overall) 8K3202 - Caterpillar

System Operation Description:Use this procedure to troubleshoot any suspect problems with the auxiliary temperature sensor.Use this procedure to troubleshoot the following diagnostic codes:
1836-03 Auxiliary Temperature Sensor open/short to +batt
1836-04 Auxiliary Temperature Sensor short to groundThe auxiliary temperature sensor receives a regulated voltage supply of 8.0 0.4 VDC from the Electronic Control Module (ECM).Note: Refer to the diagnostic functional test Troubleshooting, "Digital Sensor Supply Circuit - Test" if the ECM has detected a problem with the digital sensor supply voltage.Note: The circuit for the auxiliary temperature sensor utilizes a resistor assembly that is wired in parallel across the signal wire and the return wire. The resistor is used to condition the pulse width modulated signal for the ECM. If the resistor is not present in the circuit then diagnostic codes for the sensor will become active. The resistor is installed in the harness between the customer connector and the sensor connector.
Illustration 1 g01136421
Schematic for auxiliary temperature sensor
The connection of any electrical equipment and the disconnection of any electrical equipment may cause an explosion hazard which may result in injury or death. Do not connect any electrical equipment or disconnect any electrical equipment in an explosive atmosphere.
Test Step 1. Verify that the Auxiliary Temperature Sensor is Installed
Locate the auxiliary temperature sensor. Verify that a auxiliary temperature sensor is installed.
Connect Cat ET to the service tool connector. Check the "Auxiliary Temperature Sensor" parameter on the configuration screen.Expected Result:An auxiliary temperature sensor is installed on the application and the "Auxiliary Temperature Sensor" parameter is programmed to a value of "1" to "120" in Cat ET.Results:
OK - The auxiliary temperature sensor is properly installed. Proceed to Test Step 2.
Not OK - The auxiliary temperature sensor is not installed on the application.Repair: Change the "Auxiliary Temperature Sensor" parameter to "0", or install the sensor. Verify that the repair eliminates the problem.STOP
Not OK - The "Auxiliary Temperature Sensor" parameter is improperly programmed.Repair: Use Cat ET to program the "Auxiliary Temperature Sensor" parameter to a value of "1" to "120". Verify that the repair eliminates the problem.STOPTest Step 2. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g01136484
Top view (1) P1 ECM connector (2) P2 ECM connnector (3) P3 Customer connetor
Thoroughly inspect connectors (1), (2), and (3). Also inspect the connector for the auxiliary temperature sensor. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 3 g01136422
ECM P1 connector (P1-35) +8 V Supply (P1-29) Return
Illustration 4 g01136469
ECM P2 connector (P2-25) Auxiliary temperature sensor
Illustration 5 g01136423
J3 and P3 connectors (8) +8 V supply (9) Return (11) Auxiliary temperature sensor
Perform a 45 N (10 lb) pull test on each of the wires that is associated with the auxiliary temperature sensor circuit.
Check the torque of the allen head screws for the ECM connectors and for the customer connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness