71565 1 Mariner TUBE, Steering Cable

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C-10 schematic for temperature sensors
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C-15 schematic for temperature sensors
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. Inspect Electrical Connectors and Wiring
Turn the keyswitch to the OFF position.
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C-10 left side engine view (1) Engine coolant temperature sensor (2) Intake manifold air temperature sensor (3) Fuel temperature sensor (4) J2/P2 ECM connector
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C-15 left side engine view (1) Engine coolant temperature sensor (2) Intake manifold air temperature sensor (3) Fuel temperature sensor (4) J2/P2 ECM connector
Thoroughly inspect ECM connectors (4) and the connectors for sensors (1), (2), and (3). Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
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P2 ECM connector (P2-13) Engine coolant temperature (P2-30) Sensor return (P2-56) Intake manifold air temperature (P2-62) Fuel temperature
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2-Pin connector for temperature sensors (typical example) (Pin 1) Sensor signal (Pin 2) Sensor return
Perform a 45 N (10 lb) pull test on each of the wires in the sensor connector and the ECM connector that are associated with the active diagnostic code.
Verify that the latch tab of the connector is properly latched.
Check the allen head screw on the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and wiring for abrasions and for pinch points from the sensor to the ECM.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The connectors and wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem in the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Active Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the keyswitch to the ON position.
Check for active diagnostic codes Cat ET. Record any active diagnostic codes.Note: Wait at least 15 seconds in order for the diagnostic codes to become active.
Determine if the problem is related to an open circuit diagnostic code -03 or a short circuit diagnostic code -04.Expected Result:No diagnostic codes are active.Results:
OK - No diagnostic codes are active.Repair: The problem may have been related to a faulty connection in the harness. Carefully reinspect the connectors and wiring. Refer to Troubleshooting, "Electrical Connectors - Inspect" for additional information.STOP
Not OK - A short circuit diagnostic code -04 is active at this time. Proceed to Test Step 3.
Not OK - An open circuit diagnostic code -03 is active at this time. Proceed to Test Step 4.Test Step 3. Disconnect the Suspect Sensor in Order to Create an Open Circuit
Turn the keyswitch to the OFF position.
Disconnect the suspect sensor from the harness at the sensor connector.
Turn the keyswitch to the ON position. Wait at least 15 seconds for activation of the diagnostic codes.
Check Cat ET for an active open circuit diagnostic code -03 for the suspect sensor.
Turn the keyswitch to the OFF position.Expected Result:An open circuit diagnostic code -03 is now active for the suspect sensor.Results:
OK - A short circuit diagnostic code -04 was active before disconnecting the sensor. An open circuit diagnostic code -03 became active after disconnecting the sensor.Repair: Temporarily connect a new sensor to the harness, but