PIN AS 2586358 - Caterpillar

Illustration 2 g03374886
Schematic for passive engine temperature sensors on the P2 ECM connector
Illustration 3 g03506760
P1 pin locations for the temperature sensors (4) Intake manifold air temperature sensor signal (5) Coolant temperature sensor signal (34) Sensor ground
Illustration 4 g03374910
P2 pin locations for the temperature sensors (37) Sensor ground (42) Intake manifold air temperature sensor signal (43) Coolant temperature sensor signal
Illustration 5 g01170313
Typical view of an engine temperature sensor (1) Signal (2) Ground
Table 2
Troubleshooting Test Steps    Values    Results    
1. Inspect Electrical Connectors and Wiring
A. Thoroughly inspect the terminal connections on the P1/J1 and P2/J2 ECM connectors and the temperature sensors.
Refer to Troubleshooting, "Electrical Connectors - Inspect".
B. Perform a
45 N (10 lb) pull test on each of the wires in the ECM connector and the sensor connectors that are associated with the active diagnostic code.
C. Check the screw for the ECM connector for the correct torque of
5 N m (44 lb in).
D. Check the harness for corrosion, abrasion, and pinch points from the engine temperature sensors to the ECM.
   
Loose connection or damaged wire    
Result: There is a fault in a connector or the wiring.
Repair any faulty connectors or replace the wiring harness. Ensure that all of the seals are properly in place and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly coupled and/or inserted. The harness is free of corrosion, abrasion, and pinch points.
Proceed to Test Step 2.
   
2. Check the Type of Diagnostic Code that is Active
A. Turn the keyswitch to the ON position. Wait at least 10 seconds for activation of the diagnostic codes.
B. Use the electronic service tool to check for active diagnostic codes. Record all active diagnostic codes.
   
Diagnostic codes    
Result: An XXXX-4 diagnostic code is active for one or more of the temperature sensors at this time.
Proceed to Test Step 3.
Result: An XXXX-3 diagnostic code is active for one or more of the temperature sensors at this time.
Proceed to Test Step 5.
   
3. Create An Open Circuit at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the connector for the sensor with the XXXX-4 diagnostic code.
C. Turn the keyswitch to the ON position. Wait for at least 10 seconds for activation of the diagnostic codes.
D. Use the electronic service tool to check the "Active Diagnostic Code" screen. Check for an XXXX-3 diagnostic code.
   
Diagnostic codes    
Result: An XXXX-4 diagnostic code was active before disconnecting the sensor. An XXXX-3 diagnostic code became active after disconnecting the sensor - the sensor is faulty.
Temporarily connect a new sensor to the harness, but do not install the new sensor in the engine. Use the electronic service tool in order to verify that the repair eliminates the fault and then permanently install the new sensor.
Use the electronic service tool to clear all logged diagnostic codes and verify that the repair eliminates the fault.
Result: The XXXX-4 diagnostic code is still active.
Proceed to