GEAR-CAMSH-YM 2794981 - Caterpillar

Illustration 6 g00750362
Terminal locations for analog sensor connector
Turn the keyswitch to the ON position.
Fabricate a jumper wire 150 mm (6 inch) long. Crimp a Deutsch terminal to both ends of the wire.
Monitor the "Active Diagnostic Code" screen before installing the jumper wire and after installing the jumper wire.
Install the jumper on the engine harness connector. Install one end of the jumper at the sensor signal (pin "C"). Install the other end of the jumper at the common connection for the analog sensor (pin "B"). Wait at least 15 seconds for activation of the short circuit diagnostic code.Refer to Illustration 6.Expected Result:A short circuit diagnostic code is active when the jumper is installed. An open circuit diagnostic code is active when the jumper is removed.Results:
OK - The engine harness and the ECM are OK.Repair: Perform the following repair:
Temporarily connect the suspect sensor.
If the diagnostic code remains active, replace the sensor.
Ensure that the diagnostic code is no longer active.
Verify that the repair eliminates the problem.STOP
Not OK - The open circuit diagnostic code remains active when the jumper is installed. The most probable location for the open is the sensor signal wire in the engine harness between the ECM and the sensor. Remove the jumper. Proceed to test step 8.Test Step 8. Check The Operation Of The ECM By Creating Open And Short Circuits At The ECM Connector.
Illustration 7 g00933750
Terminal locations
Illustration 8 g00750291
Terminal locations for P61 Customer Connector
Turn the keyswitch to the OFF position.
Disconnect ECM connectors J2/P2 and J1/P1. Thoroughly inspect both halves of the connectors for signs of corrosion or moisture.
Insert a 70 pin Breakout T between ECM connector J1/P1 or ECM connector J2/P2. This is dependent upon the location of the suspect sensor.
Turn the keyswitch to the ON position. Monitor the "Active Diagnostic Code" screen. Wait at least 15 seconds for activation of the code.
Turn the keyswitch to the OFF position.
Fabricate a jumper wire 150 mm (6 inch) long. Crimp a Deutsch pin to both ends of the wire.
Insert the jumper wire between the socket for the suspect sensor signal and the common connection for the analog sensor (pin 3).A short circuit diagnostic code should be active when the jumper wire is installed.Refer to Illustration 7 for the engine harness connector P2.Expected Result:Open circuit diagnostic codes and short circuit diagnostic codes were active.Results:
OK - The ECM is operating properly. Proceed to Test Step 9.
Not OK - One of the following conditions exists: The open circuit diagnostic code is not active when the harness is disconnected. The short circuit diagnostic code is not active when the jumper wire is installed.Repair: Perform the following repair:
Temporarily connect a test ECM.
Remove all jumpers and reconnect all connectors.
Recheck the system for active diagnostic codes.
Repeat the test step.
If the problem is resolved with the test ECM, reconnect the suspect ECM.
If the problem returns with the suspect ECM, replace the ECM.
Verify that the repair eliminates the problem.STOPTest Step 9. Bypass The Harness Wiring Between The ECM And The Sensor Connector.
Turn the keyswitch to the OFF position.
Remove the suspect sensor