DOOR AS 1268453 - Caterpillar

Table 2
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Turn the main disconnect switch to the OFF position.
B. Verify that the air shutoff mechanisms are set to the OPEN position.
C. Thoroughly inspect the ECM connectors. Also, inspect the connectors at the air shutoff mechanism that are for the solenoids. Also, inspect the switches for the air shutoff. Refer to Troubleshooting, "Electrical Connectors - Inspect".
D. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit for the air shutoff system.
E. Check the allen head screw on each ECM connector for the proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
F. Check the harness and the wiring for abrasion and for pinch points from the air shutoff solenoid to the ECM.
Connectors
Result: The connectors and wiring appear to be OK.
Proceed to Test Step 2.
Result: The connectors and/or wiring are NOT OK.
Repair: Repair the wiring and/or the connectors. Replace parts, if necessary. Ensure that all of the seals are properly in place and ensure that the connectors are coupled.
Verify that the repair eliminated the problem.
2. Test the Operation of the Control Solenoid for the Air Shutoff Relay and Check for Logged Codes
A. Connect Cat ET to the service tool connector.
B. Restore the electrical power to the ECM.
C. Test the air shutoff system with the