SPRING-CONICAL 3H3990 - Caterpillar

Illustration 2 g03320811
P1/J1 ECM connector
(P1-55) + battery
(P1-56) Air shutoff detect
Illustration 3 g03320812
P2/J2 ECM connector
(P2-13) Air shutoff drive
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. Thoroughly inspect the ECM connectors. Inspect all of the connectors that are associated with the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit.
D. Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
E. Check the harness and wiring for abrasion and for pinch points from the sensors back to the ECM.
Connectors
Results: The harness and connectors appear to be OK.
Proceed