CONTROL GP-TRANSMISSION 4473257 - Caterpillar

Illustration 1 g01932596
Typical schematic
Illustration 2 g01258500
P1 ECM connector
(P1-5) Digital return
(P1-23) Emergency shutdown C
(P1-28) Emergency shutdown D
Illustration 3 g01258540
Connector "A"
(Terminal 21) Emergency shutdown D
(Terminal 23) Emergency shutdown C
(Terminal 25) Digital return
Illustration 4 g01258549
Connector "G"
(Terminal 3) Emergency shutdown D
(Terminal 7) Emergency shutdown C
(Terminal 37) Digital return
Illustration 5 g01234146
Location of ECM connectors
Test Step 1. Inspect Electrical Connectors and Wiring
Turn the breaker for the ECM to the OFF position.
Thoroughly inspect the ECM connectors J1/P1. Inspect all of the other connectors in the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the proper procedure for inspecting system wiring.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and the wiring for abrasion and for pinch points. 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 harness 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 the Status while the Emergency Stop Switch is Active
Connect Caterpillar Electronic Technician (ET) to the service tool connector.
Turn the breaker for the ECM to the ON position.
Start Cat ET.
Observe the status of the emergency stop