SOFTWARE GP-MONITOR 3837615 - Caterpillar

Illustration 1 g01810896
Schematic for the ride control switchTest Step 1. Check For Connector Damage
Remove electrical power from the ECM.
Thoroughly inspect the J1/P1 and thoroughly inspect the J2/P2 ECM connectors. Thoroughly inspect any connectors that are associated with the ride control switch. Refer to Troubleshooting, "Electrical Connectors - Inspect".
Illustration 2 g01139425
ECM (1) J1/P1 connectors (2) J2/P2 connectors
Illustration 3 g01823420
P1 ECM connector (P1-29) Digital return
Illustration 4 g01823555
P2 ECM connector (P2-1) Ride control switch 2 (P2-25) Ride control switch 1
Perform a 45 N (10 lb) pull test on each of the wires for the lamp circuits.
Check the torque of the allen head screw on the ECM connectors. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.
Check the harness and the wiring for abrasion and for pinch points from the dash display back to the ECM.Expected Result:All of the connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to next Step 2.
Not OK - The connectors and/or wiring are not OK.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 Switch Status On the Cat ET
Install an Cat ET and the Communication Adapter Tool to the Service Tool Connector.
Turn the engine control switch to the ON position.
Operate the Ride Control Switch and checking the status on the Cat ET.Expected Result:The correct status of the ride control switch is "AUTO" when the switch is in the UP position. The correct status of the switch is "OFF" when the switch is in the CENTER position. The correct status of the switch is "ON" when the switch is in the DOWN position. Results:
OK - The switch is operating normally.STOP
Not OK - Proceed to next Step 3.Test Step 3. Short Wires At SwitchNote: Record switch wiring before removing wires for correct reconnection.
Disconnect the wires from the ride control switch.
Short F703-GY and 998-BR. Leave F704-OR open.
Turn the engine control switch to the OFF/RESET position. Then turn the engine control switch to the ON position.
Observe the status on the Cat ET.
Disconnect F703-GY and 998-BR. Short F704-OR and 998-BR.
Turn the engine control switch to the OFF/RESET position. Then turn to the ON position.
Observe the status on the Cat ET.
Short F703-GY, F704-OR and 998-BR
Turn the engine control switch to the OFF/RESET position. Then turn to the ON position.
Remove wire short.Expected Result:The correct status of the ride control switch will read "AUTO" when F703-GY and 998-BR are shorted and wire F704-OR is Open.The correct status of the ride control switch will read "ON" when F704-OR and 998-BRare shorted and wire F703-GY is Open.The correct status of the ride control switch will read "OFF" when F703-GY, F704-OR and 998-BR are shorted.Results:
OK - The ECM and the wire harness are OK. Repair: Replace the switch.STOP
Not OK - There is