HARNESS AS-CHASSIS 4842353 - Caterpillar

Probable Causes
Diagnostic codes
Multi-position throttle switch
CAN data linkRecommended Repairs
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 1
Troubleshooting Test Steps    Values    Results    
1. Diagnostic Codes
A. Establish communication between the electronic service tool and the Electronic Control Module (ECM). Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
   
Codes
   
Result: There are active codes.
Troubleshoot any active codes before continuing with this procedure.
Result: There are no active codes.
Proceed to Test Step 2.
   
2. Multi-position Throttle Switch
Note: When the engine is operating and the fault occurs, the configuration of the throttle will not change. Check the configuration of the throttle only if the engine has never run.
A. Troubleshoot the multi-position throttle switch. Refer to Troubleshooting, "Switch Circuit - Test".
   
Throttle Switch
   
Result: The multi-position throttle switch is faulty.
Repair or replace the multi-position throttle switch.
Result: The multi-position throttle switch is OK.
Proceed to Test Step 3.
   
3. CAN Data Link
A. If a fault is suspected in the CAN data link, refer to Troubleshooting, "CAN Data Link- Test".
   
Injector Solenoid Test or Fuel System Verification Test
   
Result: The CAN data link or the associated wiring is faulty.
Repair or replace the CAN data link or the associated wiring.
Result: The Can data link and the associated wiring are OK.
Contact the Technical Communicator at a Cat dealer.