ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – Engine Will Not Shut Off

Symptom Tree  t081

This is symptom tree t081
Cause Correction

Keyswitch circuit is malfunctioning

Check the vehicle, equipment, or vessel keyswitch circuit. Refer to Procedure 019-064 in Troubleshooting and Repair Manual, CM850 Electronic Control System, ISC and ISL Engines, Bulletin 4021416, or Procedure 019-064 in Troubleshooting and Repair Manual, ISC, QSC8.3 and ISL Engines, Bulletin 3666271.

 

Starting aid is malfunctioning

Check for correct operation of cold-starting aid. Refer to Procedures 005-008 and 010-029.

 

Turbocharger oil seal is leaking

Check the turbocharger compressor and turbine seals. Refer to Procedures 010-033.

 

Engine is running on fumes drawn into the air intake

Check the air intake ducts. Locate and isolate the source of the fumes. Repair as necessary. Refer to the OEM service manual.

 

Electronic control module (ECM) is malfunctioning

Replace the ECM. Refer to Procedure 019-031 in Troubleshooting and Repair Manual, CM850 Electronic Control System, ISC and ISL Engines, Bulletin 4021416, or Procedure 019-031 in Troubleshooting and Repair Manual, ISC, QSC8.3 and ISL Engines, Bulletin 3666271.

 
Last Modified:  29-Jul-2005