ISM, ISMe, and QSM11 – Low Idle Adjust Switch Does Not Work

Symptom Tree  t099

This is symptom tree t099
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the Troubleshooting and Repair Manual Electronic Control System ISM and QSM11 Engines, Bulletin 3666266 or the Troubleshooting and Repair Manual CM870 Electronic Control System ISM Engines, Bulletin 4021381.

 

Intake manifold air temperature is below specification

Refer to the Coolant Temperature is Below Normal symptom tree.

 

Low-idle adjust switch and circuit is malfunctioning

Check the idle adjust switch and circuit. Refer to Procedures 019-052 and 019-053 in the Troubleshooting and Repair Manual Electronic Control System ISM and QSM11 Engines, Bulletin 3666266 or the Troubleshooting and Repair Manual, CM870 Electronic Control System ISM Engines, Bulletin 4021381.

 
Last Modified:  05-Jan-2004