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ISB/ISBe Series Engines – Low Idle Adjust Switch Does Not Work

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Symptom Tree  t099

This is symptom tree
Cause Correction

Engine idle speed is set at either the minimum or the maximum allowable value

The idle adjust switch will not adjust the idle speed outside the allowable range. Refer to Procedure
019-052.
 

Low-idle adjust switch feature is not enabled

Check the low-idle adjust switch feature with an electronic service tool. Refer to Procedure
019-078.
 

Low-idle adjust switch and circuit is malfunctioning

Check the idle adjust switch and circuit. Refer to Procedures
019-052 and
019-053.
 
Last Modified:  09-Apr-2007
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