KE - Test Notes

NOTE: You should enter this Pinpoint Test only when you have been directed here from Quick Test or Pinpoint Test S.


REMEMBER


To prevent the replacement of good components, be aware that the following non-EEC areas may be at fault.


- Engine not up to operating temperature

- Engine over operating temperature

- A/C input (electrical problems)

- Throttle Speed Control Linkage

- Throttle sticking or linkage binding



This Pinpoint Test is intended to diagnose only the following:




- RPM in Self-Test only

- ISC Solenoid

- Harness circuits: ISC and VPWR

- Processor assembly


DESCRIPTION

The Idle Speed Control (ISC) solenoid is used to control engine idle speed and dashpot functions. The ISC solenoid is mounted on the body and allows air to bypass the throttle plate. The amount of air allowed to bypass is determined by the processor and controlled by a duty cycle signal.