ke8: Check ISC Circuit for Short to Ground
| Steps | _Key Off, wait 10 seconds
_Breakout box installed, processor disconnected _ISC solenoid disconnected _DVOM on 200,000 ohm scale _Measure resistance between Test Pin 21 and Test Pins 40, 46 and 60 at the breakout box. |
| Result | Is any resistance less than 10,000 ohms? |
| Direction | YES
Service short circuit. Remove breakout box. Reconnect processor and ISC solenoid. Rerun Quick Test NO GO to Continue |
| Component | Idle Speed Controller/Idle Bypass Valve |
| Description | The
ISC is used to control engine idle speed and is controlled by the EEC.
The ISC allows the EEC to control the engine RPM by allowing intake air
flow around the throttle plate.
The ISC has the following functions: Cold engine fast idle No accelerator pedal effort required during engine cranking Dashpot function to help prevent engine stalling upon de-accleration Over temperature idle boost Engine idle load correction |
| Location | Mounted onto the throttle body. Cylinder shape device. |
| Wire Colors | Red
Grey with White stripe |
| Image |  |