K 30 P/U 4WD V6-262 4.3L (1985)
Wiring Diagram for Chart C-2T-1 - Idle Speed Control Check "Throttle Kicker"
CHART C-2T-1 - IDLE SPEED CONTROL CHECK "THROTTLE KICKER"
Circuit Description:
The throttle kicker is manifold vacuum operated and extends under the following conditions:
^
Coolant temperature below 85~C (185~F).
^
For 30 seconds after starting engine, if coolant temperature is above 85~C (185~F).
^
If A/C equipped, A/C "on" and pressure cycling switch closed (clutch "ON").
^
If power steering equipped, full steering turn will open switch and solenoid will energize (with A/C "off").
Test Description:
1.
Checks ECM control of solenoid and for an open in relay coil circuit.
2.
Checks to see that power steering switch opens, and the relay contact circuit is not open.
3.
Checks for open relay coil circuit to ECM.
4.
Checks for open ignition circuit to solenoid.
5.
Checks vacuum source to solenoid, then checks for faulty throttle kicker.
