WA. Checking the Throttle Body (TB) Adjustment

WA. Checking the throttle body (TB) adjustment

WA1




Checking adjustment
- Warm up the engine.
- Connect an accurate tachometer.
- Engine idling.
- Gear selector in the P position.
- A/C off.
- Pinch the IAC valve hose with a hose clip.
Engine speed should be below 500 rpm. It is not a fault if the engine stops.

If this value is OK:
^ Remove the hose clip.
^ Return to fault tracing where it was interrupted.

If the reading is incorrect:
^ Adjust idle speed WA2.

WA2




Adjusting idle speed
- Loosen the throttle spindle adjustment screw lock nut.
- If not running, start engine.
- Turn the adjustment screw until idle speed is 480-520 rpm.
- Switch off the engine.
- Tighten the lock nut. Hold the adjustment screw so that it does not turn.
^ Continue with Checking WA3.

WA3




Checking
- Open the throttle and check the gap between the throttle lever and the adjustment screw with a feeler gauge.
With a 0.45 mm feeler gauge there should be no click from the idle switch when the throttle is closed.
With a 0.15 mm feeler gauge there should be a click from the idle switch when the throttle is closed.

If the gap is OK:
^ Return to fault tracing where it was interrupted.

If a gap is incorrect:
^ Adjust TP switch in accordance with WC. Adjusting the TP switch. WC. Adjusting the TP Switch