HOW CAN I TEST THIS. I TOOK THIS OFF AND CLEANED IT. I WOULD LIKE TO TEST IT BEFORE BUYING NEW ONE
Feb 3, 2010 at 2:20 PM
1999 Chevy Van IDLE AIR CONTROL VALVE
1999 CHEVROLET VAN
VON101758
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Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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Without a special IAC driver or GM tech II scanner, this is all you can check, other than codes.
10. Remove IAC driver from IAC valve. Using DVOM, measure resistance between IAC valve terminals "A" and "B". See Fig. 7 . Also, measure resistance between IAC valve terminals "C" and "D". If resistance is 40-80 ohms on both measurements, go to next step. If resistance is not 40-80 ohms on both measurements, go to step 22. 11. Using DVOM, measure resistance between IAC valve terminals "B" and "C". See Fig. 7 . Also, measure resistance between IAC valve terminals "A" and "D". If resistance is infinite on both measurements, check for a non-IAC system problem (i.e. vacuum leak, sticking throttle cable, fuel system lean or rich, throttle body, poor electrical connections, faulty PCV valve, A/C compressor circuits). If resistance is not infinite on both measurements, go to step 22. Step 22= replace IAC!
Feb 3, 2010 at 3:11 PM
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