How do you disconnect the IAC valve on a car?
1) With the IAC valve connected, ground the diagnostic (ALDL) terminal (same as you would do to flash trouble codes thru the check engine light). 2) Turn ON the ignition, but do NOT start the engine. Wait at least 30 seconds. 3) With the ignition still on, disconnect the IAC electrical connector.
How to learn idle air volume in Infiniti I30?
Turn ignition switch “OFF” and wait at least 10 seconds. Start engine and warm it up to normal operating temperature. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order. Turn ignition switch “OFF” and wait at least 10 seconds. Start the engine and let it idle for at least 30 seconds.
How does the IAC affect air flow to the engine?
Typically as the IAC’s pintle extends, air flow to the engine is restricted as the air passage is shut off. As it retracts, air flow to the engine is increased as the air passage is opened up. This air passage is a simple bypass for incoming air to take around the throttle blade. Diagnosing problems associated with the IAC aren’t simple.
What should the voltage be for wide open throttle?
If the voltage you get is not within spec, loosen the TPS retaining screws and adjust as necessary. Normal voltage reading for wide open throttle (WOT) is above 4.00 volts. There are trouble codes that are associated with the TPS. One code will set if the TPS voltage is too high when the computer expects to see it lower.
1) With the IAC valve connected, ground the diagnostic (ALDL) terminal (same as you would do to flash trouble codes thru the check engine light). 2) Turn ON the ignition, but do NOT start the engine. Wait at least 30 seconds. 3) With the ignition still on, disconnect the IAC electrical connector.
Turn ignition switch “OFF” and wait at least 10 seconds. Start engine and warm it up to normal operating temperature. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order. Turn ignition switch “OFF” and wait at least 10 seconds. Start the engine and let it idle for at least 30 seconds.
Typically as the IAC’s pintle extends, air flow to the engine is restricted as the air passage is shut off. As it retracts, air flow to the engine is increased as the air passage is opened up. This air passage is a simple bypass for incoming air to take around the throttle blade. Diagnosing problems associated with the IAC aren’t simple.
If the voltage you get is not within spec, loosen the TPS retaining screws and adjust as necessary. Normal voltage reading for wide open throttle (WOT) is above 4.00 volts. There are trouble codes that are associated with the TPS. One code will set if the TPS voltage is too high when the computer expects to see it lower.