5/38321

Fault code 5/38321





Malfunction indicated
IAC valve malfunctioning

Faulty symptom
Poor running when idling.

Test procedure, LH 2.4.2

1 With the ignition switch in the Drive position, enter command code 553 on the ISAT. Check whether the IAC valve is working (1 Hz) by listening to it.

2 With the ignition switch in the Drive position, check whether battery voltage is present across pin 2 of the IAC valve connector and a good ground.

If it is not, check the BU/WH+GY/RD lead between pin 2 of the IAC valve and pin 87 of the main relay for continuity/shorting.

3 With the ignition switched off and the IAC valve connector unplugged, measure the resistance of both valve windings across pins 1 and 2 and pins 2 and 3.

The resistance of each winding should be 10-15 ohms.

If it is not, fit a new IAC valve.

4 Check the BU/WH lead between pin 33 of the control module and pin 1 of the IAC valve and the GN/GY lead between pin 15 of the control module and pin 3 of the IAC valve for continuity / shorting.

5 Try a new control module.