general information - Martin Nez

4-40 FI SYSTEM DIAGNOSISStep 31) Turn the ignition switch to OFF.2) Remove the IAP sensor.3) Connect the vacuum pump gauge to the vacuum port of theIAP sensor.Arrange 3 new 1.5 V batteries in series 1 (check that total -voltage is 4.5 – 5.0 V) and connect - terminal to the ground -terminal 2 and + terminal to the VCC terminal 3.4) Check the voltage between Vout 4 and ground. Also, checkif voltage reduces when vacuum is applied up to 400 mmHgby using vacuum pump gauge. (4-41) 09917-47011: Vacuum pump gauge09900-25008: Multi-circuit tester set Tester knob indication: Voltage ()3vIs the voltage OK?3YESNO• G/B, Red or B/Br wire open or shorted toground, or poor 9, A or S connection• If wire and connection are OK, intermittent troubleor faulty ECM.• Recheck each terminal and wire harness foropen circuit and poor connection.• Replace the ECM with a known good one, andinspect it again.If check result is not satisfactory, replace the IAPsensor with a new one.ECM couplers (Harness side)5) After repairing the trouble, clear the DTC using SDS tool.(4-26)