Inspection Procedure
WIRING DIAGRAM
INSPECTION PROCEDURES
1. CHECK OPERATION OF VSV FOR EXHAUST BYPASS VALVE.
(a) Remove VSV.
(b) Disconnect VSV connector.
(c) Measure resistance between terminals.
Resistance at 20°C (68°F): 22 - 26 Ohms
(d) Measure resistance between each terminal and the body.
Resistance: 1 M-Ohm or higher
(e) Check operation of VSV when battery positive voltage is applied to the VSV terminals.
Open passage from port E to port F.
(e) Check operation of VSV when battery positive voltage is released to the VSV terminals.
Closed passage from port E to port F.
^ If OK go to step 2.
^ If not OK replace VSV for Exhaust Bypass Valve.
2. CHECK OPERATION OF VSV FOR EXHAUST GAS CONTROL VALVE.
(a) Remove VSV.
(b) Disconnect VSV connector.
(c) Measure resistance between terminals.
Resistance at 20°C (68°F): 38.5 - 44.5 Ohms
(d) Measure resistance between each terminal and the body.
Resistance: 1 M-Ohm or higher
(e) Check operation of VSV when battery positive voltage is applied to the VSV terminals.
Open passage from port E to port F.
(e) Check operation of VSV when battery positive voltage is released to the VSV terminals.
Open passage from port E out through air filter.
^ If OK go to step 3.
^ If not OK replace VSV for exhaust gas control valve.
3. CHECK OPERATION OF VSV FOR INTAKE AIR CONTROL VALVE.
(a) Remove VSV.
(b) Disconnect VSV connector.
(c) Measure resistance between terminals.
Resistance at 20°C (68°F): 38.5 - 44.5 Ohms
(d) Measure resistance between each terminal and the body.
Resistance: 1 M-Ohm or higher
(e) Check operation of VSV when battery positive voltage is applied to the VSV terminals.
Open passage from port E to port F.
(e) Check operation of VSV when battery positive voltage is released to the VSV terminals.
Open passage from port E out through air filter.
^ If OK go to step 2.
^ If not OK replace VSV for intake air control valve.
4. CHECK VOLTAGE BETWEEN TERMINALS VSV1, VSV2, VSV3 OF ECM AND BODY GROUND.
(a) Connect the Check Harness A.
(b) Turn ignition switch ON.
(c) Measure voltage between terminal VSV1, VSV2, VSV3 of ECM connector and body ground.
Voltage: 9 - 14 volts
^ If OK check actuator. (for exhaust bypass valve, exhaust gas control valve, intake air control valve)
^ If not OK go to step 5.
5. CHECK FOR OPEN AND SHORT IN HARNESS AND CONNECTOR BETWEEN EFI MAIN RELAY AND ECM.
^ If OK check and replace ECM.
^ If not OK repair or replace harness or connector.