Air By-Pass Solenoid Valve (Turbo)
- Disconnect coolant thermo sensor and connect a 2000-ohm resistor to the terminals of thermo sensor connector. Using a voltmeter, connect one probe to Brown/Yellow terminal of air by-pass solenoid valve. Connect other probe to ground. Start and run engine, checking that voltage drops from zero volts to 12 volts after engine has run 17 seconds.
- Disconnect air by-pass solenoid valve connector. Using a volt/ohmmeter, attach probes to terminals of air by-pass solenoid valve connector. Check that there is 16.2-19.8 ohms resistance. See Fig 2 . If not, replace air by-pass solenoid valve.