Testing Vacuum Control Solenoid Valve - Mazda 1983 RX7 Service Manual

0V at idle. When transmission is shifted into any forward or reverse
gears, voltmeter should read near 12V.
3) Increase engine speed to 2000 RPM. Slowly decrease engine
speed from 2000 RPM and watch voltmeter. Current should stop flowing
to solenoid terminals when engine speed is 1000-1200 RPM.
4) Stop engine and disconnect No. 1 water temperature switch
connector (located behind alternator). Connect a jumper wire between
terminals of water temperature connector. Start engine and set engine
speed at 2000 RPM with choke knob.
5) Unplug connector from No. 2 water temperature switch
(located on radiator). Check that the voltmeter reads near 12V when
the connector is unplugged from the switch. Disconnect jumper wire
and plug in No. 1 water temperature switch connector.
6) Quickly decelerate engine speed from 3000 RPM. The
voltmeter should read near 0V during deceleration and at idle speed.
Trailing vacuum control solenoid valve (Green dot) is tested in the
same manner.
NOTE: Before replacing vacuum control solenoid valve, check
auxiliary control unit, No. 2 water temperature switch,
choke switch and choke relay as described in "Mazda RX7
Auxiliary Control Device," article in this section. Also
check throttle sensor as described in "Mazda RX7
Deceleration Control System," article in this section.
Fig. 1:

Testing Vacuum Control Solenoid Valve

Voltmeter and tachometer required for tests.
SPARK CONTROL SYSTEM
Article Text (p. 2)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 04:59PM