Heat Hazard Sensor Test; Testing Switching Solenoid Valve - Mazda 1983 RX7 Service Manual

speed and watch voltmeter.
3) Voltmeter should read near 12V when engine speed is
1000-1200 RPM. Disconnect No. 1 water temperature switch (located
behind alternator) and connect a jumper wire between both terminals
in connector.
4) Pull out choke knob and check that voltmeter reads near
12V. Push choke knob back in. Remove jumper wire from throttle sensor
connector and reconnect connector.
5) Slowly increase engine speed from idle. Voltmeter should
read near 12V at any engine speed. Quickly accelerate engine; there
should be NO current flow to switching valve. If switching valve does
not respond as outlined, replace switching solenoid valve.
Fig. 5:

Testing Switching Solenoid Valve

HEAT HAZARD SENSOR TEST

1) Turn ignition on; "Overheat Exh. System" warning light
should glow. Start engine and warning light should go out. Remove
passenger seat, fold back carpeting and disconnect heat hazard sensor
connector.
2) Warning light should glow when jumper wire is connected
to both terminals of the connector. If warning light does not respond
as outlined, remove and test sensor. Wrap sensor and a thermometer in
aluminum foil (electrical connector must be exposed for access).
AIR INJECTION SYSTEM
Article Text (p. 6)
1983 Mazda RX7
For www.iluvmyrx7.com
Copyright © 1998 Mitchell Repair Information Company, LLC
Sunday, August 26, 2001 04:57PM