Specifications

AIR INJECTION SYSTEM - CARBURETEDArticle Text (p. 5)

1984 Mazda RX7For iluvmyrx7.com

Fig. 4: Testing Choke Switch and Choke Magnet

CHOKE RELAY

Disconnect the connector from the relay. Check the continuity

between the numbered terminals using an ohmmeter. With battery voltage

applied between terminals 6 (positive) and 5 (negative), there should

be continuity between 3 and 4 and no continuity between 1 and 2. With

no power applied, there should be continuity between 1 and 2 and no

continuity between 3 and 4.

Fig. 5: Checking Choke Relay

HEAT HAZARD SENSOR

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).

3) Place sensor and thermometer (wrapped in aluminum foil) in

container filled with oil. Place a second thermometer in container of

oil. See Fig. 6.

4) Connect a battery and test lamp to sensor connector. Test

lamp should glow. Gradually heat oil. Test lamp should go OFF when

temperature inside aluminum foil is 248-284

F (120-140

C). If sensor

does not respond as outlined, replace heat hazard sensor.

NOTE: Do not heat oil above 302

F (150

C).