System Function Test

NOTE: Actuator on turbocharged models can not be checked using ACC Tester (49 9200 010). It must be checked using an ohmmeter. SeeFig 2 .

Test system with ACC Tester (49 9200 010). SeeFig 1 . Items (main switch, actuator-VAC, actuator-VENT 2, actuator-VENT 1, clutch/brake switch, combination/inhibitor switch (automatic transaxle models), and generator) are verified by check lights on tester.

Fig 1: Cruise Control Tester (49 9200 010) During tests, generator light may be on or off. Courtesy of Mazda Motors Corp.

Tester also has 2 switches, a check switch and a slide switch. Check switch checks actuator operation with engine running. When this switch is held on with engine running, engine speed is increased and held at 2000-3000 RPM. If RPMs do not come up, adjust free play of actuator inner cable. Free play is .004-.012" (1.0-3.0 mm). On RX7 models, slide switch should be moved to "H" position before check switch is used. On all other models, slide switch should be in "L" position before check switch is used.

NOTE: When installing ACC tester, turn ignition and main switch off. When performing all testing steps, main and ignition switches must be in the "ON" position. Generator light can be in the "ON" or "OFF" position during testing.

When testing main switch continuity, all lights except clutch/brake switch and combination/inhibitor switch (manual transaxle, light off) should be on. If all lights are off, check fuse, connectors, ignition, and main switches.
To test inhibitor switch continuity on models with automatic transaxles, depress brake pedal and shift into "D". All lights except clutch/brake switch and combination/inhibitor switch should be on. If combination/inhibitor switch light is on, check wiring and switch.
To test brake switch continuity, shift lever to "D" (automatic transaxle models) and depress brake pedal. All lights except combination/inhibitor switch should be on. If clutch/brake switch light is off, check switch and wiring.
To test clutch switch continuity (manual transaxle models), depress clutch pedal. On all models, see step 3) for correct lighting response. If clutch brake switch light is off, check switch and wiring.
To test "SET", "COAST", or "RESUME" position of combination switch, shift lever to "D" (automatic transaxle only) and turn switch to appropriate position. All lights except clutch/brake switch light should be on. If combination/inhibitor switch light is off, check appropriate switch position and wiring.
Start engine and place shift lever in "N" (automatic transmission models). All lights except clutch/brake switch should be on. For manual transmission models, combination switch should be off. Test actuator operation by setting slide switch to "H". Then turn check switch on and hold.
Engine speed should increase to 2000-3000 RPM. All lights should be out except main switch and combination/inhibitor switch on automatic transmissions only (light will be out on manual transmissions). VAC light should go from off to on.
To check speed sensor output, drive vehicle slowly. All lights except the clutch/brake and the combination/inhibitor switch should be on. If generator light does not flash, speed sensor or wiring is faulty.
On all models, check actuator solenoid resistance. Resistance should be between 25 to 35 ohms on all models except RX7. RX7 resistance readings should be between 23 and 40 ohms while checking terminals a-c, b-c and c-d. Actuators on turbocharged 626 models should have about 20 ohms of resistance between terminals a-c. SeeFig 2 .

Fig 2: Inspecting Actuator Solenoid On all models except RX7, check terminals a-b, a-c, and a-d. Courtesy of Mazda Motors Corp.

Fig 3: Inspecting Actuator Solenoid for Mazda RX7

Courtesy of MAZDA MOTORS CORP.