Cruise Control Systems: Adjustments
Test system with ACC Checker (49 9200 010). SeeFig 1 . Items (main switch, actuator-VAC, actuator-VENT 2, actuator-VENT 1, clutch/brake switch, combination/inhibitor switch, and generator) are verified by check lights on checker.
Checker also has 2 switches, a check switch and 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 to 2000-3000 RPM. If RPMs do not come up, adjust free play of actuator inner cable. Free play for RX7 is .28-.51" (7-13 mm) for 12A engines and .24-.43" (6-11 mm) for 13B engines. On 626 models, free play is .20-.39" (5-10 mm) for gas engines and .24-.43" (6-11 mm) for diesel engines. Slide switch should be moved to "H" position before check switch is used.
- When testing main switch continuity, all lights except clutch/brake switch and combination/inhibitor switch should be on. If all lights are off, check fuse, connectors, ignition, and main switches.
- To test inhibitor switch continuity, depress brake pedal and shift into "D". See step 1) for correct lighting response. If combination/inhibitor light is on, check wiring and switch.
- To test brake switch continuity, shift lever to "D" and depress brake pedal. All lights except combination/inhibitor switch should be on. If clutch/brake switch light is off, check this switch and wiring.
- To test clutch switch continuity, depress clutch pedal. See step 3) for correct lighting response. If clutch/brake switch light is out, check clutch switch and wiring.
- To test "SET", "COAST", or "RESUME" position of combination switch, shift lever to "D" and turn switch to appropriate position. Clutch/brake switch light should be off. If combination/inhibitor switch light is off, check appropriate switch and wiring.
- Start engine and place shift lever in "N". For automatic transmission, all lights except combination/inhibitor switch should be on. For manual transmission, this light 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, and all lights should be out except 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 clutch/brake and combination/inhibitor switch should be on. If generator light does not flash, speed sensor or wiring is faulty.