Operation CHARM: Car repair manuals for everyone.

Road Testing


1. Raise and support rear of vehicle on rear wheel drive models, or front of vehicle on front wheel drive models and block the opposite set of wheels. Never attempt to use the vehicle bumper jack for a test of this type.
2. Start engine and shift transmission to Drive.
3. Turn on the speed control system. If any time during the following steps the system should appear to go out of control and overspeed, be prepared to turn speed control system off at once with the ``Off'' switch or ignition switch.
4. Accelerate and hold at 35 m.p.h..
5. Press and release ``Set'' button. Hold foot pressure very lightly on accelerator pedal.
6. Press ``Off'' button. The engine should decelerate to idle. Stop drive wheels with service brakes.
7. Press ``On'' button, accelerate and hold speed at 35 m.p.h..
8. Press and hold ``Set-Acc'' button. Slowly remove foot from accelerator. The engine RPM should gradually increase.
9. When the speed reaches 50 m.p.h., release ``Set-Acc'' button. The vehicle should maintain 50 m.p.h. for a short time before surging begins.
10. Press ``Coast'' button and hold. The engine should idle. Slow drive wheels to 35 m.p.h..
11. Release ``Coast'' button. Speed should set in and surging should soon start.
12. Apply brake pedal. The system should shut off, engine should decelerate to idle and wheels should stop turning.
13. On models equipped with ``Resume,'' set speed at 50 m.p.h.. Decelerate to 35 m.p.h. and maintain 35 m.p.h. with the accelerator. Depress and release ``Resume'' button. The speed should return to 50 m.p.h..