Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test E: Set/ACCEL Switch Is Inoperative
Turn ignition switch to OFF position. Disconnect speed control servo Black 10-pin harness connector C122 located near master cylinder. While pressing SET/ACCEL switch and rotating steering wheel from stop-to-stop, measure resistance between speed control servo Black 10-pin harness connector C122 terminals No. 5 (Light Blue/Black wire) and No. 6 (Dark Green/Orange wire). See Figure. If resistance is 612-748 ohms, replace speed control servo. See SPEED CONTROL SERVO under REMOVAL & INSTALLATION. Retest system operation. If resistance is not 612-748 ohms, replace speed control switch. See SPEED CONTROL SWITCHES under REMOVAL & INSTALLATION. Retest system operation.
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Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.