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.
Output Speed Sensor Circuit Check (2WD - "C" & "K" Series): Notes
The output sensor circuit consists of a magnetic induction-type sensor, digital ratio adapter located in the instrument cluster, and wiring. Gear teeth pressed on the outside diameter of the output carrier assembly induce an alternating current in the sensor.
This current is transmitted to the instrument cluster, where it is passed on to the PCM. The digital ratio adapter compensates for various axle ratios, and converts the signal to a square wave for use by the speedometer, cruise control and anti-lock brake system.
- This test verifies output speed sensor voltage at PCM.
- This test directly verifies operation of output speed sensor.
- This test checks circuits No. 821 and 822 up to the instrument cluster.
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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.
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