Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Input Speed Sensor Inspection




Input Speed Sensor Inspection




1. Measure the resistance of each input speed sensor between terminals.




2. If the resistance value is not between the minimum and maximum resistance plot lines, then measure the sensor resistance at 20°C (68°F).
Important: The resistance of the sensor can become infinity ohm when the resistance measurement is made at high temperatures.

3. If both resistance measurements are not between the minimum and maximum resistance plot lines, replace the input speed sensor.