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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Linear Air-Fuel Ratio Sensor Check

LINEAR AIR-FUEL RATIO SENSOR CHECK







1. Disconnect the linear air-fuel ratio sensor connector and connect special tool MB991658 to the connector on the linear air-fuel ratio sensor side.
2. Measure the resistance between terminal No. 2 and terminal No. 3.

Standard value: 2.3 - 4.2 ohms [at 20 °C (68 °F)]

3. If the resistance deviates from standard value, replace the linear air-fuel ratio sensor.