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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Impact Sensor: Testing and Inspection

INSPECTION

WARNING: If a dent, crack, deformation or rust is detected, replace with a new sensor.

1. Check the front impact sensor for dents, cracks, deformation or rust.

WARNING: If the resistance value shows the short-circuit or the open-circuit, be sure to replace the front impact sensor with a new one.







2. Check the short-circuit or the open-circuit between the front impact sensor terminals.
When short-circuit: 1 Ohm and less
When open-circuit: 1 mega Ohm and over







3. Check for continuity between the terminal and the bracket. When there is continuity, it shows insufficient insulation of the sensor. Replace the sensor with a new one.
4. Check for deformation and rust on the radiator support panel.