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.
2.Check the connector for damage, and terminals for deformation.
3.Check the headlamp support panel for deformation.
warning Always replace the sensor with a new one if the resistance shows a short or open circuit.
caution Do not insert a test probe into the terminal from its front side directly as the connector contact pressure may be weakened.


4.Measure the resistance of front impact sensor at the intermediate connector (the front impact sensor is connected).
(1) Disconnect intermediate connector C-13.
(2) The resistance between the terminal 3 and 10, or between the terminal 4 and 5 on the backside of intermediate connector (male side) <LHD>
(3) The resistance between the terminal 5 and 6, or between the terminal 16 and 17 on the backside of intermediate connector (male side) <RHD>
note Prior to that check, confirm the wiring harness between the front impact sensor and intermediate connector, and repair if necessary.
Standard value: 820 ± 82 Ω


5.Measure the resistance of front impact sensor at the intermediate connector (the front impact sensor is connected).
(1) Disconnect intermediate connector C-13.
(2) Continuity between the terminal 3, 4, 5 and 10 on the backside of intermediate connector (male side) and body earth <LHD>
(3) Continuity between the terminal 5, 6, 16 and 17 on the backside of intermediate connector (male side) and body earth <RHD>
note Prior to that check, confirm the wiring harness between the front impact sensor and intermediate connector, and repair if necessary.
OK: Open circuit


6.Measure the voltage of front impact sensor at the intermediate connector (the front impact sensor is connected).
(1) Disconnect intermediate connector C-13.
(2) Connect the negative battery cable.
(3) Turn the ignition switch to "ON" position.
(4) Voltage between the terminal 3, 4, 5 and 10 on the backside of intermediate connector (male side) and body earth <LHD>
(5) Voltage between the terminal 5, 6, 16 and 17 on the backside of intermediate connector (male side) and body earth <RHD>
note Prior to that check, confirm the wiring harness between the front impact sensor and intermediate connector, and repair if necessary.
OK: 1 V or less
7.Check the headlamp support pane for deformation and rust.