ELECTRICAL 108 8.10.12 INERTIA SWITCH An inertia switch is used to sense a sudden deceleration or acceleration, which normally occurs during collision. FUNCTION: In normal condition, the Inertia switch will be open. If the vehicle experiences a sudden deceleration or acceleration as in case of a collision, the inertia switch will be closed. When it is closed, it sends a signal to BCM. Upon receiving the signal, the BCM does the following 1. Switch ON the turning indicators. 2. Switch on the roof lamps. 3. Unlock the doors. The Inertia switch can be reset by pressing it on the top. LOCATION: It is located on Co-driver side behind the ‘A’ pillar lower trim. INERTIA SWITCH RESETTING PROCEDURE 1. Remove the lower A pillar trim. (Refer body section) 2. Reach out for the Inertia Switch. PINOUT PIN DESCRIPTION 1 Not Connected 2 Signal to BCM 3 Supply INSPECTION In the normal condition there should be no continuity between pin 2 and pin 3. Give one vigorous shake to the inertia switch and check the continuity between pin 2 and pin 3 it should be around 320 M Ohms. ! CAUTION Press the reset button before installing.
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