Trunk won’t unlock or open
Description of the defects
(1) The rubber switch knob on the rear gate or boot electromagnetic opener is made of an unsuitable material and, due to ozone deterioration, the elasticity of the rubber may deteriorate, causing the knob to crack with repeated switch operation.
If the switch continues to be used in this condition, rainwater or other moisture may enter the switch and corrode the contacts, resulting in poor continuity, which may prevent the rear gate or boot from unlocking and opening even if the switch is operated.
In addition, if continuity is temporarily lost, the rear gate or boot could be unlocked, but it will not be unlocked and opened while the vehicle is in motion.
(2) On vehicles fitted with Advanced Keyless Entry, the rubber switch knob of the request switch on the door handle is made of an inappropriate material, and the elasticity of the rubber may decrease due to ozone deterioration, causing the knob to crack with repeated switch operations.
If the switch continues to be used as it is, rainwater or other moisture may penetrate the switch and corrode the contacts, resulting in poor continuity, which may prevent the door from being locked or unlocked even if the switch is operated.
However, the door can still be locked and unlocked using the key. If the continuity of the contacts becomes temporarily unstable, there is a risk that the keyless entry warning light in the meter may illuminate or it may be difficult to start or stop the engine, but this will not cause the engine to stall or the engine speed to rise.
Improvement details
(1) All vehicles will have the electromagnetic opener body replaced with a countermeasure.
(2) All vehicles will have the request switch knob inspected and if the knob is cracked, the request switch itself will be replaced with a countermeasure. If there are no cracks, the switch knob will be replaced with a countermeasure.
Chassis number of target vehicles
Mazda2
DE3AS-100011～DE3AS-105463
DE3FS-100037～DE3FS-177172
DE5FS-100027～DE5FS-118332
Automotive maintenance cannot determine the cause based on symptoms alone.
Be sure to perform diagnosis and inspection before determining the cause of the failure.
