AUTO-DIMMING MIRROR INSPECTION

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1. Remove the rain sensor. (vehicles with auto light/wiper system) (See RAIN SENSOR REMOVAL/INSTALLATION.)

2. Measure the voltage at each terminal.

• If the voltage is not as specified in the Terminal Voltage Table (Reference), inspect the parts under “Inspection item (s)” and related wiring harnesses.

― If the system does not work properly even though the inspection items or related wiring harnesses do not have any malfunction, replace the auto-dimming mirror.

Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Measured condition

Voltage (V)

Inspection item(s)

A

Power supply (IG1)

•  Ignition switch

•  METER 15 A fuse

Switch the ignition to ON

B+

•  Ignition switch

•  METER 15 A fuse

•  Related wiring harnesses

Switch the ignition to Off

1.0 or less

B

R position signal

Back-up light switch/TR switch

R position

B+

•  Back-up light switch/TR switch

•  Related wiring harnesses

Other than R position

1.0 or less

D

GND

Body ground

Under any condition

1.0 or less

•  Related wiring harnesses

Terminal	Signal name	Connected to	Measured condition	Voltage (V)	Inspection item(s)
A	Power supply (IG1)	• Ignition switch • METER 15 A fuse	Switch the ignition to ON	B+	• Ignition switch • METER 15 A fuse • Related wiring harnesses
A	Power supply (IG1)	• Ignition switch • METER 15 A fuse	Switch the ignition to Off	1.0 or less
B	R position signal	Back-up light switch/TR switch	R position	B+	• Back-up light switch/TR switch • Related wiring harnesses
B	R position signal	Back-up light switch/TR switch	Other than R position	1.0 or less
D	GND	Body ground	Under any condition	1.0 or less	• Related wiring harnesses