Electro Chromic Mirror System: Inspection

INSPECT ELECTRO CHROMIC INNER MIRROR OPERATION
1. Connect the battery positive (+) lead to terminal 1 and the battery negative (-) lead to terminal 4.
2. Connect the voltmeter positive (+) lead to terminal 2 and the voltmeter negative (-) lead to terminal 3.
3. Attach a black colored tape to the forward sensor to prevent it from sensing.
4. When the mode is turned to AUTO, check that indicator light comes on.
5. Light up the mirror with an electric light, and check that there is a battery positive voltage and the mirror surface changes "bright" to "dark".
If the operation is not as specified, replace the inner mirror.

Fig 1: Attaching Black Colored Tape To Forward Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT ELECTRO CHROMIC INNER MIRROR CIRCUIT

Disconnect the connector from the mirror and inspect the connector on the wire harness side, as shown.

Fig 2: Inspecting Connector On Wire Harness Side

G03375645

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

SPECIFIED CONDITION

Tester connection	Condition	Specified condition
4 - Ground	Always	Continuity
1 - Ground	Ignition switch LOCK or ACC	No voltage
1 - Ground	Ignition switch ON	Battery positive voltage

If the circuit is not as specified, inspect the circuits connected to other parts.

INSPECT ELECTRO CHROMIC OUTER MIRROR OPERATION
1. Disconnect the outer mirror connector.
2. Connect the positive (+) lead from the dry cell battery to terminal 2 and its negative (-) lead to terminal 3, then check that the mirror surface changes to "dark".
3. Check the mirror turns to "bright" after disconnecting the battery.
If the operation is not as specified, replace the mirror assembly.

Fig 3: Checking Mirror Turns To "Bright"
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002