Mirror: Overview Toyota Avalon XX30

SYSTEM DESCRIPTION

1. POWER MIRROR CONTROL SYSTEM DESCRIPTION This system has these functions: automatic glare resistant electrochromatic (EC) mirror, electrical remote control type mirror, memory function, foot light function, and rear window defogger-linked mirror defogger.
2. FUNCTION OF MAIN COMPONENT COMPONENTS FUNCTION Components Function Vertical mirror motor Receives signal from memory mirror ECU and adjusts remote control mirror in the vertical direction. Horizontal mirror motor Receives signal from memory mirror ECU and adjusts remote control mirror in the horizontal direction. Mirror defogger Receives signal from defogger relay and starts mirror defogger. EC mirror cell Varies reflection rate of mirror through function of EC elements. Mirror control switch After selecting "R" or "L" switch, control switches change angle of mirror. Mirror signals are sent to memory mirror ECU through body ECU. Mirror master switch Consists of "R" and "L" switch. One must be chosen before mirror control switches can be operated. Mirror position sensor Detects remote control mirror position. This data is detested by memory mirror ECU. Set switch Memory switch When set switch and memory switches are pressed simultaneously, SET, 1 or 2 switch is input to body ECU and remote control mirror position is recorded. Then, when memory switch is pressed, 1 or 2 switch is input to memory mirror ECU and remote control mirror position changes according to memory.
3. SYSTEM OPERATION The remote control mirror has following features: REMOTE CONTROL MIRROR FEATURES Function Outline Ignition switch-linked automatic electrical retractable mirror This function automatically retracts remote control mirrors when ignition switch is turned from ON to LOCK. This feature improves convenience of vehicle by eliminating need to manually operate mirror retract switch after stopping vehicle. Manual electrical retractable mirror This function retracts remote control mirrors when mirror retract switch is pressed. Electrical remote control type mirror When mirror control switch is operated, this function moves mirror surface vertically or laterally to enable driver to attain optimal mirror angle. Setting mirror master switch to "R" position operates right mirror, and to "L" position operates left mirror. Rear window defogger-linked mirror defogger This function automatically turns on mirror defogger when rear window defogger switch is turned on. After 15 minutes have elapsed from time this function has been activated, rear window defogger turns off automatically, and mirror defogger also turns off. Wiper-linked mirror defogger To improve rear visibility in the rain, this system automatically turns on mirror defogger when wiper switch is turned on. Automatic glare-resistant EC mirror This function helps to reduce glare/reflection in inner mirror during nighttime driving for safe driving conditions. Glare/reflection from vehicle headlights behind driver could blind driver and cause dangerous driving conditions. Memory function This function stores adjusted mirror position in driver and front passenger memory mirror ECU.

DESCRIPTION

When the memory mirror ECU receives the signal(s) from the certification ECU through BEAN communication, it illuminates the foot light. The foot light is installed on the bottom of the outer rear view mirror and comes on or does off according to the following conditions.

The light comes on when

1. Doors are unlocked by wireless operation.
2. The key code ID (key code recognition signal) for smart key system matches.
3. The driver's door is manually unlocked with the shift lever is in the P position or the ignition off. (Both driver's and passenger's side come on.)

The light goes off when

1. Doors are locked by wireless operation.
2. Doors are locked by the smart key system.
3. The setting time has elapsed after the light come on.
4. The setting time has elapsed after the driver's or passenger's door is closed while the light is on.
5. The ignition is off and the shift lever is in any position other than P.
6. Doors are locked or unlocked by interlock operation or manual switch.

Scheme 1

Scheme 2

Scheme 3

1. READ VALUE OF INTELLIGENT TESTER Check the ACTIVE TEST for proper functioning of the seat memory switch. OUTER MIRROR CONTROL ECU ACTIVE TEST REFERENCE Item Test Details FOOT LIGHT Illumination operation ON/OFF OK: Foot light comes on OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE NG: GO TO NEXT STEP
2. CHECK WIRE HARNESS (OUTER REAR VIEW MIRROR ASSEMBLY - MEMORY MIRROR ECU) LH: Disconnect the I2 and I8 connectors. Check the resistance of the wire harness side connectors. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition I8-12 - I2-2 Always Below 1 ohm I8-13 - Body ground I8-12 - Body ground 10 kohm or higher RH: Disconnect the H2 and H8 connectors. Check the resistance of the wire harness side connectors. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition H8-12 - H2-2 Always Below 1 ohm H8-13 - Body ground H8-12 - Body ground 10 kohm or higher NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A switch signal of the outer mirror switch is transmitted to the selected outer mirror control ECU by way of the body ECU. Then, the memory mirror ECU activates the mirror motor to move the mirror UP, DOWN, RIGHT and LEFT in response to the inputs.

HINT

The power mirror control system is part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See MULTIPLEX COMMUNICATION -- AVALON ).

Scheme 4

Scheme 5

Scheme 6

1. INSPECT OUTER MIRROR SWITCH ASSEMBLY Remove the outer mirror switch assembly. Measure the resistance between the wire harness connectors. Vertical and horizontal operation RESISTANCE SPECIFIED CONDITION Tester Connection Switch Position Specified Condition 2 - 3 OFF 10 kohm or higher UP 100 ohm DOWN 250 ohm LEFT 470 ohm RIGHT 800 ohm Left or right side operation RESISTANCE SPECIFIED CONDITION Tester Connection Switch Position Specified Condition 1 - 2 L 100 ohm R 10 ohm or less NG: REPLACE OUTER MIRROR SWITCH ASSEMBLY OK: GO TO NEXT STEP
2. CHECK WIRE HARNESS (OUTER MIRROR SWITCH ASSEMBLY - INSTRUMENT PANEL J/B) Disconnect the D4 and D7 connectors. Measure the resistance between the wire harness connectors. Standard resistance RESISTANCE SPECIFIED CONDITION Tester Connection Switch Position Specified Condition D4-1 - D7-12 Always Below 1 ohm D4-2 - D7-3 D4-3 - D7-11 D4-1 - Body ground 10 kohm or higher D4-1 - Body ground D4-1 - Body ground NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A mirror control switch signal and memorized mirror positions are set to the memory mirror ECU. The memory mirror ECU drive the selected mirror UP, DOWN, LEFT and RIGHT in response to the inputs.

HINT

The power mirror control system is part of the large-scale multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See MULTIPLEX COMMUNICATION -- AVALON ).

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check that the outer rear view mirrors. OUTER MIRROR CONTROL ECU: ACTIVE TEST REFERENCE Item Tester Details MIRR UP / DOWN Mirror vertical operation UP / DOWN MIRR RIGHT / LEFT Mirror horizontal operation RIGHT / LEFT OK: Mirror is UP / DOWN or RIGHT / LEFT NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN «PROBLEM SYMPTOMS TABLE»(ref-245162-S22324482542006102400000)
2. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH: Disconnect the I8 connector. Apply battery voltage and check operation of the mirror face. Standard MIRROR FACE OPERATION REFERENCE Measurement Condition Mirror Operation Battery positive (+) --> I8-3 (MV) Battery negative (-) --> I8-2 (M+) Turns upward (A) Battery positive (+) --> I8-2 (M+) Battery negative (-) --> I8-3 (MV) Turns downward (B) Battery positive (+) --> I8-2 (M+) Battery negative (-) --> I8-1 (MH) Turns left (C) Battery positive (+) --> I8-1 (MH) Battery negative (-) --> I8-2 (M+) Turns right (D) If the result is not as specified, proceed to NG-A RH: Disconnect the H8 mirror connector. Apply battery voltage and check operation of the mirror face. Standard MIRROR FACE OPERATION REFERENCE Measurement Condition Mirror Operation Battery positive (+) --> I8-3 (MV) Battery negative (-) --> I8-2 (M+) Turns upward (A) Battery positive (+) --> I8-2 (M+) Battery negative (-) --> I8-3 (MV) Turns downward (B) Battery positive (+) --> I8-2 (M+) Battery negative (-) --> I8-1 (MH) Turns left (C) Battery positive (+) --> I8-1 (MH) Battery negative (-) --> I8-2 (M+) Turns right (D) If the result is not as specified, proceed to NG-B NG-A: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH NG-B: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH OK: GO TO NEXT STEP
3. CHECK WIRE HARNESS (OUTER REAR VIEW MIRROR ASSEMBLY - MEMORY MIRROR ECU) LH: Disconnect the I2 and I8 connectors. Check the resistance of the wire harness side connectors. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition I8-1 - I2-9 Always Below 1 ohm I8-2 - I2-10 Always Below 1 ohm I8-3 - I2-1 Always Below 1 ohm I8-1 - Body ground Always 10 kohm or higher I8-2 - Body ground Always 10 kohm or higher I8-3 - Body ground Always 10 kohm or higher RH: Disconnect the H2 and H8 connectors. Check the resistance of the wire harness side connectors. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition I8-1 - I2-9 Always Below 1 ohm I8-2 - I2-10 Always Below 1 ohm I8-3 - I2-1 Always Below 1 ohm I8-1 - Body ground Always 10 kohm or higher I8-2 - Body ground Always 10 kohm or higher I8-3 - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

When SET and 1 or 2 are pressed, the position sensor detects the mirror position and sends the signal to the memory mirror ECU. Then when position 1 or 2 is pressed, the memory mirror ECU drives the mirror motor based on the memorized sensor positions.

HINT

The power mirror control system is part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See MULTIPLEX COMMUNICATION -- AVALON ).

Scheme 12

Scheme 13

Scheme 14

1. READ VALUE OF INTELLIGENT TESTER Check the DATA LIST for proper functioning of the seat memory switch. OUTER MIRROR CONTROL ECU: DATA LIST REFERENCE Item Switch Position Specified condition MIR POS SEN V Mirror position sensor voltage (Vertical direction) 0 to 5 V MIR POS SEN H Mirror position sensor voltage (Horizontal direction) 0 to 5 V OK: 0 to 5 V is displayed NG: Go to step 2 OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. CHECK WIRE HARNESS (OUTER REAR VIEW MIRROR ASSEMBLY - MEMORY MIRROR ECU) LH: Disconnect the I2 and I8 connectors. Check the resistance of the wire harness side connectors. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection (Symbols) Condition Specified Condition I8-8 - I2-14 Always Below 1 ohm I8-9 - I2-5 Always Below 1 ohm I8-10 - I2-13 Always Below 1 ohm I8-11 - I2-6 Always Below 1 ohm I8-8 - Body ground Always 10 kohm or higher I8-9 - Body ground Always 10 kohm or higher I8-10 - Body ground Always 10 kohm or higher I8-11 - Body ground Always 10 kohm or higher RH: Disconnect the H2 and H8 connectors. Check the resistance of the wire harness side connectors. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection (Symbols) Condition Specified Condition I8-8 - I2-14 Always Below 1 ohm I8-9 - I2-5 Always Below 1 ohm I8-10 - I2-13 Always Below 1 ohm I8-11 - I2-6 Always Below 1 ohm I8-8 - Body ground Always 10 kohm or higher I8-9 - Body ground Always 10 kohm or higher I8-10 - Body ground Always 10 kohm or higher I8-11 - Body ground Always 10 kohm or higher NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

This is the power source circuit for the memory mirror ECU

Scheme 15

Scheme 16

Scheme 17

Scheme 18

1. CHECK MEMORY MIRROR ECU (POWER SOURCE) LH: Disconnect the I1 connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition I1-1 (GND) - Body ground Always Below 1 ohm Measure the voltage according to the value(s) in the table below. Voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition I1-3 (SIG) - Body ground Ignition switch OFF --> ON 0 V --> 10 to 14 V VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition I1-4 (CPUB) - Body ground Constant 10 to 14 V I1-6 (BDR) - Body ground Constant 10 to 14 V RH: Disconnect the H1 connector. Measure the resistance according to the value(s) in the table below. Resistance RESISTANCE SPECIFIED CONDITION Tester Connection Condition Specified Condition H1-1 (GND) - Body ground Always Below 1 ohm Measure the voltage according to the value(s) in the table below. Voltage VOLTAGE SPECIFIED CONDITION Tester Connection Condition Specified Condition H1-3 (SIG) - Body ground Ignition switch OFF --> ON 0 V --> 10 to 14 V H1-4 (CPUB) - Body ground Constant 10 to 14 V H1-6 (BDR) - Body ground Constant 10 to 14 V NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

Scheme 19

Scheme 20