Body Control System - Diagnostics: Diagnosis Toyota Sequoia I рестайлинг

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

This ECU is connected to the multiplex communication system. Therefore, be sure to check that there is no troubles in the multiplex communication system before performing the troubleshooting.

Scheme 1

Scheme 2

DATA LIST/ACTIVE TEST

1. DATA LIST HINT: According to the DATA LIST displayed by the hand-held tester, you can read the values of the switches, sensors, actuators and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting is one of the methods to shorten labor time. Connect the hand-held tester to the DLC3. Turn the ignition switch ON. According to the display on the tester, read the "DATA LIST". BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition KEY UNLK WRN SW Key unlock warning switch/ ON or OFF ON: Key is in ignition key cylinder KEY UNLK WRN SW Key unlock warning switch/ ON or OFF OFF: No key is in ignition key cylinder ACC SW ACC switch/ ON or OFF ON: Ignition switch ACC ACC SW ACC switch/ ON or OFF OFF: Ignition switch OFF IG SW IG switch/ ON or OFF ON: Ignition switch ON IG SW IG switch/ ON or OFF OFF: Ignition switch OFF PARKING BRAKE SW Parking brake switch/ ON or OFF ON: Parking brake pedal depressed (ON) PARKING BRAKE SW Parking brake switch/ ON or OFF OFF: Parking brake released (OFF) HOOD COURTSY SW Hood courtesy switch/ ON or OFF ON: Engine hood OPEN (Hood courtesy switch ON) HOOD COURTSY SW Hood courtesy switch/ ON or OFF OFF: Engine hood CLOSED (Hood courtesy switch OFF) D DOR CTY SW Driver door courtesy light switch/ ON or OFF ON: Driver door is opened D DOR CTY SW Driver door courtesy light switch/ ON or OFF OFF: Driver door is closed P DOR CTY SW Front passenger door courtesy light switch/ ON or OFF ON: Front passenger door is opened P DOR CTY SW Front passenger door courtesy light switch/ ON or OFF OFF: Front passenger door is closed Rr DOR CTY SW Rear passenger door courtesy light switch/ ON or OFFP DOR CTY SW ON: Rear passenger door is opened Rr DOR CTY SW Rear passenger door courtesy light switch/ ON or OFFP DOR CTY SW OFF: Rear passenger door is closed MIRR SEL SW R Remote control mirror switch passenger side/ ON or OFF ON: Remote control mirror switch passenger side is selected MIRR SEL SW R Remote control mirror switch passenger side/ ON or OFF OFF: Remote control mirror switch passenger side is not selected MIRR SEL SW L Remote control mirror switch driver side/ ON or OFF ON: Remote control mirror switch driver side is selected MIRR SEL SW L Remote control mirror switch driver side/ ON or OFF OFF: Remote control mirror switch driver side is not selected MIRR POS SW R Remote control mirror switch R position/ ON or OFF ON: Remote control mirror switch R position is selected MIRR POS SW R Remote control mirror switch R position/ ON or OFF OFF: Remote control mirror switch R position is not selected MIRR POS SW L Remote control mirror switch L position/ ON or OFF ON: Remote control mirror switch L position is selected MIRR POS SW L Remote control mirror switch L position/ ON or OFF OFF: Remote control mirror switch L position is not selected MIRR POS SWUP Remote control mirror switch UP position/ ON or OFF ON: Remote control mirror switch UP position is selected MIRR POS SWUP Remote control mirror switch UP position/ ON or OFF OFF: Remote control mirror switch UP position is not selected MIRR POS SW DWN Remote control mirror switch DOWN position/ ON or OFF ON: Remote control mirror switch DOWN position is selected MIRR POS SW DWN Remote control mirror switch DOWN position/ ON or OFF OFF: Remote control mirror switch DOWN position is not selected AUTO LIGHT SW Light control switch (AUTO)/ ON or OFF ON: Light control switch position is AUTO AUTO LIGHT SW Light control switch (AUTO)/ ON or OFF OFF: Light control switch position is not AUTO HEAD LIGHT SW Light control switch (HEAD)/ ON or OFF ON: Light control switch position is HEAD HEAD LIGHT SW Light control switch (HEAD)/ ON or OFF OFF: Light control switch position is not HEAD TAIL LIGHT SW Light control switch (TAIL)/ ON or OFF ON: Light control switch position is TAIL TAIL LIGHT SW Light control switch (TAIL)/ ON or OFF OFF: Light control switch position is not TAIL ILLUMINATE RATE Illumination rate information/ MIN: 0 MAX: 99.99 Condition value will be displayed Normal value: 0.8 ms to 22.0 ms SEAT M1 SW Memory seat switch (M1)/ ON or OFF ON: Memory seat switch position is M1 SEAT M1 SW Memory seat switch (M1)/ ON or OFF OFF: Memory seat switch position is not M1 SEAT M2 SW Memory seat switch (M2)/ ON or OFF ON: Memory seat switch position is M2 SEAT M2 SW Memory seat switch (M2)/ ON or OFF OFF: Memory seat switch position is not M2 SEAT SET SW Memory seat switch (SET)/ ON or OFF ON: Memory seat switch position is SET SEAT SET SW Memory seat switch (SET)/ ON or OFF OFF: Memory seat switch position is not SET GLS BRK DETECT Glass breakage sensor/ ON or OFF ON: Glass breakage sensor operates GLS BRK DETECT Glass breakage sensor/ ON or OFF OFF: Glass breakage sensor does not operate WIRELESS OPER Wireless door lock control function/ ON or OFF ON: Wireless door lock function operated WIRELESS OPER Wireless door lock control function/ ON or OFF OFF: Wireless door lock function not operated OPEN DOOR WARN DOOR indicator light/ ON or OFF ON: Any door is open OPEN DOOR WARN DOOR indicator light/ ON or OFF OFF: All doors are closed AUTO LOCK DELAY Auto lock delay/ 60s or 30s Customized value will be displayed UNLOCK/2OPER 2 time operation wireless unlock signal/ ON or OFF Customized condition will be displayed INT/LGTON/UNLK ON or OFF ON: Dome light comes on when the doors are unlocked by the wireless transmitter INT/LGTON/UNLK ON or OFF OFF: Dome light does not come on when the doors are unlocked by the wireless transmitter ALARM FUNCTION Panic function signal/ ON or OFF ON: Panic function operated ALARM FUNCTION Panic function signal/ ON or OFF OFF: Panic function not operated AUTO LOCK Vehicle speed linked door lock/ ON or OFF Customized condition will be displayed UNLK/KEY TWICE ON or OFF ON: Pressing the "UNLOCK" switch twice unlocks the driver side door UNLK/KEY TWICE ON or OFF OFF: Pressing the "UNLOCK" switch twice does not unlock the driver side door ALL UNLK/ OPN-CL Ignition switch OFF, shift lever P position, driver courtesy lamp switch ON signal/ ON or OFF ON: All doors unlock when opening driver door within 10 seconds after turning ignition switch OFF ALL UNLK/ OPN-CL Ignition switch OFF, shift lever P position, driver courtesy lamp switch ON signal/ ON or OFF OFF: Doors are not unlocked UNLOCK/PARK Ignition switch OFF, shift lever P position, vehicle speed 0 km/h/ON or OFF ON: All doors unlock when shift lever is moved to P from any position other than P while ignition switch is ON. UNLOCK/PARK Ignition switch OFF, shift lever P position, vehicle speed 0 km/h/ON or OFF OFF: No door unlocks even when shift lever is moved to P from any position other than P while ignition switch is ON WARNING TIME Warning time/ 53, 15S, 27.5S or 60S Customized value will be displayed PASSIVE MODE Passive mode information/ ON or OFF Customized condition will be displayed WARN BY GLS SEN ON or OFF ON: Warns when glass breakage is detected WARN BY GLS SEN ON or OFF OFF:Does not warn when glass breakage is detected ENTRY DELAY Illuminated entry delay/ OS, 14S or 30S Customized value will be displayed AUTO LOCK/SHIFT ON or OFF ON: Auto lock function can be set by the shift lever AUTO LOCK/SHIFT ON or OFF OFF: Auto lock function cannot be set by the shift lever I/L ON/UNLOCK Room light signal/ ON or OFF ON: Room light is on I/L ON/UNLOCK Room light signal/ ON or OFF OFF: Room light is off LIGHTING TIME Lighting time/ 7.5S, 15S or 30S Customized value will be displayed SENSITIVITY Turn on luminous intensity/ DARK2, DARK1, NORMAL, LIGHT1 or LIGHT2 Customized condition will be displayed LIGHT OFF DELAY Light auto off delay/ OFF, 30S, 60S or 90S Customized condition will be displayed DISP EX ON SEN Display extinction luminous intensity/ NORMAL, DARK2, DARK1, LIGHT1 or LIGHT2 Customized condition will be displayed DISP EX OFF SEN Display extinction release luminous intensity/ NORMAL, DARK2, DARK1, LIGHT1 or LIGHT2 Customized condition will be displayed
2. ACTIVE TEST HINT: Performing the ACTIVE TEST using the hand-held tester allows the relays, actuators and so on to operate without parts removal. Performing the ACTIVE TEST as a first step of troubleshooting is one of the methods to shorten labor time. It is possible to display the DATE LIST during the ACTIVE TEST. Connect the hand-held tester to the DLC3. Turn the ignition switch ON. According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details Diagnostic Note SECURITY INDIC Turn security indicator light ON/OFF - SECURITY HORN Turn theft horn ON/OFF This test is available only for vehicles equipped with security horn. BUZZ CONT SOUND Wireless buzzer continuous sound ON/OFF - BUZZ RESP SOUND Turn wireless buzzer ON/OFF Turn volume to MAX if it is a wireless buzzer equipped vehicle. HEAD LIGHT Headlight relay ON/OFF - TAIL LIGHT Taillight ON/OFF - ILLUMI OUTPUT Illuminated entry system ON/OFF IG is ON, E/G is stopped and light control SW is OFF. ALL COURTESY DOOR indicator light ON/OFF - VEHICLE HORN Turn vehicle horn ON/OFF - RL P/W UP/DOWN Rear left passenger power window DOWN/UP CAUTION: This test causes vehicle parts to move. Watch your hands and feet. RR P/W UP/DOWN Rear right passenger power window DOWN/UP CAUTION: This test causes vehicle parts to move. Watch your hands and feet. DOOR LOCK Door lock LOCK/UNLOCK All doors are closed.

Scheme 3

Scheme 4

CIRCUIT DESCRIPTION

This circuit provides power to operate the body ECU.

BDR terminal: Power source for door lock motor

S+B terminal: Power source for security horn

ACC terminal: Power source for accessory

BECU terminal: Power source for backing up body ECU

IG terminal: Power source for starting body ECU

WIG terminal: Power source for washer motor

Scheme 5

INSPECTION PROCEDURE

1. Check RAD No. 2, AM1, WSH, ECU-IG, Door No. 2 and ECU-B fuses. CHECK: Check for continuity of the RAD No. 2, AM1, WSH, ECU-IG, door No. 2 and ECU-B fuses. OK: Continuity NG: Replace defective fuse. OK: Go to next step.
2. Check voltage between terminals ACC, WIG, IG, BECU, S+B, BDR and GND1 of body ECU connector. PREPARATION: Turn the ignition switch ON. CHECK: Measure the voltage between terminals ACC, WIG, IG and GND1. OK: Voltage: 10 to 14 V PREPARATION: Turn the ignition switch OFF. CHECK: Measure the voltage between terminals BECU, BDR, S+B and GND1. OK: Voltage: 10 to 14 V OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
3. Check wire harness and connector between body ECU and body ground, body ECU and battery (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227567-S18412338282006040600000) ).

Body ECU judges the switch position with the terminal voltage of the rear wiper and washer switch and runs the washer motor.

Scheme 6

1. Check wiper and washer switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/wiperwasher-systems/#wiper-system-washer-system) ). NG: Replace wiper and washer switch. OK: Go to next step.
2. Check rear washer motor (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/wiperwasher-systems/#wiper-system-washer-system) ). NG: Replace rear washer motor. OK: Go to next step.
3. Check wire harness and connector between wiper and washer switch and body ECU, wiper and washer switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Go to next step.
4. Check wire harness and connector between rear washer motor and washer switch, rear washer motor and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

TAILLIGHT relay will be "ON" by operating the light control switch. The transistor which activates the tail light relay has two sorts: one is activated by the light control switch for fail safe and the other is activated by CPU. When the theft deterrent system is activated, it causes the transistor in the ECU to switch ON and OFF at approximately 0.4 sec. intervals. This switches the TAILLIGHT relay ON and OFF, and thus flashing the tail-lights (See the wiring diagram below).

In this condition, if any of the following operations is done, the transistor in the ECU goes OFF and the TAIL-LIGHT relay switches OFF, and thus stopping the taillights flashing

1. Unlock the front LH or RH door with a key.
2. Turn the ignition switch to ACC or ON position.
3. Unlock the doors with the wireless door lock control system.
4. Wait for approximately 60 seconds.

Scheme 7

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check TAILLIGHT relay using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details TAIL LIGHT Taillight ON/OFF OK: The taillights turn on or off correctly when operating them through the hand-held tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check TAILLIGHT relay (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#headlight-and-taillight-system) ). NG: Replace TAILLIGHT relay. OK: Go to next step.
3. Check wire harness and connector between TAILLIGHT relay and body ECU, battery and TAILLIGHT relay (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

HEAD relay will be "ON" by operating the light control switch. The transistor which activates the HEAD relay has two sorts: one is activated by the light control switch for fail safe and the other is activated by CPU. The one that is activated by CPU prevents the headlight from turning off at the time of trouble with the other system in the automatic operation circuit.

When the theft deterrent system is activated, it causes the transistor in the ECU to switch ON and OFF at approximately 0.25 sec. intervals. This switches the HEAD relay ON and OFF, and thus flashing the headlights (See the wiring diagram below).

In this condition, if any of the following operations is done, the transistor in the ECU goes OFF and the HEAD control relay switches OFF, and thus stopping the headlights flashing

1. Unlock the front LH or RH door with a key.
2. Turn the ignition switch to ACC or ON position.
3. Unlock the doors with the wireless door lock control system.
4. Wait for approximately 60 seconds.

Scheme 8

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check HEAD relay using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details HEAD LIGHT Headlight relay ON/OFF OK: The headlights turn on or off correctly when operating them through the hand-held tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check HEAD relay (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#headlight-and-taillight-system) ). NG: Replace HEAD relay. OK: Go to next step.
3. Check wire harness and connector between HEAD relay and body ECU, battery and HEAD relay (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The fog light switch is built into the combination switch.

Turning the fog light switch ON supplies power to terminal FFOG of the body ECU.

The fog lights come on when the FOG light relay is turned on.

Scheme 9

1. Check FOG LIGHT relay (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#fog-light-system) ). NG: Replace FOG LIGHT relay. OK: Go to next step.
2. Check fog light switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#fog-light-system) ). NG: Replace fog light switch. OK: Go to next step.
3. Check wire harness and connector between FOG LIGHT relay and fog light switch, FOG LIGHT relay and battery, FOG LIGHT relay and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Go to next step.
4. Check wire harness and connector between fog light switch and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

Power is supplied to the DIMMER and DRL No. 4 relays when the HEAD relay is turned on. The HEAD relay turns on by turning the light control switch to the TAIL or HEAD position. The DIMMER relay turns on by turning the headlight dimmer switch to the LOW, HIGH, or FLASH position. The body ECU determines the light control switch position and turns on the DRL No. 4 and DIMMER relays. The DRL No. 4 relay and the daytime running light resistor are parallel circuits. If the light control switch is OFF, electric current flows to body ground via the resistor instead of driving the DRL No. 4 relay. The headlights come on and dim according to the amount of resistance.

Scheme 10

1. Check DRL No. 4 relay and DIMMER relay (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#headlight-and-taillight-system) ). NG: Replace DRL No. 4 relay and DIMMER relay. OK: Go to next step.
2. Check wire harness and connector (Daytime running light circuit) (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The key unlock warning switch turns on when the ignition key is inserted into the key cylinder and turns off when the key is removed.

Scheme 11

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check key unlock warning switch using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, read the "DATA LIST". BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition KEY UNLK WRN SW Key unlock warning switch/ON or OFF ON: Key is in ignition key cylinder KEY UNLK WRN SW Key unlock warning switch/ON or OFF OFF: No key is in ignition key cylinder OK: The indication on the tester switches between ON and OFF in accordance with the key unlock warning switch status. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check key unlock warning switch (See «INSPECTION»(ref-227601-S19301242142006040600000) ). NG: Replace key unlock warning switch. OK: Go to next step.
3. Check wire harness and connector between key unlock warning switch and body ECU, key unlock warning switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The body ECU detects the condition of the back door power window switch and sends the related information to the back door ECU via BEAN.

Scheme 12

1. Check back door power window control switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/windows/#back-door-power-window-control-system) ). NG: Replace back door power window control switch. OK: Go to next step.
2. Check wire harness and connector between back door power window control switch and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The body ECU actuates the door lock motor when it receives a motor drive signal from the wireless transmitter or an ECU via BEAN.

Scheme 13

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 3 .

1. Check door lock motor using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details Diagnostic Note DOOR LOCK Door lock LOCK/UNLOCK All doors are closed. OK: All door lock motors lock or unlock the doors correctly when operating them through the hand-held tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check door lock motor (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/door-locks-anti-theft-systems/#power-door-lock-control-system) ). NG: Replace door lock motor. OK: Go to next step.
3. Check wire harness and connector between door lock motor and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The door unlock detection switch is built in the door lock motor assembly. This switch is ON when the door lock knob is in the unlock position and OFF when the lock knob is in the lock position. The ECU detects the door lock knob conditions in this circuit.

Scheme 14

1. Check rear door unlock detection switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/door-locks-anti-theft-systems/#power-door-lock-control-system) ). NG: Replace door lock motor assembly. OK: Go to next step.
2. Check wire harness and connector between door unlock detection switch and body ECU, door unlock detection switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The engine hood courtesy switch is built into the engine hood lock assembly, and is turned on when the engine hood is opened and goes off when the engine hood is closed.

Scheme 15

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

Scheme 16

1. Check engine hood courtesy switch using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, read the "DATA LIST". BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition HOOD COURTSY SW Hood courtesy switch/ON or OFF ON: Engine hood OPEN (Hood courtesy switch ON) OFF: Engine hood CLOSE (Hood courtesy switch OFF) OK: The indication on the tester switches between ON and OFF in accordance with the engine hood courtesy switch status. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check engine hood courtesy switch. PREPARATION: Disconnect the engine hood courtesy switch connector. CHECK: Check continuity between terminals 1 and 2 when the engine hood lock is locked and unlocked. OK: TESTER CONNECTION SPECIFIED CONDITION Engine hood lock condition Tester connection Specified condition LOCK 1 - 2 No continuity UNLOCK 1 - 2 Continuity NG: Replace engine hood courtesy switch. OK: Go to next step.
3. Check harness and connector between body ECU and switch, switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The door courtesy light switch is turned ON when the door is opened and is turned OFF when the door is closed.

Scheme 17

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check courtesy light switch using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, read the "DATA LIST". BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition D DOR CTY SW Driver door courtesy light switch/ ON or OFF ON: Driver door is opened D DOR CTY SW Driver door courtesy light switch/ ON or OFF OFF: Driver door is closed P DOR CTY SW Front passenger door courtesy light switch/ON or OFF ON: Front passenger door is opened P DOR CTY SW Front passenger door courtesy light switch/ON or OFF OFF: Front passenger door is closed Rr DOR CTY SW Rear passenger door courtesy light switch/ON or OFF ON: Rear passenger door is opened Rr DOR CTY SW Rear passenger door courtesy light switch/ON or OFF OFF: Rear passenger door is closed OK: The indication on the tester switches between ON and OFF in accordance with the open/close door status. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check door courtesy light switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/interiorillumination-lights/#interior-light-system) ). NG: Replace courtesy light switch. OK: Go to next step.
3. Check wire harness and connector between door courtesy light switch and body ECU, door courtesy light switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

When the theft deterrent system is preparing to set, this circuit turns on the indicator light. When the system has been set, it continually turns the indicator light on for 1 second and turns it off for 1 second, and thus blinking the indicator light.

This theft deterrent indicator sends a key judgment of the immobilizer to the transponder key ECU.

Scheme 18

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check theft deterrent indicator using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details SECURITY INDIC Turn security indicator light ON/OFF OK: The theft deterrent indicator light flashes or goes off correctly when operating it through the hand-held tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check theft deterrent indicator (See «SYSTEM DESCRIPTION»(ref-227584-S41188831872006040600000) ). NG: Replace combination meter. OK: Go to next step.
3. Check wire harness and connector between theft deterrent indicator (combination meter) and body ECU, theft deterrent indicator (combination meter) and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

During warning of the theft deterrent system, the body ECU activates the theft deterrent horn.

Scheme 19

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check theft deterrent horn using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details Diagnostic Note SECURITY HORN Turn theft horn ON/OFF This test is available only for vehicles equipped with security horn. OK: The theft deterrent horn sounds or stops correctly when operating it through the hand-held tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check theft deterrent horn (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/door-locks-anti-theft-systems/#theft-deterrent-system) ). NG: Replace theft deterrent horn. OK: Go to next step.
3. Check wire harness and connector between theft deterrent horn and body ECU, theft deterrent horn and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The signal from the transmitter is sent to the body ECU through RDA line of the wireless door control receiver. RDA line is diagnosed by the body ECU, check DTC also in case of the failure of the wireless function.

Scheme 20

1. Check that DTC B1242 is not indicated (See «DOOR UNLOCK DETECTION SWITCH CIRCUIT»(ref-227574-S37940511242006040600000) ). OK: DTC B1242 is not indicated. NG: Go to multiplex communication system (See «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-227577-S15746093802006040600000) ). OK: Go to next step.
2. Check wire harness and connector (PRG circuit). PREPARATION: Disconnect the connectors of the wireless door lock receiver and body ECU. CHECK: Check continuity between terminal W2-3 (PRG) of the wireless door lock receiver and terminal B5-5 (PRG) of the body ECU. OK: Continuity NG: Repair or replace wire harness or connector. OK: Go to next step.
3. Check voltage between terminals +B and E of wireless door lock receiver. CHECK: Measure the voltage between terminals W2-5 (+B) and W2-1 (E) of the wireless door lock receiver. OK: Voltage: 10 to 14 V NG: Repair or replace harness or connector. OK: Go to next step.
4. Check wireless door lock receiver. PREPARATION: Check that malfunction disappears when another wireless door lock receiver in good condition is installed. CHECK: Check wireless door lock function. OK: The wireless door lock system operates normally. NG: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). OK: Failure of the original wireless door lock receiver.
5. Check wire harness and connector (RDA circuit). PREPARATION: Disconnect the wireless door lock receiver connector. CHECK: Check continuity between terminal W2-2 (RDA) of the wireless door lock receiver and terminal B5-4 (RDA) of the body ECU. OK: Continuity NG: Repair or replace harness or connector. OK: Go to next step.
6. Check voltage between terminals +B and E of wireless door lock receiver. CHECK: Measure the voltage between terminals W2-5 (+B) and W2-1 (E) of the wireless door lock receiver. OK: Voltage: 10 to 14 V NG: Repair or replace harness or connector. OK: Go to next step.
7. Check wireless door lock receiver. PREPARATION: Check that malfunction disappears when another wireless door lock receiver in good condition is installed. CHECK: Check wireless door lock function. OK: The wireless door lock system operates normally. NG: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). OK: Failure of the original wireless door lock receiver.

The body ECU receives a door OPEN/CLOSE demand signal from the wireless transmitter via the wireless door lock receiver. The ECU then sounds the wireless door lock buzzer as an answer back.

Scheme 21

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check wireless door lock buzzer using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details Diagnostic Note BUZZ RESP SOUND Turn wireless buzzer ON/OFF Turn volume to MAX. if it is a wireless buzzer equipped vehicle. OK: The wireless door lock buzzer sounds normally. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check wireless door lock buzzer (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/door-locks-anti-theft-systems/#wireless-door-lock-control-system) ). NG: Replace wireless door lock buzzer. OK: Go to next step.
3. Check wire harness and connector between wireless door lock buzzer and body ECU, body ground and wireless door lock buzzer (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The body ECU determines if the parking brake switch is ON or OFF and sends the parking brake switch ON/ OFF signal to the combination meter via BEAN.

Scheme 22

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check parking brake switch using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, read the "DATA LIST". BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition PARKING BRAKE SW Parking brake switch/ON or OFF ON: Parking brake pedal depressed (ON) OFF: Parking brake released (OFF) OK: The indication on the tester switches between ON and OFF in accordance with the parking brake switch status. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check parking brake switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/gauges-instrument-panels/#combination-meter) ). NG: Replace parking brake switch. OK: Go to next step.
3. Check wire harness and connector between parking brake switch and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The rear power window switch controls the UP/DOWN function of the rear power window motor.

The driver door ECU (power window master switch) operates the remote control of each window UP/DOWN function via BEAN.

Scheme 23

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check rear power window motor using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details Diagnostic Note RL P/W UP/DOWN Rear left passenger power window DOWN/UP CAUTION: This test causes vehicle parts to move. Watch your hands and feet. RR P/W UP/DOWN Rear right passenger power window DOWN/UP CAUTION: This test causes vehicle parts to move. Watch your hands and feet. OK: The rear power windows go up or down correctly when operating them through the hand-held tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check power window control switch rear (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/windows/#power-window-control-system) ). NG: Replace power window switch rear. OK: Go to next step.
3. Check wire harness and connector between power window control switch rear and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Go to next step.
4. Check power window motor rear (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/windows/#power-window-control-system) ). NG: Replace power window motor rear. OK: Go to next step.
5. Check voltage between power window control switch rear and battery, power window control switch rear and body ground. PREPARATION: Disconnect the power window control switch rear connector. CHECK: Measure the voltage between terminals P3-4 (B) and P3-3 (E), and terminals P4-4(B) and P4-3 (E) of the power window control switch rear. OK: Voltage: 10 to 14 V NG: Repair or replace harness or connector. OK: Go to next step.
6. Check wire harness and connector between power window motor rear and power window control switch rear (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The body ECU detects the light control switch position and drives the DRL No. 4 and HEAD relays. If the vehicle is equipped with an automatic light control system, the light control switch includes the AUTO position.

The body ECU turns the headlights ON and OFF based on the ambient light level outside the vehicle, which is detected by the automatic light control sensor.

Scheme 24

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check headlight control switch using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, read the "DATA LIST". BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition AUTO LIGHT SW Light control switch (AUTO)/ON or OFF ON: Light control switch position is AUTO AUTO LIGHT SW Light control switch (AUTO)/ON or OFF OFF: Light control switch position is not AUTO HEAD LIGHT SW Light control switch (HEAD)/ON or OFF ON: Light control switch position is HEAD HEAD LIGHT SW Light control switch (HEAD)/ON or OFF OFF: Light control switch position is not HEAD TAIL LIGHT SW Light control switch (TAIL)/ON or OFF ON: Light control switch position is TAIL TAIL LIGHT SW Light control switch (TAIL)/ON or OFF OFF: Light control switch position is not TAIL OK: The indication on the tester switches between ON and OFF in accordance with the light control switch status. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check light control switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#headlight-and-taillight-system) ). NG: Replace light control switch. OK: Go to next step.
3. Check wire harness and connector between light control switch and body ECU, light control switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The body ECU detects the ambient light level outside the vehicle via the automatic light control sensor.

The body ECU turns the headlights ON and OFF based on the ambient light level sensed by the automatic light control sensor.

Scheme 25

1. Check automatic light control sensor. When using hand-held tester: PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch and hand-held tester main switch ON. BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition Diagnostic Note ILLUMINATE RATE Illumination rate information/ MIN: 0 MAX: 99.99 Condition value will be displayed Normal value: 0.8 ms to 22.0 ms - CHECK: The illumination rate value should change within the following range such as when the light sensor is exposed to light or covered by hand. OK: 0.8 ms to 22.0 ms HINT: Time needed for the light sensor to generate one cycle of frequency according to the brightness. When not using hand-held tester (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#headlight-and-taillight-system) ). NG: Replace automatic light control sensor. OK: Go to next step.
2. Check harness and connector between automatic light control sensor and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

This circuit detects the headlight dimmer switch condition.

w/ daytime running light

The body ECU detects the headlight dimmer switch position and turns on the DIMMER relay. The body ECU informs the combination meter of the headlight dimmer switch condition via BEAN.

When the headlight dimmer switch position is HI or FLASH, the HI beam indicator light on the combination meter comes on.

W/o daytime running light

When the headlight dimmer switch position is HI or FLASH, the HI beam indicator light on the combination meter comes on.

When the HI beam headlights come on, current is supplied to the HI beam indicator light on the combination meter to turn the indicator light on.

Scheme 26

Scheme 27

1. Check headlight dimmer switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/exterior-lights/#headlight-and-taillight-system) ). NG: Replace headlight dimmer switch. OK: Go to next step.
2. Check wire harness and connector between headlight dimmer switch and body ECU, headlight dimmer switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Go to next step.
3. Check apparatus. CHECK: Choose the apparatus to be inspected. DAYTIME RUNNING LIGHT DESCRIPTION W/o Daytime running light A w/ Daytime running light B B: Proceed to next circuit inspection shown in problem symptoms table (see «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). A: Go to next step.
4. Check wire harness and connector between combination meter and headlight dimmer switch, combination meter and headlight (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The body ECU and the back door ECU detect the condition of each door courtesy light switch. FRONT COURTESY LIGHT SWITCH CONTROL

The 2 front courtesy light switches are directly connected to the body ECU and back door ECU. If the courtesy light switch is turned on (a front door is opened), voltage applied to terminal ILE of the body ECU is grounded inside the ECU and the step light, front courtesy light, etc. come on.

REAR COURTESY LIGHT SWITCH CONTROL

The 2 rear courtesy light switches are directly connected to the body ECU and back door ECU via each courtesy light. The rear courtesy light comes on when a rear door is opened.

Scheme 28

Scheme 29

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check illumination (interior light) using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. (Do not start the engine.) Turn the light control switch OFF. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details Diagnostic Note ILLUMI OUTPUT Illuminated entry system ON/OFF - OK: The illumination (interior) lights turn on or off correctly when operating them through the handheld tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check illumination light (interior light system) (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/interiorillumination-lights/#interior-light-system) ). NG: Replace defective light. OK: Go to next step.
3. Check wire harness and connector between each illumination light and body ECU, each illumination light and back door ECU, each illumination light and battery (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The vehicle horn sounds when the horn switch is pressed. It also sounds as an alarm for the theft deterrent system when the body ECU detects any alert condition.

Scheme 30

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check vehicle horn using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, perform the "ACTIVE TEST". BODY ECU: DIAGNOSTIC CHART Item Test Details Diagnostic Note VEHICLE HORN Turn vehicle horn sound ON/OFF - OK: The horn sounds or stops correctly when operating it through the hand-held tester. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check horn (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/horns/#horn-system) ). NG: Replace horn. OK: Go to next step.
3. Check horn switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/horns/#horn-system) ). NG: Replace horn switch. OK: Go to next step.
4. Check horn relay (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/horns/#horn-system) ). NG: Replace horn relay. OK: Go to next step.
5. Check wire harness and connector between horn and body ECU, body ECU and horn switch (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace wire harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The remote control mirror switch has different levels of resistance depending on the switch position.

The body ECU senses the switch position through the resistance of the remote control mirror switch.

The body ECU sends an up/down/right/left signal to the driver door ECU and the passenger door ECU via BEAN.

The mirror's driving position and retract position are directly controlled by the remote control mirror switch.

Scheme 31

HINT

When using the hand-held tester, start the inspection from step 1 and when not using the hand-held tester, start from step 2 .

1. Check remote mirror control switch using hand-held tester. PREPARATION: Connect the hand-held tester to the DLC3. Turn the ignition switch ON. CHECK: According to the display on the tester, read the "DATA LIST". BODY ECU: DIAGNOSTIC CHART Item Measurement Item/Display (Range) Normal Condition MIRR SEL SW R Remote control mirror switch passenger side/ON or OFF ON: Remote control mirror switch passenger side is selected MIRR SEL SW R Remote control mirror switch passenger side/ON or OFF OFF: Remote control mirror switch passenger side is not selected MIRR SEL SW L Remote control mirror switch driver side/ON or OFF ON: Remote control mirror switch driver side is selected MIRR SEL SW L Remote control mirror switch driver side/ON or OFF OFF: Remote control mirror switch driver side is not selected MIRR POS SW R Remote control mirror switch R position/ON or OFF ON: Remote control mirror switch R position is selected MIRR POS SW R Remote control mirror switch R position/ON or OFF OFF: Remote control mirror switch R position is not selected MIRR POS SW L Remote control mirror switch L position/ON or OFF ON: Remote control mirror switch L position is selected MIRR POS SW L Remote control mirror switch L position/ON or OFF OFF: Remote control mirror switch L position is not selected MIRR POS SW UP Remote control mirror switch UP position/ON or OFF ON: Remote control mirror switch UP position is selected MIRR POS SW UP Remote control mirror switch UP position/ON or OFF OFF: Remote control mirror switch UP position is not selected MIRR POS SW DWN Remote control mirror switch DOWN position/ON or OFF ON: Remote control mirror switch DOWN position is selected MIRR POS SW DWN Remote control mirror switch DOWN position/ON or OFF OFF: Remote control mirror switch DOWN position is not selected OK: The indication on the tester switches between ON and OFF in accordance with the remote control mirror switch status. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ). NG: Go to next step.
2. Check remote control mirror switch (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/windows/#power-window-control-system) ). NG: Replace remote control mirror switch. OK: Go to next step.
3. Check voltage between remote control mirror switch and battery, remote control mirror switch and body ground. PREPARATION: Disconnect the remote control mirror switch connector. Turn the ignition switch ON. CHECK: Measure the voltage between terminals R5-6 (B) and R5-2 (E) of the remote control mirror switch. OK: Voltage: 10 to 14 V NG: Repair or replace harness or connector. OK: Go to next step.
4. Check wire harness and connector between remote control mirror switch and remote control mirror (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace harness or connector. OK: Go to next step.
5. Check retract motor operation (See «INSPECTION»(/toyota/sequoia/i-2004-2007/remont/windows/#power-window-control-system) ). NG: Replace remote control mirror. OK: Go to next step.
6. Check wire harness and connector between remote control mirror switch and remote control mirror (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The position control ECU & switch assy memorizes the driver seat position and the outer mirror positions. It controls each motor when the driving position memory switch is operated.

The position signals of the driving position memory switch received by the body ECU are sent to the position control ECU and switch assy via BEAN.

Scheme 32

1. Check driving position memory switch (See «MEMORY SWITCH CIRCUIT»(ref-227585-S08007615222006040600000) ). NG: Replace driving position memory switch. OK: Go to next step.
2. Check wire harness and connector between driving position memory switch and body ECU, driving position memory switch and body ground (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace harness or connector. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

The glass breakage sensor microphone detects the sound of metal (and other) objects striking the windows and outputs a signal to the glass breakage sensor ECU. Sound of breaking window glass is amplified (fixed frequency) by the resonator provided in front of the microphone.

The glass breakage sensor ECU receives a signal from the glass breakage sensor microphone. If the signal matches the specification, the ECU outputs the glass breakage signal to the body ECU.

The body ECU receives the signal from the glass breakage sensor ECU and outputs a warning.

Scheme 33

Scheme 34

Scheme 35

1. Check voltage between terminals GBIG, GB+B and GND of glass breakage sensor ECU. PREPARATION: Disconnect the glass breakage sensor ECU connector. CHECK: Measure the voltage between terminals GB+B and GND of the glass breakage sensor ECU. OK: Voltage: 10 to 14 V PREPARATION: Turn the ignition switch ON. CHECK: Measure the voltage between terminals GBIG and GND of the glass breakage sensor ECU. OK: Voltage: 10 to 14 V NG: Repair or replace wire harness or connector. OK: Go to next step.
2. Check wire harness and connector between glass breakage sensor ECU and body ECU (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace harness or connector. OK: Go to next step.
3. Check wire harness and connector between glass breakage sensor ECU and glass breakage sensor microphone (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). NG: Repair or replace harness or connector. OK: Go to next step.
4. Check glass breakage sensor ECU (microphone output). PREPARATION: Reconnect the glass breakage sensor ECU, glass breakage sensor microphone and body ECU connectors. Connect an oscilloscope to terminal G4-3 of the glass breakage sensor ECU and body ground. Turn the ignition switch ON. CHECK: Check the signal waveform according to the condition(s) in the table below. ITEM CONDITION Item Condition Tool setting 12V/DIV, 300ms/DIV Vehicle condition Tap the glass breakage sensor microphone with a hard object such as your fingernail. OK: As shown in the illustration. HINT: If the problem recurs even after replacement, replace the glass breakage sensor ECU. NG: Replace glass breakage sensor microphone. OK: Proceed to next circuit inspection shown in problem symptoms table (See «PROBLEM SYMPTOMS TABLE»(ref-227573-S05610623892006040600000) ).

See also:
• ADJUSTMENT
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION
• INSPECTION