Inspection Procedure

Total OBD & ECU Auto Diagnostics

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CHECK BUZZER (SEAT BELT, KEY REMINDER, TAILLIGHT REMINDER)

(a) Check that the seat belt, key reminder and taillight reminder warning buzzers sound.

Result

Result

Proceed to

Seat belt warning buzzer does not sound (where equipped with seat belt warning system)

A

Key reminder warning buzzer does not sound (where equipped with key reminder warning system)

B

Taillight reminder warning buzzer does not sound (Meter illuminations normal)

C

No warning buzzers sound

Seat belt warning buzzer on: Ignition switch is ON, driver or front passenger seat belt is unfastened, and vehicle speed is 12.4mph (20 km/h) or more. Key reminder warning buzzer on: Ignition switch is OFF, key is in ignition key cylinder, and driver side door is open.

Taillight reminder warning buzzer on: Ignition switch is OFF, taillight relay switch is ON, and driver side door is open.

Go to step 5

Go to step 11

REPLACE COMBINATION METER ASSEMBLY

CHECK SUPPLEMENTAL RESTRAINT SYSTEM

(a) Connect the intelligent tester with CAN VIM to the DLC3.

(b) Turn the ignition switch ON and turn the tester ON.

(c) Enter the following menus: DIAGNOSIS / SRS AIRBAG/ DTC INFO.

Result

Result

Proceed to

No SRS DTCs are output

A

SRS DTCs are output

GO TO SUPPLEMENTAL RESTRAINT SYSTEM

CHECK OCCUPANT CLASSIFICATION SYSTEM

(a) Connect the intelligent tester with CAN VIM to the DLC3.

(b) Turn the ignition switch ON and turn the tester ON.

(c) Enter the following menus: DIAGNOSIS / OCCUPANT DETECT /DTC INFO.

Result

Result

Proceed to

No occupant classification system DTCs are output

A

Occupant classification system DTCs are output

GO TO OCCUPANT CLASSIFICATION SYSTEM

CHECK KEY REMINDER FUNCTION

(a) Ignition switch is OFF.

(b) Key is in ignition key cylinder.

Key reminder warning buzzer ON.

REPLACE MAIN BODY ECU

REPLACE COMBINATION METER ASSEMBLY

READ VALUE OF INTELLIGENT TESTER (FRONT DOOR COURTESY SWITCH (DRIVER SIDE))

(a) Connect the intelligent tester with CAN VIM to the DLC3.

(b) Turn the ignition switch ON and turn the tester ON.

(c) Select the item below from the Data List, and read the value displayed on the intelligent tester.

MAIN BODY ECU

Item

Measurement Item / Display (Range)

Normal Condition

Diagnostic Note

D DOR CTYSW

Driver side door courtesy switch signal / ON or OFF

ON: Driver door is open OFF: Driver door is closed

Go to step 9

READ VALUE OF INTELLIGENT TESTER (UNLOCK WARNING SWITCH)

(a) Connect the intelligent tester with CAN VIM to the DLC3.

(b) Turn the ignition switch ON and turn the tester ON.

(c) Select the item below from the Data List, and read the value displayed on the intelligent tester.

MAIN BODY ECU

Item

Measurement Item / Display (Range)

Normal Condition

Diagnostic Note

KEY UNLK WRN SW

Unlock warning switch signal / ON or OFF

ON: Key is in ignition key cylinder OFF: No key is in ignition key cylinder

REPLACE COMBINATION METER ASSEMBLY

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

Component Side:

Not Pushed

Pushed

Unlock Warning Switch Assembly

B117144E07

(a) Disconnect the D19 unlock warning switch assembly connector.

(b) Remove the unlock warning switch assembly.

(c) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

1 - 2

Not pushed

10 k Q or higher

1 - 2

Pushed

Below 1 Q

(d) Reconnect the unlock warning switch assembly.

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - MAIN BODY ECU)

Fuse Engine Yaris

(a) Disconnect the D19 unlock warning switch connector.

(b) Disconnect the 4D main body ECU connector.

(c) Measure the resistance. Standard resistance

Tester Connection

Specified Condition

D19-1 - 4D-7 (KSW)

Below 1 Q

D19-2 - Body ground

Below 1 Q

(d) Reconnect the unlock warning switch connector.

(e) Reconnect the main body ECU connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU

INSPECT FRONT DOOR COURTESY SWITCH (DRIVER SIDE)

(a) Disconnect the J2 front door courtesy switch connector.

(b) Measure the resistance. Standard resistance

Tester Connection

Condition

Specified Condition

J2-1 - Body ground

Not pushed (ON)

Below 1 Q

J2-1 - Body ground

Pushed (OFF)

10 kQ or higher

(c) Reconnect the front door courtesy switch connector.

REPLACE FRONT DOOR COURTESY SWITCH (DRIVER SIDE)

CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY SWITCH - MAIN BODY ECU)

Wire Harness Side:

Front Door Courtesy Light Switch Connector (Driver Side)

Front View

Main Body ECU Connector

C4A)

DCTY

Front View

B112021E02

(a) Disconnect the J2 front door courtesy switch connector.

(b) Disconnect the 4A main body ECU connector.

(c) Measure the resistance. Standard resistance

Tester Connection

Specified Condition

J2-1 - 4A-21 (DCTY)

Below 1 Q

(d) Reconnect the front door courtesy switch connector.

(e) Reconnect the main body ECU connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU

READ VALUE OF INTELLIGENT TESTER (FRONT DOOR COURTESY SWITCH)

(a) Connect the intelligent tester with CAN VIM to the DLC3.

(b) Turn the ignition switch ON and turn the tester ON.

(c) Select the item below from the Data List, and read the value displayed on the intelligent tester.

MAIN BODY ECU

Item

Measurement Item / Display (Range)

Normal Condition

Diagnostic Note

D DOR CTYSW

Driver door courtesy switch signal / ON or OFF

ON: Driver door is open OFF: Driver door is closed

REPLACE COMBINATION METER ASSEMBLY

INSPECT FRONT DOOR COURTESY SWITCH (DRIVER SIDE)

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