Meter Gauge Display. Meter / Gauge System (For Sedan) Warning Buzzer Does Not Sound

The combination meter assembly controls the buzzers in accordance with signals from the center airbag sensor assembly, the main body ECU and the taillight relay.

HINT:

The main body ECU receives signals from the center airbag sensor assembly and transmits them to the combination meter assembly.

WIRING DIAGRAM

Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Sedan) Warning Buzzer Does Not Sound

INSPECTION PROCEDURE

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

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	D

HINT:

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 (YARIS_NCP93 RM000000IN001JX.html)

A

2.CHECK SUPPLEMENTAL RESTRAINT SYSTEM

Connect the Techstream to the DLC3.

Turn the ignition switch ON and turn the tester ON.

Enter the following menus: Body Electrical / SRS Airbag / Trouble Codes.
Result:
Result
Proceed to
No SRS DTCs are output
A
SRS DTCs are output
B

GO TO SUPPLEMENTAL RESTRAINT SYSTEM (YARIS_NCP93 RM000000XF60CAX.html)

A

3.CHECK OCCUPANT CLASSIFICATION SYSTEM

Connect the Techstream to the DLC3.

Turn the ignition switch ON and turn the tester ON.

Enter the following menus: Body Electrical / Occupant Detection / Trouble Codes.
Result:
Result
Proceed to
No occupant classification system DTCs are output
A
Occupant classification system DTCs are output
B

GO TO OCCUPANT CLASSIFICATION SYSTEM (YARIS_NCP93 RM0000010V106IX.html)

A

4.CHECK KEY REMINDER FUNCTION

Ignition switch is OFF.

Key is in ignition key cylinder.

Driver side door is open.
OK:
Key reminder warning buzzer ON.

REPLACE MAIN BODY ECU

REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM000000IN001JX.html)

5.READ VALUE USING TECHSTREAM (FRONT DOOR COURTESY SWITCH (DRIVER SIDE))

Connect the Techstream to the DLC3.

Turn the ignition switch ON and turn the tester ON.

Select the item below from the Data List, and read the value displayed on the Techstream.

Body Electrical / Main Body / Data List::

Tester Display
Measurement Item/Range
Normal Condition
Diagnostic Note
D Door Courtesy SW
Driver side door courtesy switch signal / ON or OFF
ON: Driver door is open
OFF: Driver door is closed
-

Go to step 9

OK

6.READ VALUE USING TECHSTREAM (UNLOCK WARNING SWITCH)

Connect the Techstream to the DLC3.

Turn the ignition switch ON and turn the tester ON.

Select the item below from the Data List, and read the value displayed on the Techstream.

Body Electrical / Main Body / Data List::

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Key Unlock Warning 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 (YARIS_NCP93 RM000000IN001JX.html)

NG

7.INSPECT UNLOCK WARNING SWITCH ASSEMBLY

Disconnect the D19 unlock warning switch assembly connector.

Remove the unlock warning switch assembly.

Measure the resistance.
Standard resistance:
Tester
Connection
Condition
Specified
Condition
1 - 2
Not pushed
10 k Ω or higher
1 - 2
Pushed
Below 1 Ω

Reconnect the unlock warning switch assembly.

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

OK

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

Disconnect the D19 unlock warning switch connector.

Disconnect the 4D main body ECU connector.

Measure the resistance.
Standard resistance:
Tester Connection
Specified Condition
D19-1 - 4D-7 (KSW)
Below 1 Ω
D19-2 - Body ground
Below 1 Ω

Reconnect the unlock warning switch connector.

Reconnect the main body ECU connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU

9.INSPECT FRONT DOOR COURTESY SWITCH (DRIVER SIDE)

Disconnect the J2 front door courtesy switch connector.

Measure the resistance.
Standard resistance:
Tester
Connection
Condition
Specified
Condition
J2-1 - Body ground
Not pushed (ON)
Below 1 Ω
J2-1 - Body ground
Pushed (OFF)
10 kΩ or higher

Reconnect the front door courtesy switch connector.

REPLACE FRONT DOOR COURTESY SWITCH (DRIVER SIDE) (YARIS_NCP93 RM000001DKX01FX.html)

OK

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

Disconnect the J2 front door courtesy switch connector.

Disconnect the 4A main body ECU connector.

Measure the resistance.
Standard resistance:
Tester Connection
Specified Condition
J2-1 - 4A-21 (DCTY)
Below 1 Ω

Reconnect the front door courtesy switch connector.

Reconnect the main body ECU connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU

11.READ VALUE USING TECHSTREAM (FRONT DOOR COURTESY SWITCH)

Connect the Techstream to the DLC3.

Turn the ignition switch ON and turn the tester ON.

Select the item below from the Data List, and read the value displayed on the Techstream.

Body Electrical / Main Body / Data List::

Item
Measurement Item /
Display (Range)
Normal Condition
Diagnostic Note
D Door Courtesy SW
Driver door courtesy switch signal /
ON or OFF
ON: Driver door is open
OFF: Driver door is closed
-

Go to step 12

REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM000000IN001JX.html)

12.INSPECT FRONT DOOR COURTESY SWITCH (DRIVER SIDE)

Disconnect the J2 front door courtesy switch assembly connector.

Measure the resistance.
Standard resistance:
Tester
Connection
Condition
Specified
Condition
J2-1 - Body ground
Not pushed (ON)
Below 1 Ω
J2-1 - Body ground
Pushed (OFF)
10kΩ or higher

Reconnect the front door courtesy switch connector.

REPLACE FRONT DOOR COURTESY SWITCH (DRIVER SIDE) (YARIS_NCP93 RM000001DKX01FX.html)

OK

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

Disconnect the J2 front door courtesy switch connector.

Disconnect the 4A main body ECU connector.

Measure the resistance.
Standard resistance:
Tester Connection
Specified Condition
J2-1 - 4A-21 (DCTY)
Below 1 Ω

Reconnect the front door courtesy switch connector.

Reconnect the main body ECU connector.

REPLACE FRONT DOOR COURTESY SWITCH (DRIVER SIDE) (YARIS_NCP93 RM000001DKX01FX.html)

REPLACE MAIN BODY ECU

Result	Proceed to
No occupant classification system DTCs are output	A
Occupant classification system DTCs are output	B

Tester Connection	Condition	Specified Condition
1 - 2	Not pushed	10 k Ω or higher
1 - 2	Pushed	Below 1 Ω

Tester Connection	Specified Condition
D19-1 - 4D-7 (KSW)	Below 1 Ω
D19-2 - Body ground	Below 1 Ω

Tester Connection	Specified Condition
J2-1 - 4A-21 (DCTY)	Below 1 Ω

Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
D Door Courtesy SW	Driver door courtesy switch signal / ON or OFF	ON: Driver door is open OFF: Driver door is closed	-