Toyota Venza: SRS Warning Light Remains ON

DESCRIPTION

The SRS warning light is located on the combination meter assembly.

When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition switch is turned from off to ON, and then goes off automatically.

If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.

When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking of the SRS warning light.

The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the center airbag sensor assembly in case the source voltage drops.

When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the voltage of the SRS to normal voltage.

A malfunction in this circuit is not recorded in the center airbag sensor assembly. The SRS warning light automatically goes off when the source voltage returns to normal.

The signal to illuminate the SRS warning light is transmitted from the center airbag sensor assembly to the combination meter assembly through the CAN communication system and multiplex communication system.

WIRING DIAGRAM

PROCEDURE

1.	CHECK SRS WARNING LIGHT OPERATION

(a) Check the SRS warning light operation approximately 6 seconds after the ignition switch is turned to ON.

SRS Warning Light Illumination	Proceed to
Remains on	A
Remains on after it goes off	B

B

GO TO STEP 6

A

2.	CHECK BATTERY VOLTAGE

(a) Measure the voltage of the battery.

Standard Voltage:

11 to 14 V

Result

Result	Proceed to
OK	A
NG (for 2GR-FE)	B
NG (for 1AR-FE)	C

B

INSPECT CHARGING SYSTEM AND BATTERY

C

INSPECT CHARGING SYSTEM AND BATTERY

A

3.	CHECK CONNECTOR

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Check that the connector is properly connected to the center airbag sensor assembly.

OK:

The connector is properly connected.

HINT:

If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

(d) Disconnect the connector from the center airbag sensor assembly.

(e) Check that the terminal of the connector is not damaged.

OK:

The terminal is not deformed or damaged.

NG

REPLACE WIRE HARNESS

OK

4.	CHECK WIRE HARNESS (CENTER AIRBAG SENSOR ASSEMBLY - BODY GROUND)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the ignition switch to ON.

(c) Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
D6-21 (IG2) - Body ground	Ignition switch ON	8 to 16 V

(e) Turn the ignition switch off.

(f) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D6-25 (E1) - Body ground	Always	Below 1 Ω
D6-26 (E2) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Center Airbag Sensor Assembly)

NG

REPLACE WIRE HARNESS

OK

5.	CHECK SRS WARNING LIGHT

(a) Turn the ignition switch to ON.

(b) Check the SRS warning light condition.

OK:

After the primary check period, the SRS warning light goes off for approximately 10 seconds and remains on.

HINT:

The primary check period is approximately 6 seconds after the ignition switch is turned to ON.

OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

NG

REPLACE COMBINATION METER ASSEMBLY

6.	CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Result	Proceed to
DTC is not output	A
DTC is output	B

B

GO TO CAN COMMUNICATION SYSTEM

A

7.	CHECK BATTERY VOLTAGE

(a) Measure the voltage of the battery.

Standard Voltage:

11 to 14 V

Result

Result	Proceed to
OK	A
NG (for 2GR-FE)	B
NG (for 1AR-FE)	C

B

INSPECT CHARGING SYSTEM AND BATTERY

C

INSPECT CHARGING SYSTEM AND BATTERY

A

8.	CHECK CONNECTOR

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(c) Check that the connector is properly connected to the center airbag sensor assembly.

OK:

The connector is properly connected.

HINT:

If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

(d) Disconnect the connector from the center airbag sensor assembly.

(e) Check that the terminal of the connector is not damaged.

OK:

The terminal is not deformed or damaged.

NG

REPLACE WIRE HARNESS

OK

9.	CHECK WIRE HARNESS (CENTER AIRBAG SENSOR ASSEMBLY - BODY GROUND)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the ignition switch to ON.

(c) Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
D6-21 (IG2) - Body ground	Ignition switch ON	8 to 16 V

(e) Turn the ignition switch off.

(f) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D6-25 (E1) - Body ground	Always	Below 1 Ω
D6-26 (E2) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Center Airbag Sensor Assembly)

NG

REPLACE WIRE HARNESS

OK

10.	CHECK CONNECTOR

(a) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(b) Check that the connector is properly connected to the combination meter assembly.

OK:

The connector is properly connected.

HINT:

If the connector is not connected securely, reconnect the connector and proceed to the next inspection.

(c) Disconnect the connector from the combination meter assembly.

(d) Check that the terminal of the connector is not damaged.

OK:

The terminal is not deformed or damaged.

NG

REPLACE WIRE HARNESS

OK

11.	CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - BODY GROUND)

(a) Connect the cable to the negative (-) battery terminal.

(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
E2-14 (B) - Body ground	Always	11 to 14 V
E2-13 (IG+) - Body ground	Ignition switch ON	11 to 14 V

(d) Turn the ignition switch off.

(e) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E2-24 (ES) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Combination Meter Assembly)

NG

REPLACE WIRE HARNESS

OK

12.	CHECK SRS WARNING LIGHT

(a) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.

(b) Connect the connector to the combination meter assembly.

(c) Connect the cable to the negative (-) battery terminal.

(d) Turn the ignition switch to ON.

(e) Check the SRS warning light condition.

OK:

After the primary check period, the SRS warning light goes off for approximately 10 seconds and remains on.

HINT:

The primary check period is approximately 6 seconds after the ignition switch is turned to ON.

OK

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

NG

REPLACE COMBINATION METER ASSEMBLY