Toyota Tacoma (2015-2018) Service Manual: SRS Warning Light does not Come ON

Toyota Tacoma (2015-2018) Service Manual / Supplemental Restraint Systems / Airbag System / SRS Warning Light does not Come ON

DESCRIPTION

See page WIRING DIAGRAM .

WIRING DIAGRAM

See page CAUTION / NOTICE / HINT .

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work (See page ).

PROCEDURE

1.	INSPECT BATTERY

(a) Measure the voltage of the battery.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Battery	Always	11 to 14 V

CHECK AND REPLACE BATTERY OR CHARGING SYSTEM

2.	CHECK CONNECTION OF CONNECTORS

(a) Turn the ignition switch off.

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

OK:

The connectors are properly connected.

CONNECT CONNECTORS PROPERLY

3.	CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF COMBINATION METER ASSEMBLY)

(a) Turn the ignition switch off.

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

(d) Connect the cable to the negative battery terminal, and wait for at least 2 seconds.

(e) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
C9-20 (IG+) - C9-18 (ES)	Ignition switch ON	11 to 14 V

Text in Illustration

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK SRS WARNING LIGHT

(a) Turn the ignition switch off.

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

(d) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.

(e) Turn the ignition switch to ON.

(f) Check the SRS warning light condition.

OK:

The SRS warning light turns off after the primary check period and comes on again after approximately 10 seconds.

HINT:

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

REPLACE AIRBAG SENSOR ASSEMBLY

REPLACE COMBINATION METER ASSEMBLY

Front Airbag Sensor RH Circuit Malfunction (B1610/13)

DESCRIPTION The front airbag sensor RH consists of parts such as the diagnostic circuit and the frontal detection sensor. When the airbag sensor assembly receives signals from the frontal decelera ...

SRS Warning Light Remains ON

DESCRIPTION The SRS warning light is located on the combination meter assembly. When the SRS condition is normal, the SRS warning light illuminates for approximately 6 seconds after the ignition s ...

Other materials:

Rear Right Sensor Malfunction (C1AE9)
DESCRIPTION The No. 1 ultrasonic sensor (rear corner sensor RH) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (rear corner sensor RH). If the No. 1 ultrasonic sensor (rear corner sensor RH) has an open circuit or other ma ...

Invalid Data Received from Deceleration Sensor (C1442,C1443)
DESCRIPTION The airbag sensor assembly has a built-in yaw rate and acceleration sensor. The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system. DTC No. Detection ...

Rear Speed Sensor RH Performance (C1411,C1412)
DESCRIPTION Refer to DTCs C1401 and C1402 (See page ). DTC Code DTC Detection Condition Trouble Area C1411 C1412 One of the following conditions is met: When the vehicle is driven in reverse at a speed of 3 km/h (2 ...