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:

A-TRAC Indicator Light Remains ON
DESCRIPTION This is the A-TRAC main switch circuit. When the A-TRAC switch is turned on with the transfer in L4, the A-TRAC function is available and the A-TRAC indicator light illuminates. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the skid control ECU (master ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION The 4 wheel drive control ECU records DTCs when the ECU detects a malfunction in the ECU itself or in system circuits. The DTCs can be read through the DLC3 of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions ...

Dtc Check / Clear
DTC CHECK / CLEAR 1. CHECK DTC (CHECK USING TECHSTREAM) (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes. (e) Check for DTCs, and then write them down. ( ...