Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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

NG

CHECK AND REPLACE BATTERY OR CHARGING SYSTEM

OK

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.

(c) Check that the connectors are properly connected to the airbag sensor assembly and the combination meter assembly.

OK:

The connectors are properly connected.

NG

CONNECT CONNECTORS PROPERLY

OK

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.

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

(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)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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.

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

(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.

OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

REPLACE COMBINATION METER ASSEMBLY

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