Toyota Corolla Cross: SRS Warning Light does not Come ON

DESCRIPTION

The SRS warning light is located in 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 turns off automatically.

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.

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  HINT:

  When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

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• Inspect the fuses for circuits related to this system before performing the following procedure.
• When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

(a) Measure the voltage of the battery with the ignition switch off.

Standard Voltage:

11 to 14 V

NG

REPLACE OR RECHARGE AUXILIARY BATTERY

OK

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:

Wait at least 60 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

OK:

The connector is properly connected.

NG

CONNECT CONNECTOR PROPERLY

OK

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

(b) Check that the terminals of the connector are not deformed or damaged.

OK:

The terminals are not deformed or damaged.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

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

(b) Turn the ignition switch to ON.

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

Standard Voltage:

• *1: w/ Stop and Start System
• *2: w/o Stop and Start System

(d) Turn the ignition switch off.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Disconnect the cable from the negative (-) battery terminal. CAUTION: Wait at least 60 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

*1 Combination Meter Assembly *2 Airbag ECU Assembly *3 Wire Harness

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

(c) Disconnect the connector from the airbag ECU assembly.

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

(e) Turn the ignition switch to ON and check the SRS warning light condition.

OK:

After the primary check period, the SRS warning light turns off for approximately 10 seconds and then turns back on.

HINT:

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

OK

REPLACE AIRBAG ECU ASSEMBLY

NG

REPLACE COMBINATION METER ASSEMBLY

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