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.
The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the airbag ECU 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 stored in the airbag ECU 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 airbag ECU assembly to the combination meter assembly through the CAN communication system.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Click here.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
CHECK BATTERY VOLTAGE
Measure the voltage of the battery.
Standard Voltage |
---|
11 to 14 V |
NG |
INSPECT CHARGING SYSTEM AND BATTERY Click here |
OK |
CHECK CONNECTOR
Turn the ignition switch off.
Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
Check that the connector is properly connected to the combination meter assembly.
OK |
---|
The connector is properly connected. |
Tech Tips
If the connector is not connected securely, reconnect the connector and proceed to the next inspection.
Disconnect the connector from the combination meter assembly.
Check that the terminal of the connector is not damaged.
OK |
---|
The terminal is not deformed or damaged. |
NG |
REPAIR OR REPLACE CONNECTOR |
OK |
CHECK WIRE HARNESS (COMBINATION METER ASSEMBLY - BODY GROUND)
*a | Front view of wire harness connector (to Combination Meter Assembly) |
Connect the cable to the negative (-) battery terminal.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
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Turn the ignition switch off.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
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|
NG |
REPAIR OR REPLACE WIRE HARNESS |
OK |
CHECK SRS WARNING LIGHT
Disconnect the cable from the negative (-) battery terminal.
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
Connect the connector to the combination meter assembly.
Disconnect the connector from the airbag ECU assembly.
Connect the cable to the negative (-) battery terminal.
Turn the ignition switch to ON.
Check the SRS warning light condition.
OK |
---|
After the primary check period, the SRS warning light goes off for approximately 10 seconds and turns back on. |
Tech Tips
The primary check period is approximately 6 seconds after the ignition switch is turned to ON.
OK |
REPLACE AIRBAG ECU ASSEMBLY Click here |
NG |
REPLACE COMBINATION METER ASSEMBLY Click here |