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05-1 112
                                           DIAGNOSTICS   -   SUPPLEMENTAL RESTRAINT SYSTEM                 05269-05




SRS WARNING LIGHT CIRCUIT MALFUNCTION (DOES NOT LIGHT
UP, WHEN IGNITION SWITCH IS TURNED TO ON)

CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter assy.
When the SRS is normal, the SRS warning light comes on for approx. 6 seconds after the ignition switch
is turned from the LOCK position to ON position, and then it turns off automatically.
If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver.
When terminals TC and CG of the DLC3 are connected, the DTC is displayed by blinking the SRS warning
light.
The signal to illuminate the SRS warning light is transmitted from the airbag sensor assy center to the com-
bination meter assy through the multiplex communication system.
WIRING DIAGRAM
See page 05-1 108.
INSPECTION PROCEDURE
      1      CHECK SOURCE VOLTAGE

(a)       Measure the voltage of the battery.
          Standard: 11 to 14 V
                                                  NG         REPLACE BATTERY

      OK

      2      CHECK SRS WARNING LIGHT

(a)       Turn the ignition switch to the LOCK position.
(b)       Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c)       Disconnect the connector from the airbag sensor assy center.
(d)       Connect the negative (-) terminal cable from the battery, and wait for at least 2 seconds.
(e)       Turn the ignition switch to the ON position.
(f)       Check the SRS warning light operation.
          OK:
          The SRS warning light comes on.
                                                  NG         REPLACE COMBINATION METER ASSY
                                                             (SEE PAGE 71-10 )

      OK

  REPLACE AIR BAG SENSOR ASSY CENTER (SEE PAGE 60-56 )




 2005 SIENNA REPAIR MANUAL (RM1163U)

                                                                   Author :            Date :                1295

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