AB0119
H01298
H01299
Airbag Sensor Assembly
ON
ACC
IG2
(+)
(-)
H01249
ON
-
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI-489
643
Author:
Date:
2001 SIENNA (RM787U)
2
Check source voltage.
PREPARATION:
Connect negative (-) terminal cable to the battery.
CHECK:
(a)
Turn the ignition switch to ON.
(b)
Measure the voltage between body ground and each of
ACC and IG2 on the sensor and operate electric system
(defogger, wiper, headlight, heater blower, etc.).
OK:
Voltage: 10 - 14 V
NG
Check harness between battery and airbag sen-
sor assembly, and check battery and charging
system.
OK
3
Does SRS warning light turn off?
PREPARATION:
(a)
Turn the ignition switch to LOCK.
(b)
Connect the steering wheel pad connector.
(c)
Connect the front passenger airbag assembly connector.
(d)
Connect the side airbag assembly connectors.
(e)
Connect the seat belt pretensioner connectors.
(f)
Connect the airbag sensor assembly connectors.
(g)
Connect the front airbag sensor connectors.
(h)
Connect the side airbag sensor assembly connectors.
(i)
Turn the ignition switch to ON.
CHECK:
Operate electric system (defogger, wiper, headlight, heater
blower, etc.) and check that SRS warning light goes off.
NO
Check for DTCs. If a DTC is output, perform trou-
bleshooting for the DTC. If a normal code is out-
put, replace airbag sensor assembly.
YES
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check.
