Lexus RX300 (MCU15). Service manual — part 297
H03355
H03356
H09518
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)
+SR
(–)
–SR
Airbag Sensor
Assembly
H03353
H03356
H03360
H16296
Front Airbag
Sensor (RH)
Airbag
Sensor
Assembly
(+)
+SR
Airbag Sensor
Assembly
(–)
–SR
+SR
–SR
DI–420
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
LEXUS RX300 (RM785E)
4
Check wire harness.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (RH) and the airbag sensor as-
sembly, measure the resistance between +SR and –SR.
OK:
Resistance: 1 MΩ or Higher
NG
Go to step 10.
OK
5
Check wire harness.
PREPARATION:
Using a service wire, connect +SR and –SR of the connector
(on the front airbag sensor (RH) side) between the airbag sen-
sor assembly and the front airbag sensor (RH).
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (RH) and the airbag sensor as-
sembly, measure the resistance between +SR and –SR.
OK:
Resistance: Below 1 Ω
NG
Go to step 11.
OK
H04504
H01062
H08346
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)
+SR
(–)
–SR
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–421
LEXUS RX300 (RM785E)
6
Check front airbag sensor (RH).
CHECK:
For the connector of the front airbag sensor (RH), measure the
resistance between +SR and –SR.
OK:
Resistance: 300 – 1500 Ω
NG
Replace front airbag sensor (RH).
OK
H02757
AB0119
H01063
H10600
H10638
Front Airbag
Sensor (RH)
Airbag
Sensor
Assembly
ON
DTC B1156/B1157/15
→ ←
→ ←
DLC3
Tc
CG
DI–422
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
LEXUS RX300 (RM785E)
7
Check airbag sensor assembly.
PREPARATION:
(a)
Turn the ignition switch to LOCK.
(b)
Disconnect negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
(c)
Connect the front airbag sensor (RH) connector and air-
bag sensor assembly connector.
(d)
Connect negative (–) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a)
Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(b)
Clear the DTC stored in memory (See page DI–305).
(c)
Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d)
Turn the ignition switch to ON, and wait at least for 20 se-
conds.
(e)
Check the DTC (See page DI–305).
OK:
DTC B1156/B1157/15 is not output.
HINT:
Codes other than code B1156/B1157/15 may be output at this
time, but they are not relevant to this check.
NG
Replace airbag sensor assembly.
OK
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.
AB0119
H03354
H03364
H08348
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)
+SR
(–)
–SR
ON
Engine Room No. 2
Wire Harness
← →
H03354
H03362
H08349
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)
+SR
(–)
–SR
Engine Room No. 2
Wire Harness
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–423
LEXUS RX300 (RM785E)
8
Check engine room No. 2 wire harness (to B+).
PREPARATION:
Disconnect the engine room No. 2 wire harness connector on
the airbag sensor assembly side.
CHECK:
(a)
Turn the ignition switch to ON.
(b)
For the connector (on the RH front door wire harness
side) between the airbag sensor assembly and the en-
gine room No. 2 wire harness, measure the voltage be-
tween body ground and each of +SR and –SR.
OK:
Voltage: Below 1 V
NG
Repair or replace engine room No. 2 wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room No.
2 wire harness.
9
Check engine room No. 2 wire harness (to ground).
PREPARATION:
Disconnect the engine room No. 2 wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room No. 2 wire harness side)
between the airbag sensor assembly and the engine room No.
2 wire harness, measure the resistance between body ground
and each of +SR and –SR.
OK:
Resistance: 1 MΩ or Higher
NG
Repair or replace engine room No. 2 wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room No.
2 wire harness.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст