Lexus ES300 (1997 year). Manual — part 395
R05898
R14287
H00045
P–
P+
(–)
(+)
D Squib
P Squib
Airbag Sensor
Assembly
Spiral
Cable
AB0069
AB0118
R13006
W01934
AB0119
W02045
H00024
P+
P–
Airbag Sensor
Assembly
P Squib
D Squib
Spiral
Cable
ACC
ON
or
DLC1
E1
Tc
Code 54
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–357
509
1997 LEXUS ES300 (RM511U)
2
Check P squib circuit.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the airbag sensor assembly and front passenger airbag
assembly measure the resistance between P+ and P–.
OK:
Resistance: Below 1
Ω
NG
Repair or replace harness or connector be-
tween airbag sensor assembly and front pas-
senger airbag assembly.
OK
3
Check airbag sensor assembly.
PREPARATION:
(a)
Connect connector to airbag sensor assembly.
(b)
Using a service wire, connect P+ and P– on airbag sensor
assembly side of connector between airbag sensor as-
sembly and front passenger airbag assembly.
(c)
Connect negative (–) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a)
Turn ignition switch to ACC or ON and wait at least 20 se-
conds.
(b)
Clear malfunction code stored in memory
(See page
(c)
Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d)
Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e)
Using SST, connect terminal Tc and E1 of DLC1.
SST 09843–18020
(f)
Check DTC.
OK:
DTC 54 is not output.
HINT:
Codes other than code 54 may be output at this time, but they
are not relevant to this check.
R05909
AB0118
R13006
AB0119
W02045
H00025
Airbag Sensor
Assembly
P Squib
D Squib
Spiral
Cable
ACC
ON
or
DLC1
E1
Tc
Code 54
DI–358
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
510
1997 LEXUS ES300 (RM511U)
NG
Replace airbag sensor assembly.
OK
4
Check P squib.
PREPARATION:
(a)
Turn ignition switch to LOCK.
(b)
Disconnect negative (–) terminal cable from the battery,
and wait at least 90 seconds.
(c)
Connect front passenger airbag assembly connector.
(d)
Connect negative (–) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a)
Turn ignition switch to ACC or ON and wait at least 20 se-
conds.
(b)
Clear malfunction code stored in memory
(See page
(c)
Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d)
Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e)
Using SST, connect terminal Tc and E1 of DLC1.
SST 09843–18020
(f)
Check DTC.
OK:
DTC 54 is not output.
HINT:
Codes other than code 54 may be output at this time, but they
are not relevant to this check.
NG
Replace front passenger airbag 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.
W04365
Airbag
Sensor
Assembly
Ignition Switch
Battery
2
1
5A
3
7
6
3
6
1
W–R
L–R
B–R
ACC
IG2
ALT
AM1
AM2
CIG
IGN
1N
1K
1N
1K
ACC
IG1
IG2
ST2
AM1
AM2
4
J15
Junction
connector
Instrument
Panel J/B
W
5
B–R
1B
1K
1K
1B
1
5
2A
100A
4
W–R
B
2
1
2
W–B
B–R
B–G
Engine
Room J/B
FL MAIN
3.0 W
Fusible Link
Block
15
16
II
E1
F11
F6
F8
2L
Instrument
Panel J/B
GR
Instrument
Panel J/B
1N
1J
W–B
15A
30A
40A
10
1
1
2
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–359
511
1997 LEXUS ES300 (RM511U)
DTC
Normal
Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage–increase circuit (DC–DC converter) in the airbag sensor 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.
The diagnosis system malfunction display for this circuit is different to other circuits–when the SRS warning
light remains lit up and the DTC is a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and the source voltage returns to
normal, the SRS warning light automatically goes off.
DTC No.
Diagnosis
(Normal)
Source voltage drop.
WIRING DIAGRAM
DI0B7–01
R05894
AB0117
H00001
Airbag Sensor
Assembly
LOCK
Spiral
Cable
D Squib
P Squib
AB0119
W02766
H00041
ON
Airbag Sensor Assembly
ACC
IG2
(+)
(–)
DI–360
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
512
1997 LEXUS ES300 (RM511U)
INSPECTION PROCEDURE
1
Preparation.
PREPARATION:
(a)
Disconnect negative (–) terminal cable from the battery,
and wait at least 90 seconds.
(b)
Remove steering wheel pad (See page
).
(c)
Disconnect connector of front passenger airbag assem-
bly (See page
(d)
Disconnect connector of airbag sensor assembly
(See page
CAUTION:
Store the steering wheel pad with the front surface facing
upward.
2
Check source voltage.
PREPARATION:
(a)
Connect negative (–) terminal cable to battery.
(b)
Turn ignition switch ON.
CHECK:
Measure voltage at IG2 or ACC on sensor and operate electric
system. (defogger, wiper, headlight, heater blower, etc.)
OK:
Voltage: 10 – 14 V
NG
Check the harness between battery and airbag
sensor assembly, and check the battery and
charging system.
OK
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст