DI–316
DIAGNOSTICS
–
SUPPLEMENTAL RESTRAINT SYSTEM
DI6PX–03
DTC
B1158/B1159/16
Front Airbag Sensor (LH) Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor (LH) circuit consists of the airbag sensor assembly and front airbag sensor (LH).
For details of the function of each component, see OPERATION on page RS–2.
DTC B1158/B1159/16 is recorded when malfunction is detected in the front airbag sensor (LH) circuit.
DTC No.
B1158/B1159/16
DTC Detection Condition
Trouble Area
S Wire harness
S Front airbag sensor (LH)
S Airbag sensor assembly
S Front airbag sensor (LH) malfunction
WIRING DIAGRAM
F1
Front Airbag Sensor (LH)
+SL
–SL
Airbag Sensor Assembly
2
W–R
1
IH1
W–R
15
C5
+SL
1
BR
2
IH1
BR
26
C5
–SL
H14373
INSPECTION PROCEDURE
1
Prepare for inspection (See step 1 on page DI–323).
2000 MR2 (RM760U)
AuthorĂ:
DateĂ:
480
DI–317
DIAGNOSTICS
2
SUPPLEMENTAL RESTRAINT SYSTEM
Check wire harness (to B+).
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
ON
Airbag Sensor
Assembly
CHECK:
(a) Turn the ignition switch ON.
(b) For the connector (on the airbag sensor assembly side)
between the front airbag sensor (LH) and the airbag sensor assembly, measure the voltage between body ground
and each of terminals +SL and –SL.
OK:
Voltage: Below 1 V
+SL
(+)
H03355
AB0119
H08065
–
NG
(–)
–SL
Go to step 8.
H10972
OK
3
Check wire harness (to ground).
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
Airbag Sensor
Assembly
CHECK:
For the connector (on the airbag sensor assembly side) between the front airbag sensor (LH) and the airbag sensor assembly, measure the resistance between body ground and
each of terminals +SL and –SL.
OK:
Resistance: 1 MΩ or Higher
+SL
H03353
H08399
–SL
H10973
NG
Go to step 9.
OK
2000 MR2 (RM760U)
AuthorĂ:
DateĂ:
481
DI–318
DIAGNOSTICS
4
–
SUPPLEMENTAL RESTRAINT SYSTEM
Check wire harness.
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
Airbag Sensor
Assembly
CHECK:
For the connector (on the airbag sensor assembly side) between the front airbag sensor (LH) and the airbag sensor assembly, measure the resistance between terminals +SL and
–SL.
OK:
Resistance: 1 MΩ or Higher
+SL
H03355
H08058
–SL
H10974
NG
Go to step 10.
OK
5
Check wire harness.
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
Airbag Sensor
Assembly
–SL
+SL
+SL
H03353
H03360 H08058
–SL
H14490
PREPARATION:
Using a service wire, connect +SL and –SL of the connector (on
the front airbag sensor (LH) side) between the airbag sensor
assembly and the front airbag sensor (LH).
CHECK:
For the connector (on the airbag sensor assembly side) between the front airbag sensor (LH) and the airbag sensor assembly, measure the resistance between terminals +SL and
–SL.
OK:
Resistance: Below 1 Ω
NG
Go to step 11.
OK
2000 MR2 (RM760U)
AuthorĂ:
DateĂ:
482
DI–319
DIAGNOSTICS
6
–
SUPPLEMENTAL RESTRAINT SYSTEM
Check front airbag sensor (LH).
Airbag
Sensor
Assembly
CHECK:
For the connector (on the front airbag sensor (LH)), measure
the resistance between terminals +SL and –SL.
OK:
Resistance: 300 – 1500 Ω
Front Airbag
Sensor (LH)
+SL
–SL
H04504
H01062
NG
H08346
Replace front airbag sensor (LH).
OK
7
Check airbag sensor assembly.
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
→←
→←
ON
DTC B1158/B1159/16
DLC3
CG
Tc
H02757
AB0119
H10600 H01064
H10647
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.
(c) Connect the front airbag sensor (LH) connector and airbag sensor assembly connector.
(d) Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch ON, and wait at least for 20 seconds.
(b) Clear the DTC stored in memory (See page DI–237).
(c) Turn the ignition switch to LOCK, and wait at least for 20
seconds.
(d) Turn the ignition switch ON, and wait at least for 20 seconds.
(e) Check the DTC (See page DI–237).
OK:
DTC B1158/B1159/16 is not output.
HINT:
Codes other than code B1158/B1159/16 may be output at this
time, but they are not relevant to this check.
NG
Replace airbag sensor assembly.
2000 MR2 (RM760U)
AuthorĂ:
DateĂ:
483
DI–320
DIAGNOSTICS
–
SUPPLEMENTAL RESTRAINT SYSTEM
OK
From results of above inspection, suspected part can now be considered normal. To make sure
of this, use simulation method to check.
8
Check luggage room wire harness (to B+).
Front Airbag
Sensor (LH)
←→
Airbag
Sensor
Assembly
Luggage Room
Wire Harness
ON
+SL
(–)
H03354
AB0119
H14508
–SL
PREPARATION:
Disconnect the luggage room wire harness connector on the
airbag sensor assembly side.
CHECK:
(a) Turn the ignition switch ON.
(b) For the connector (on the airbag sensor assembly side)
of the luggage room wire harness, measure the voltage
between body ground and each of terminals +SL and
–SL.
OK:
Voltage: Below 1 V
(+)
H14511
NG
Repair or replace luggage room wire harness.
OK
Repair or replace harness or connector between airbag sensor assembly and luggage room wire
harness.
2000 MR2 (RM760U)
AuthorĂ:
DateĂ:
484
DI–321
DIAGNOSTICS
9
–
SUPPLEMENTAL RESTRAINT SYSTEM
Check luggage room wire harness (to ground).
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
Luggage Room
Wire Harness
+SL
CHECK:
For the connector (on the airbag sensor assembly side) of the
luggage room wire harness, measure the resistance between
body ground and each of terminals +SL and –SL.
OK:
Resistance: 1 MΩ or Higher
–SL
H03354
H14509
H14512
NG
Repair or replace luggage room wire harness.
OK
Repair or replace harness or connector between airbag sensor assembly and luggage room wire
harness.
10
Check luggage room wire harness.
Luggage Room
Wire Harness
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
+SL
H03354
H14510
CHECK:
For the connector (on the airbag sensor assembly side) of the
luggage room wire harness, measure the resistance between
terminals +SL and –SL.
OK:
Resistance: 1 MΩ or Higher
–SL
NG
Repair or replace luggage room wire harness.
H14513
OK
2000 MR2 (RM760U)
AuthorĂ:
DateĂ:
485
DI–322
DIAGNOSTICS
–
SUPPLEMENTAL RESTRAINT SYSTEM
Repair or replace harness or connector between airbag sensor assembly and luggage room wire
harness.
11
Check luggage room wire harness.
Front Airbag
Sensor (LH)
Luggage Room
Wire Harness
Airbag
Sensor
Assembly
+SL
–SL
+SL
H03352
H03360
H14510
–SL
H14514
PREPARATION:
Using a service wire, connect terminals +SL and –SL of the connector (on the front airbag sensor (LH) side) of the luggage
room wire harness.
CHECK:
For the connector (on the airbag sensor assembly side) of the
luggage room wire harness, measure the resistance between
terminals +SL and –SL.
OK:
Resistance: Below 1 Ω
NG
Repair or replace luggage room main harness.
OK
Repair or replace harness or connector between airbag sensor assembly and luggage room wire
harness.
2000 MR2 (RM760U)
AuthorĂ:
DateĂ:
486