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DI-397
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
DI58K-02
DTC B0102/11 Short in D and P Squib Circuit (to Ground)
CIRCUIT DESCRIPTION
The D and P squib circuits consist of the airbag sensor assembly, spiral cable, steering wheel pad and front
passenger airbag assembly.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-2 .
DTC B0102/11 is recorded when ground short is detected in the D and P squib circuits.
DTC No. DTC Detecting Condition Trouble Area
S Short circuit in D squib wire harness (to ground)
S Steering wheel pad (D squib)
S Short circuit in P squib wire harness (to ground)
S Front passenger airbag assembly (P squib)
S D squib malfunction
B0102/11 S Spiral cable
S P squib malfunction
S Airbag sensor assembly
S Spiral cable malfunction
S Wire harness
S Airbag sensor assembly malfunction
WIRING DIAGRAM
Airbag Sensor Assembly
A21
D Squib (Steering Wheel Pad)
Y-B 14
1
C21 D+
Spiral Cable
2 P-B 13
C21 D-
A20
P Squib (Front Passenger Airbag Assembly)
10
1 Y-R
C21 P+
Y-G 11
2
C21 P-
H03605
2002 4RUNNER (RM887U)
Author : Date : 573
DI-398
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI-456 )
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
Airbag cable and steering wheel pad, measure the resistance between
Sensor D+ and body ground.
Assembly
Spiral OK:
Cable Resistance: 1 M or Higher
D Squib
D+
H03099 (-) (+)
H02145 H03019
NG Go to step 7.
OK
2002 4RUNNER (RM887U)
Author : Date : 574
DI-399
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
3 Check P squib circuit.
CHECK:
For the connector (on the front passenger airbag assembly
P+ side) between the front passenger airbag assembly and airbag
sensor assembly, measure the resistance between P+ and
body ground.
(-) (+) OK:
Resistance: 1 M or Higher
P Squib
Airbag
Sensor
Assembly
Spiral
Cable
H02145
H03100 H03101
NG Repair or replace harness or connector be-
tween front passenger airbag assembly and air-
bag sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 575
DI-400
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
4 Check airbag sensor assembly.
PREPARATION:
P- P+ (a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect D+ and D- of the connector
(on the spiral cable side) between the spiral cable and
steering wheel pad.
(c) Using a service wire, connect P+ and P- of the connector
(on the front passenger airbag assembly side) between
Airbag
P Squib the front passenger airbag assembly and airbag sensor
Sensor
D Squib Assembly assembly.
Spiral
(d) Connect negative (-) terminal cable to the battery, and
Cable
wait at least for 2 seconds.
CHECK:
ON
(a) Turn ignition switch to ACC or ON and wait at least 20 se-
D- D+ ACC
conds.
(b) Clear DTC stored in memory.
(See step 5 on page DI-377 )
or
(c) Turn ignition switch to LOCK, and wait at least 20 se-
DLC1 DTC B0102/11 conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Check DTC.
E1 Tc (See page DI-377 )
H02144
H03103 H02144 OK:
AB0118 AB0118
R13006 W02042 H03102 DTC B0102/11 is not output.
HINT:
Codes other than DTC B0102/11 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK
2002 4RUNNER (RM887U)
Author : Date : 576
DI-401
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
5 Check D squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
Airbag (b) Disconnect negative (-) terminal cable from the battery,
Sensor
and wait at least for 90 seconds.
Assembly
Spiral (c) Connect the steering wheel pad connector.
Cable (d) Connect negative (-) terminal cable to the battery, and
D Squib
wait at least for 2 seconds.
ACC ON CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least for 20
or seconds.
(b) Clear DTC stored in memory.
DLC1 DTC B0102/11 (See step 5 on page DI-377 )
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
E1 seconds.
Tc
(e) Check DTC.
H03104 (See page DI-377 )
AB0118 AB0119
R13006 W02042 H03105 OK:
DTC B0102/11 is not output.
HINT:
Codes other than DTC B0102/11 may be output at this time, but
they are not relevant to this check.
NG Replace steering wheel pad.
OK
2002 4RUNNER (RM887U)
Author : Date : 577
DI-402
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
6 Check P squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
P Squib Airbag (b) Disconnect negative (-) terminal cable from the battery,
Sensor and wait at least for 90 seconds.
Assembly
Spiral (c) Connect the front passenger airbag assembly connector.
Cable (d) Connect negative (-) terminal cable to the battery, and
wait at least for 2 seconds.
ACC ON CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
or (b) Clear DTC stored in memory.
DLC1 DTC B0102/11 (See step 5 on page DI-377 )
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
E1 Tc
(e) Check DTC.
H03106 (See page DI-377 )
AB0118 AB0119
R13006 W02042 H03107 OK:
DTC B0102/11 is not output.
HINT:
Codes other than DTC B0102/11 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. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.
2002 4RUNNER (RM887U)
Author : Date : 578
DI-403
DIAGNOSTICS - SUPPLEMENTAL RESTRAINT SYSTEM
7 Check spiral cable.
PREPARATION:
Disconnect the connector between the airbag sensor assembly
Spiral
Airbag and spiral cable.
Sensor CHECK:
Cable
Assembly
D Squib For the connector (on the spiral cable side) between the steer-
ing wheel pad and spiral cable, measure the resistance be-
tween D+ and body ground.
OK:
D+
Resistance: 1 M or Higher
(-) (+)
H01000
H02145 H03021
NG Repair or replace spiral cable.
OK
8 Check harness between airbag sensor assembly and spiral cable.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and airbag sensor assembly, measure the resistance be-
Spiral Airbag tween D+ and body ground.
Sensor OK:
Cable
D Squib Assembly
Resistance: 1 M or Higher
D+
(-) (+)
H01004
R14301 H06304 NG Repair or replace harness between airbag sen-
sor assembly and spiral cable.
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. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.
2002 4RUNNER (RM887U)
Author : Date : 579
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