Page 1601 of 4323
H41440H23351
Spiral
CableAirbag
Sensor
Assembly
D2+
D2±
D Squib
(Dual stage ±
2nd step)
B C ED FACowl Wire
A23
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1399
1593 Author: Date:
2005 SEQUOIA (RM1146U)
17 Check cowl wire (short to ground).
PREPARATION:
Disconnect the cowl wire connector from the spiral cable.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A23±4 (D2+) ±
Body groundAlways1 MW or higher
A23±3 (D2±) ±
Body groundAlways1 MW or higher
NG Repair or replace cowl wire.
OK
Page 1602 of 4323
H41479H23350
Spiral
CableAirbag
Sensor
Assembly
D2+
D2±
D Squib
(Dual stage ±
2nd step)
Color: Black
A
B D EC F
DI±1400
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1594 Author: Date:
2005 SEQUOIA (RM1146U)
18 Check spiral cable (short to ground).
CHECK:
(a) Measure the resistance according to the value(s) in the
table below.
OK:
Tester ConnectionConditionSpecified Condition
D2+ ± Body groundAlways1 MW or higher
D2± ± Body groundAlways1 MW or higher
NG Replace spiral cable (see page RS±21).
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 (see page DI±1137).
HINT:
Perform the simulation method by selecting the check mode with the hand±held tester (see page
DI±1151).
After selecting the check mode, perform the simulation method by wiggling each connector of the air-
bag system or driving the vehicle on a city or rough road (see page DI±1151).
Page 1603 of 4323
H41440H23351
Spiral
CableAirbag
Sensor
Assembly
D2+
D2±
D Squib
(Dual stage ±
2nd step)
B C ED FACowl Wire
A23
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1401
1595 Author: Date:
2005 SEQUOIA (RM1146U)
19 Check cowl wire (short to B+).
PREPARATION:
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Disconnect the cowl wire connector from the spiral cable.
(d) Connect the negative (±) terminal cable to the battery,
and wait for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A23±4 (D2+) ±
Body groundIgnition switch ONBelow 1 V
A23±3 (D2±) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace cowl wire.
OK
Page 1604 of 4323

H41479H23350
Spiral
CableAirbag
Sensor
Assembly
D2+
D2±
D Squib
(Dual stage ±
2nd step)
Color: Black
A
B D EC F
DI±1402
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1596 Author: Date:
2005 SEQUOIA (RM1146U)
20 Check spiral cable (short to B+).
CHECK:
Measure the voltage according to the value(s) in the table be-
low when the ignition switch is in the ON position.
OK:
Tester ConnectionConditionSpecified Condition
D2+ ± Body groundIgnition switch ONBelow 1 V
D2± ± Body groundIgnition switch ONBelow 1 V
NG Replace spiral cable (see page RS±21).
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 (see page DI±1137).
HINT:
Perform the simulation method by selecting the check mode with the hand±held tester (see page
DI±1151).
After selecting the check mode, perform the simulation method by wiggling each connector of the air-
bag system or driving the vehicle on a city or rough road (see page DI±1151).
Page 1605 of 4323

H41440H23351
Spiral
CableAirbag
Sensor
Assembly
D2+
D2±
D Squib
(Dual stage ±
2nd step)
B C ED FACowl Wire
A23
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1403
1597 Author: Date:
2005 SEQUOIA (RM1146U)
21 Check cowl wire.
PREPARATION:
(a) Restore the released activation prevention mechanism of
connector ºBº to the original condition.
(b) Disconnect the cowl wire connector from the spiral cable.
(c) Connect the negative (±) terminal cable to the battery,
and wait for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A23±4 (D2+) ±
Body groundIgnition switch ONBelow 1 V
A23±3 (D2±) ±
Body groundIgnition switch ONBelow 1 V
PREPARATION:
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the bat-
tery, and wait for at least 90 seconds.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A23±4 (D2+) ±
A23±3 (D2±)AlwaysBelow 1 W
A23±4 (D2+) ±
Body groundAlways1 MW or higher
A23±3 (D2±) ±
Body groundAlways1 MW or higher
PREPARATION:
Release the activation prevention mechanism built into con-
nector ºBº (see page DI±1137).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
A23±4 (D2+) ±
A23±3 (D2±)Always1 MW or higher
NG Repair or replace cowl wire.
OK
Page 1606 of 4323

H41479H23350
Spiral
CableAirbag
Sensor
Assembly
D2+
D2±
D Squib
(Dual stage ±
2nd step)
Color: Black
A
B D EC F
DI±1404
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1598 Author: Date:
2005 SEQUOIA (RM1146U)
22 Check spiral cable.
PREPARATION:
Connect the negative (±) terminal cable to the battery, and wait
for at least 2 seconds.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
D2+ ± Body groundIgnition switch ONBelow 1 V
D2± ± Body groundIgnition switch ONBelow 1 V
PREPARATION:
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (±) terminal cable from the bat-
tery, and wait for at least 90 seconds.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
D2+ ± D2±AlwaysBelow 1 W
D2+ ± Body groundAlways1 MW or higher
D2± ± body groundAlways1 MW or higher
PREPARATION:
Release the activation prevention mechanism built into con-
nector ºDº (see page DI±1137).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
D2+ ± D2±Always1 MW or higher
NG Replace spiral cable (see page RS±21).
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 (see page DI±1137).
Page 1607 of 4323
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1405
1599 Author: Date:
2005 SEQUOIA (RM1146U)
HINT:
Perform the simulation method by selecting the check mode with the hand±held tester (see page
DI±1151).
After selecting the check mode, perform the simulation method by wiggling each connector of the air-
bag system or driving the vehicle on a city or rough road (see page DI±1151).
Page 1608 of 4323

DI±1406
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1600 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1815/54 Short in P Squib (Dual stage ± 2nd step)
Circuit
DTC B1816/54 Open in P Squib (Dual stage ± 2nd step)
Circuit
DTC B1817/54 Short in P Squib (Dual stage ± 2nd step)
Circuit (to Ground)
DTC B1818/54 Short in P Squib (Dual stage ± 2nd step)
Circuit (to B+)
CIRCUIT DESCRIPTION
The P squib (Dual stage ± 2nd step) circuit consists of the airbag sensor assembly and the front passenger
airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the P squib (Dual stage ± 2nd step) circuit.
DTC No.DTC Detection ConditionTrouble Area
B1815/54
The airbag sensor assembly receives a line short circuit
signal 5 times in the P squib (Dual stage ± 2nd step) cir-
cuit during primary check.
P squib malfunction
Airbag sensor assembly malfunctionFront passenger airbag assembly (P squib, Dual stage ± 2nd
step)
Airbag sensor assembly
Cowl wire
B1816/54
The airbag sensor assembly receives an open circuit sig-
nal in the P squib (Dual stage ± 2nd step) circuit for 2 se-
conds.
P squib malfunction
Airbag sensor assembly malfunctionFront passenger airbag assembly (P squib, Dual stage ± 2nd
step)
Airbag sensor assembly
Cowl wire
B1817/54
The airbag sensor assembly receives a short circuit to
ground signal in the P squib (Dual stage ± 2nd step) circuit
for 0.5 seconds.
P squib malfunction
Airbag sensor assembly malfunctionFront passenger airbag assembly (P squib, Dual stage ± 2nd
step)
Airbag sensor assembly
Cowl wire
B1818/54
The airbag sensor assembly receives a short to B+ circuit
signal in the P squib (Dual stage ± 2nd step) circuit for 0.5
seconds.
P squib malfunction
Airbag sensor assembly malfunctionFront passenger airbag assembly (P squib, Dual stage ± 2nd
step)
Airbag sensor assembly
Cowl wire
DIDHL±01