2001 TOYOTA SEQUOIA engine

DIDGQ±01
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1155
1349 Author: Date:
2005 SEQUOIA (RM1146U)
DIAGNOSTIC TROUBLE CODE CHART
1. DTCS FOR SUPPLEMENTAL RESTRAINT SYSTEM
If a trouble code is displayed during the DTC check, check the circuit listed for the code in the table below
(Proceed to the page listed for that circuit).
HINT:

When the SRS warning light remains on and the DTC output is the normal system code, a voltage
source drop is likely to occur. This malfunction is not stored in the memory by the airbag sensor assem-
bly. If the power source voltage returns to normal, the SRS warning light will automatically go off.

When 2 or more codes are indicated, the code with the lower number appears first.

If a code is not listed on the display chart, the airbag sensor assembly may have failed.

In the case of any malfunction concerning an open circuit, short to ground, or short to B+ due to a squib,
other malfunction codes may not be detected. In this case, repair the malfunction currently indicated
and then perform malfunction diagnosis again.

Mark in the check mode column:
ºº: DTC is corresponding to the check mode.
º º: DTC is not corresponding to the check mode.

When the DTC B1650/32 is detected as a result of troubleshooting for the Supplemental Restraint Sys-
tem, perform troubleshooting for the occupant classification system as shown in the chart below.
DTC No.
(See
Page)
Detection ItemTrouble AreaCheck ModeSRS
Warning Light
B1000/31
(DI±1161)
Airbag sensor assembly malfunction
Airbag sensor assemblyON
B1610/13
(DI±1162)
Front airbag sensor RH malfunction

Front airbag sensor RH

Airbag sensor assembly

Cowl wire

Engine room main wire
ON
B1615/14
(DI±1171)
Front airbag sensor LH malfunction

Front airbag sensor LH

Airbag sensor assembly

Cowl wire

Engine room main wire
ON
B1620/21
(*1)
(DI±1180)

Side airbag sensor assembly RH malfunction

Side airbag sensor assembly RH

Airbag sensor assembly

Floor wire
ON
B1625/22
(*1)
(DI±1186)

Side airbag sensor assembly LH malfunction

Side airbag sensor assembly LH

Airbag sensor assembly

Floor wire No. 2
ON
B1630/23
(*1)
(DI±1192)

Curtain shield airbag sensor RH malfunction

Curtain shield airbag sensor assembly RH

Airbag sensor assembly

Floor wire
ON
B1635/24
(*1)
(DI±1198)

Curtain shield airbag sensor LH malfunction

Curtain shield airbag sensor assembly LH

Airbag sensor assembly

Floor wire No. 2
ON
B1650/32
(DI±1204)
Occupant classification system malfunction

Occupant classification system

Airbag sensor assembly

Floor wire

Seat wire No. 1
ON
B1653/35
(DI±1213)
Seat position sensor assembly malfunction

Seat position airbag sensor assembly

Airbag sensor assembly

Floor wire No. 2
ON

H02750
Airbag Sensor Assembly
A20+SR 29
IL31
IL32
A2027 A12
Front Airbag Sensor RH
2
1±SR W
W
BB +SR
±SR DI±1162
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1356 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1610/13 Front Airbag Sensor RH Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor RH consists of the diagnosis circuit, the frontal deceleration sensor, etc.
If the airbag sensor assembly receives signals from the frontal deceleration sensor, it determines whether
or not the SRS should be activated.
DTC B1610/13 is recorded when a malfunction is detected in the front airbag sensor RH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1610/13

The airbag sensor assembly receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
nal or a short circuit to B+ signal in the front airbag sensor
RH circuit for 2 seconds.

Front airbag sensor RH malfunction

Airbag sensor assembly malfunction

Front airbag sensor RH

Airbag sensor assembly

Cowl wire

Engine room main wire
WIRING DIAGRAM
DIDGS±01

H23631H03352H23983H24011
Airbag
Sensor
Assembly Front Airbag
Sensor RH
Engine Room Main Wire
A
B
C D E F
Service Wire
Cowl Wire
+SR±SR
A12IL3
+SR ±SR
H03354H23983H24012
Airbag
Sensor
Assembly
+SR±SRA
B D E
C F
Front Airbag
Sensor RH
Cowl WireEngine Room Main Wire
IL3
DI±1168
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1362 Author: Date:
2005 SEQUOIA (RM1146U)
8 Check engine room main wire (open).
PREPARATION:
Disconnect the engine room main wire connector from the cowl
wire.
HINT:
The service wire has already been inserted into connector ºEº.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
IL3±1 (+SR) ±
IL3±2 (±SR)AlwaysBelow 1 W
NG Repair or replace engine room main wire.
OK
Repair or replace cowl wire.
9 Check engine room main wire (short).
PREPARATION:
Disconnect the engine room main wire connector from the cowl
wire.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
IL3±1 (+SR) ±
IL3±2 (±SR)Always1 MW or higher
NG Repair or replace engine room main wire.
OK
Repair or replace cowl wire.

H03354H23983H24012
Airbag
Sensor
Assembly
+SR±SRA
B D E
C F
Front Airbag
Sensor RH
Cowl WireEngine Room Main Wire
IL3
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1169
1363 Author: Date:
2005 SEQUOIA (RM1146U)
10 Check engine room main 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 engine room main wire connector from the
cowl wire.
(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
IL3±1 (+SR) ±
Body groundIgnition switch ONBelow 1 V
IL3±2 (±SR) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace engine room main wire.
OK
Repair or replace cowl wire.

H03354H23983H24012
Airbag
Sensor
Assembly
+SR±SRA
B D E
C F
Front Airbag
Sensor RH
Cowl WireEngine Room Main Wire
IL3
DI±1170
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1364 Author: Date:
2005 SEQUOIA (RM1146U)
11 Check engine room main wire (short to ground).
PREPARATION:
Disconnect the engine room main wire connector from the cowl
wire.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
IL3±1 (+SR) ±
Body groundAlways1 MW or higher
IL3±2 (±SR) ±
Body groundAlways1 MW or higher
NG Repair or replace engine room main wire.
OK
Repair or replace cowl wire.

H02750
Airbag Sensor Assembly
A20+SL 30
IA31
IA32
A2028 A11
Front Airbag Sensor LH
2
1±SL W
W
BB +SL
±SL
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1171
1365 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1615/14 Front Airbag Sensor LH Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor LH consists of the diagnosis circuit, the frontal deceleration sensor, etc.
If the airbag sensor assembly receives signals from the frontal deceleration sensor, it determines whether
or not the SRS should be activated.
DTC B1615/14 is recorded when a malfunction is detected in the front airbag sensor LH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1615/14

The airbag sensor assembly receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
nal or a short circuit to B+ signal in the front airbag sensor
LH circuit for 2 seconds.

Front airbag sensor LH malfunction

Airbag sensor assembly malfunction

Front airbag sensor LH

Airbag sensor assembly

Cowl wire

Engine room main wire
WIRING DIAGRAM
DIDGT±01

H23631H03352H23983H24011
Airbag
Sensor
Assembly Front Airbag
Sensor LH
Engine Room Main Wire
A
B
C D E F
Service Wire
Cowl Wire
+SL±SL
A11IA3
+SL ±SL
H03354H23983H24012
Airbag
Sensor
Assembly
+SL±SLA
B D E
C F
Front Airbag
Sensor LH
Cowl WireEngine Room Main Wire
IA3
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1177
1371 Author: Date:
2005 SEQUOIA (RM1146U)
8 Check engine room main wire (open).
PREPARATION:
Disconnect the engine room main wire connector from the cowl
wire.
HINT:
The service wire has already been inserted into connector ºEº.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
IA3±1 (+SL) ±
IA3±2 (±SL)AlwaysBelow 1 W
NG Repair or replace engine room main wire.
OK
Repair or replace cowl wire.
9 Check engine room main wire (short).
PREPARATION:
Disconnect the engine room main wire connector from the cowl
wire.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
IA3±1 (+SL) ±
IA3±2 (±SL)Always1 MW or higher
NG Repair or replace engine room main wire.
OK
Repair or replace cowl wire.

H03354H23983H24012
Airbag
Sensor
Assembly
+SL±SLA
B D E
C F
Front Airbag
Sensor LH
Cowl WireEngine Room Main Wire
IA3
DI±1178
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1372 Author: Date:
2005 SEQUOIA (RM1146U)
10 Check engine room main 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 engine room main wire connector from the
cowl wire.
(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
IA3±1 (+SL) ±
Body groundIgnition switch ONBelow 1 V
IA3±2 (±SL) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace engine room main wire.
OK
Repair or replace cowl wire.