2001 TOYOTA HIGHLANDER o2 sensor

H03352C81305H43424
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
Service Wire
A
B
C D E F
-SR+SR
A9
IK1
H03354C81305H43447
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
A
B
C D E F
IK1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1337
1527 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 CHECK ENGINE ROOM MAIN WIRE(OPEN)
(a) Disconnect the engine room main wire connector from the
cowl wire.
HINT:
Connector ºEº has already been inserted into the service wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
IK1-4 (-SR)AlwaysBelow 1 W
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE
9 CHECK ENGINE ROOM MAIN WIRE(TO B+)
(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.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
Body groundIgnition switch ONBelow 1 V
IK1-4 (-SR) -
Body groundIgnition switch ONBelow 1 V
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE

H03354C81305H43447
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
A
B
C D E F
IK1
H03354C81305H43447
Engine Room
Main Wire
Airbag
Sensor
Assy
CenterAirbag
Front
RH
Sensor
Cowl Wire
-SR+SR
A
B
C D E F
IK1
05-1338
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1528 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 CHECK ENGINE ROOM MAIN WIRE(TO GROUND)
(a) Disconnect the engine room main wire connector from the
cowl wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
Body groundAlways1 MW or Higher
IK1-4 (-SR) -
Body groundAlways1 MW or Higher
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE
11 CHECK ENGINE ROOM MAIN WIRE(SHORT)
(a) Disconnect the engine room main wire connector from the
cowl wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-3 (+SR) -
IK1-4 (-SR)Always1 MW or Higher
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE

H02750
Airbag Sensor Assy Center
+SL
-SL 15
26 2
1 +SL
-SLA17 W-R
BRIK1
IK11 2
A17 A8
Airbag Sensor Front LH
G
R
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1339
1529 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1149/37 FRONT AIRBAG SENSOR (LH)
MALFUNCTION
CIRCUIT DESCRIPTION
The airbag sensor front LH circuit consists of the diagnostic circuit and the frontal deceleration sensor, etc.
If the airbag sensor assy center receives signals from the frontal deceleration sensor, it judges whether or
not the SRS should be activated.
DTC B1149/37 is recorded when a malfunction is detected in the airbag sensor front LH circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1149/37

Short circuit in front airbag sensor LH wire harness (to B+)

Short circuit in front airbag sensor LH wire harness (to
ground)

Open circuit in +SL wire harness or -SL wire harness of
front airbag sensor LH

Airbag sensor front LH malfunction

Airbag sensor assy center malfunction

Airbag sensor front LH

Airbag sensor assy center

Cowl wire

Engine room main wire
WIRING DIAGRAM
05IVO-02

H10600 H02757H16835H10600 H02757H16835H42119
Airbag
Sensor
Front LHAirbag
Sensor
Assy
Center
DLC3
CG
TCDTC B1149/37
05-1340
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1530 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK DTC
(a) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(b) Clear the DTCs stored in memory (see page 05-1215).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Check the DTCs (see page 05-1215).
OK:
DTC B1149/37 is not output.
HINT:
Codes other than code B1149/37 may be output at this time, but
they are not related to this check.
NG Go to step 2
OK
USE SIMULATION METHOD TO CHECK
2 CHECK CONNECTION OF CONNECTORS
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connector is properly connected to the airbag sensor assy center and the airbag sensor
front LH.
OK:
The connectors are connected.
NG CONNECT CONNECTORS, THEN GO TO STEP
1
OK

H03353C81408H08016H03353C81408H08016H41800
Airbag
Sensor
Assy
Center
Airbag Sensor
Front LH
Service Wire
+SL
-SLA
B
C
D E F
-SL +SLA8A17
H03355C81408H03355C81408H42510
Airbag
Sensor
Assy
Center
Airbag Sensor
Front LH
+SL
-SLA
B C
D E F
A17
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1341
1531 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK FRONT AIRBAG SENSOR (LH) CIRCUIT (OPEN)
(a) Disconnect the connectors from the airbag sensor assy
center and the airbag sensor front LH.
(b) Using a service wire, connect A8-2 (+SL) and A8-1 (-SL)
of connector ºEº.
NOTICE:
Do not forcibly insert a service wire into the terminals of the
connector when connecting.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A17-15 (+SL) -
A17-26 (-SL)AlwaysBelow 1 W
NG Go to step 8
OK
4 CHECK FRONT AIRBAG SENSOR (LH) CIRCUIT (TO B+)
(a) Disconnect the service wire from connector ºEº.
(b) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
A17-15 (+SL) -
Body groundIgnition switch ONBelow 1 V
A17-26 (-SL) -
Body groundIgnition switch ONBelow 1 V
NG Go to step 9
OK

H03355C81408H03355C81408H42510
Airbag
Sensor
Assy
Center
Airbag Sensor
Front LH
+SL
-SLA
B C D E F
A17
H03355C81408H03355C81408H42510
Airbag
Sensor
Assy
Center
Airbag Sensor
Front LH
+SL
-SLA
B C D E F
A17
05-1342
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1532 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 CHECK FRONT AIRBAG SENSOR (LH) CIRCUIT (TO GROUND)
(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) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A17-15 (+SL) -
Body groundAlways1 MW or Higher
A17-26 (-SL) -
Body groundAlways1 MW or Higher
NG Go to step 10
OK
6 CHECK FRONT AIRBAG SENSOR (LH) CIRCUIT (SHORT)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A17-15 (+SL) -
A17-26 (-SL)Always1 MW or Higher
NG Go to step 11
OK

H02757H10600 H16834H16835
H02757H10600 H16834H16835
H02757H10600 H16834H16835H42120
Airbag
Sensor
Assy
CenterAirbag
Front
RH Sensor
DLC3
CG TCDTC B1148/36
DTC B1149/37
DC
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1343
1533 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7 CHECK AIR BAG SENSOR FRONT LH
(a) Connect the connector to the airbag sensor assy center.
(b) Interchange the airbag front sensor RH with the airbag
sensor front LH and connect the connectors to them.
(c) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(d) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(e) Clear the DTCs stored in memory (see page 05-1215).
(f) Turn the ignition switch to the LOCK position.
(g) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(h) Check the DTCs (see page 05-1215).
Result:
NG: ADTC B1149/37 is output.
NG: BDTC B1148/36 is output.
OKDTC B1148/36 and B1149/37 are not
output.
NG:A REPLACE AIR BAG SENSOR ASSY CENTER
(SEE PAGE 60-53)
NG:B REPLACE AIR BAG SENSOR FRONT LH
(SEE PAGE 60-55)
OK
USE SIMULATION METHOD TO CHECK

H03352C81305H43424
Engine Room
Main Wire
Service Wire
Airbag
Sensor
Assy
Center
Airbag Sensor
Front LH
A
B C
D E FCowl Wire
-SL+SLA8
IK1
-SL+SL
H03354C81305H43447
Engine Room
Main Wire
-SL
+SLAirbag
Sensor
Assy
Center
Airbag Sensor
Front LH
A
B C D E FCowl Wire
IK1
05-1344
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1534 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 CHECK ENGINE ROOM MAIN WIRE(OPEN)
(a) Disconnect the engine room main wire connector from the
cowl wire.
HINT:
Connector ºEº has already been inserted into the service wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
IK1-1 (-SL) -
IK1-2 (+SL)AlwaysBelow 1 W
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE
9 CHECK ENGINE ROOM MAIN WIRE(TO B+)
(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.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
IK1-1 (-SL) -
Body groundIgnition switch ONBelow 1 V
IK1-2 (+SL) -
Body groundIgnition switch ONBelow 1 V
NG REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE
OK
REPAIR OR REPLACE COWL WIRE