o2 sensor TOYOTA HIGHLANDER 2001 Service Repair Manual

- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1507
1697 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7 RECHECK DTC
(a) Connect the occupant classification ECU connector and the 4 occupant classification sensor connec-
tors.
(b) Connect the negative (-) terminal cable to the battery.
(c) Turn the ignition switch to the ON position.
(d) Clear the DTCs stored in memory (see page 05-1215).
HINT:

First clear DTCs stored in the occupant classification ECU memory and then in the airbag sensor assy
center memory.

Use the hand-held tester to clear the DTC of the occupant classification ECU, otherwise the DTC can-
not be cleared.
(e) Turn the ignition switch to the LOCK position.
(f) Turn the ignition switch to the ON position.
(g) Using the hand-held tester, check the DTCs (see page 05-1215).
OK:
DTC B1793 is not output.
HINT:
Codes other than code B1793 may be output at this time, but they are not related to this check.
NG Go to step 8
OK
USE SIMULATION METHOD TO CHECK (SEE PAGE 05-1207)
8 REPLACE OCCUPANT CLASSIFICATION ECU
(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) Replace the occupant classification ECU (see page 60-64).
HINT:
Perform the inspection using parts from a normal vehicle when possible.
9 PERFORM ZERO POINT CALIBRATION
(a) Using the hand-held tester, perform ºZero point calibrationº (see page 05-1203).
OK:
The ºCOMPLETEDº is displayed.
NG Go to step 12
OK

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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 PERFORM SENSITIVITY CHECK
(a) Using the hand-held tester, perform ºSensitivity checkº (see page 05-1203).
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
NG Go to step 12
OK
11 RECHECK DTC
(a) Connect the negative (-) terminal cable to the battery.
(b) Turn the ignition switch to the ON position.
(c) Clear the DTCs stored in memory (see page 05-1215).
HINT:

First clear DTCs stored in the occupant classification ECU memory and then in the airbag sensor assy
center memory.

Use the hand-held tester to clear the DTC of the occupant classification ECU, otherwise the DTC can-
not be cleared.
(d) Turn the ignition switch to the LOCK position.
(e) Turn the ignition switch to the ON position.
(f) Using the hand-held tester, check the DTCs (see page 05-1215).
OK:
DTC B1793 is not output.
HINT:
Codes other than code B1793 may be output at this time, but they are related to this check.
NG Go to step 12
OK
END
12 REPLACE SEAT ADJUSTER FRAME ASSY
(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) Replace the seat adjuster frame assy (see page 72-1 1, 72-19).
13 CHECK PERFORM ZERO POINT CALIBRATION
(a) Using the hand-held tester, perform ºZero point calibrationº (see page 05-1203).
OK:
The ºCOMPLETEDº is displayed.

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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1795 OCCUPANT CLASSIFICATION ECU
MALFUNCTION
CIRCUIT DESCRIPTION
DTC B1795 is recorded when a malfunction is detected in the occupant classification ECU.
Troubleshoot DTC B1771 first when the DTC B1771 and B1795 are output simultaneously.
DTC No.DTC Detecting ConditionTrouble Area
B1795

Occupant classification ECU circuit malfunction

Occupant classification ECU malfunction

When the occupant classification ECU receives a short to
ground signal in the passenger side buckle switch circuit
for 2 seconds.

The occupant classification ECU receives the ignition
switch LOCK to ON signal 50 times in a row when a mal-
function occurs in the power circuit for the occupant clas-
sification ECU (LOCK to ON to LOCK should be counted
as once).

Occupant classification ECU

Front seat wire RH

ECU-B Fuse

Front seat inner belt assy RH (Buckle switch RH)
HINT:

When DTC B1150/23 is detected as a result of troubleshooting for the supplemental restraint system,
perform troubleshooting for DTC B1795 of the occupant classification sensor.

Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC
cannot be read.
05IX0-03

- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1796 SLEEP OPERATION FAILURE OF
OCCUPANT CLASSIFICATION ECU
CIRCUIT DESCRIPTION
During sleep mode, the occupant classification ECU reads the condition of each sensor while the ignition
switch is off. In this mode, if occupant classification ECU detects an internal malfunction, DTC B1796 is out-
put.
DTC No.DTC Detecting ConditionTrouble Area
B1796
Occupant classification ECU malfunction
Occupant classification ECU
HINT:

When DTC B1150/23 is detected as a result of troubleshooting for the supplemental restraint system,
perform troubleshooting for the DTC B1796 of the occupant classification ECU.

Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC
cannot be read.
INSPECTION PROCEDURE
1 CHECK DTC
(a) Turn the ignition switch to the ON position.
(b) Clear the DTCs stored in memory (see page 05-1215).
HINT:

First clear DTCs stored in the occupant classification ECU memory and then in the airbag sensor assy
center memory.

Use the hand-held tester to check the DTC of the occupant classification ECU, otherwise the DTC
cannot be cleared.
(c) Turn the ignition switch to the LOCK position, and wait for at least 10 seconds.
(d) Turn the ignition switch to the ON position.
(e) Using the hand-held tester, check the DTCs (see page 05-1215).
OK:
DTC B1796 is not output.
HINT:
Codes other than code B1796 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 (SEE PAGE 05-1207)
05IX1-01

H10600H10600H10600H41086
DLC3DTC B1100/31
CG
TC
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1100/31 AIRBAG SENSOR ASSY CENTER
MALFUNCTION
CIRCUIT DESCRIPTION
The airbag sensor assy center consists of a airbag sensor assy center, safing sensor, drive circuit, diagnosis
circuit and ignition control, etc.
It receives signals from the airbag sensor, judges whether or not the SRS must be activated, and detects
diagnosis system malfunction.
DTC B1100/31 is recorded when occurrence of a malfunction in the airbag sensor assy center is detected.
DTC No.DTC Detecting ConditionTrouble Area
B1100/31
Airbag sensor assy center malfunction
Airbag sensor assy center
HINT:
When a trouble code is displayed simultaneously with B1100/31, repair the malfunction indicated by this
code (except B1100/31) first.
INSPECTION PROCEDURE
1 CHECK AIR BAG SENSOR ASSY CENTER
(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 B1100/31 is not output.
NG REPLACE AIR BAG SENSOR ASSY CENTER
(SEE PAGE 60-53)
OK
USE SIMULATION METHOD TO CHECK
05IVG-01

H40997
DLC3DTC B1135/24
CG
TCAirbag
Sensor
Assy
Center
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1135/24 HALF CONNECTION IN AIRBAG SENSOR
ASSY CENTER CONNECTORS
CIRCUIT DESCRIPTION
The airbag sensor assy center detects partial connection of connector.
DTC B1135/24 is recorded when the airbag sensor assy center detects an open in the electrical connection
check mechanism of the airbag sensor connector or in the airbag sensor circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1135/24

Malfunction of electrical connection check mechanism of
airbag sensor assy center connector

Airbag sensor assy center malfunction
Electrical connection check mechanism

Airbag sensor assy center
INSPECTION PROCEDURE
1 CHECK AIRBAG SENSOR ASSY CENTER CONNECTOR
(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 the connection of the airbag sensor assy center connectors.
OK:
The connectors are connected.
HINT:
When the connectors are not firmly connected, disconnect them once and reconnect them securely.
2 CHECK AIR BAG SENSOR ASSY CENTER
(a) Connect the negative (-) terminal cable to the battery,
and wait at least for 2 seconds.
(b) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(c) Clear the DTCs stored in memory (see page 05-1215).
(d) Turn the ignition switch to the LOCK position.
(e) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(f) Check the DTCs (see page 05-1215).
OK:
DTC B1135/24 is not output.
HINT:
Codes other than code B1135/24 may be output at this time, but
they are not related to this check.
NG Go to step 3
OK
USE SIMULATION METHOD TO CHECK
05262-05

C83399
C81406H41456
Disconnection Detection Pin
w/ Side and Curtain Shield Airbag: w/o Side and Curtain Shield Airbag:
Disconnection Detection Pin
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 PERFORM A VISUAL CHECK OF THE DISCONNECTION DETECTION PIN
(a) Check the disconnection detection pin of the connector.
HINT:
Compare one connector with the other 2 connectors.
OK:
No deformation is identified.
NG REPAIR OR REPLACE AIRBAG SENSOR ASSY
CENTER CONNECTOR
OK
REPLACE AIR BAG SENSOR ASSY CENTER (SEE PAGE 60-53)

H43054
S17
Side Airbag Sensor Assy RH
Airbag Sensor Assy Center
B
W
G
R ESR
VUPR
SSR+
SSR-1
4
3
2A1815
17
16
13ESR
VUPR
SSR+
SSR- A18
A18
A18 (*1)
(*1)
(*1)
(*1)
*1: w/ Curtain Shield Airbag 05-1322
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1140/32 SIDE AIRBAG SENSOR ASSY (RH)
MALFUNCTION
The side airbag sensor assy RH consists of the safing sensor, diagnosis circuit and lateral deceleration sen-
sor, etc.
It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated,
and detects diagnosis system malfunction.
DTC B1140/32 is recorded when occurrence of a malfunction in the side airbag sensor assy RH (RH) is de-
tected.
DTC No.DTC Detecting ConditionTrouble Area
B1140/32
Side airbag sensor assy RH circuit malfunction

Side airbag sensor assy RH

Floor wire

Airbag sensor assy center
WIRING DIAGRAM
05IVK-01

H10600H01012
H01065H10600H01012
H01065H40442
Side
Airbag
Sensor
Assy RHAirbag
Sensor
Assy
Center
DLC3
CG TC
DTC B1140/32
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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1513 Author
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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 B1140/32 is not output.
HINT:
Codes other than code B1140/32 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 at least for 90 seconds.
(c) Check that the connector is properly connected to the airbag sensor assy center and the side airbag
sensor assy RH.
NG CONNECT CONNECTORS, THEN GO TO STEP
1
OK

H01015
C91384
C91385 C82599H01015
C91384
C91385 C82599
H42483
Airbag
Sensor
Assy
Center
ESR
VUPR
SSR+
SSR- Side Airbag
Sensor Assy RHFloor Wire
SST
D
CBA
ESR
VUPRSSR+ SSR- S17
A18
H01015C83438H01015C83438H42229
Airbag
Sensor
Assy
Center
ESR
VUPR
SSR+Floor Wire
Side Airbag
Sensor Assy RHD
CBA
SSR-
A18
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK FLOOR WIRE(OPEN)
(a) Disconnect the connectors from the airbag sensor assy
center and the side airbag sensor assy RH.
(b) Using SST, connect S17-4 (VUPR) and S17-1 (ESR),
and connect S17-3 (SSR+) and S17-2 (SSR-) of con-
nector ºCº.
SST 09843-18040
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A18-17 (VUPR) -
A18-15 (ESR)AlwaysBelow 1 W
A18-16 (SSR+) -
A18-13 (SSR-)AlwaysBelow 1 W
NG REPAIR OR REPLACE FLOOR WIRE
OK
4 CHECK FLOOR WIRE(TO GROUND)
(a) Disconnect the SST from connector ºCº.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A18-17 (VUPR) -
Body groundAlways1 MW or Higher
A18-15 (ESR) -
Body groundAlways1 MW or Higher
A18-16 (SSR+) -
Body groundAlways1 MW or Higher
A18-13 (SSR-) -
Body groundAlways1 MW or Higher
NG REPAIR OR REPLACE FLOOR WIRE
OK