TOYOTA HIGHLANDER 2001 Service Repair Manual

H41715H44130 H44536H43694H44681
Occupant
Classification ECUAirbag
Sensor
Assy
Center
FSR+ F
CBA
ED
FSR-
FSR-FSR+
Service Wire
O6
A18 A18
(*1) (*2) FSR-
FSR+
*1: w/ Side and Curtain Shield Airbag
*2: w/o Side and Curtain Shield Airbag
H41715H44130H44536
Occupant
Classification ECU
FAirbag
Sensor
Assy
Center A
FSR-
FSR+ EDCB
A18
FSR-FSR+
A18
w/ Side and Curtain
Shield Airbagw/o Side and Curtain
Shield Airbag
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT(OPEN)
(a) Disconnect the connectors from the airbag sensor assy
center and the occupant classification ECU.
(b) Using a service wire, connect O6-8 (FSR+) and O6-4
(FSR-) 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:
w/ Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-3 (FSR+) -
A18-10 (FSR-)AlwaysBelow 1 W
w/o Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-1 (FSR+) -
A18-2 (FSR-)AlwaysBelow 1 W
NG Go to step 8
OK
5 CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT (SHORT)
(a) Disconnect the service wire from connector ºEº.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
w/ Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-3 (FSR+) -
A18-10 (FSR-)Always1 MW or Higher
w/o Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-1 (FSR+) -
A18-2 (FSR-)Always1 MW or Higher
NG Go to step 9
OK

H41715H44130H44536
Occupant
Classification ECU
FAirbag
Sensor
Assy
Center A
FSR-
FSR+ EDCB
A18
FSR-FSR+
A18
w/ Side and Curtain
Shield Airbagw/o Side and Curtain
Shield Airbag
H41715H44130H44536
Occupant
Classification ECU
FAirbag
Sensor
Assy
Center A
FSR-
FSR+ EDCB
A18
FSR-FSR+
A18
w/ Side and Curtain
Shield Airbagw/o Side and Curtain
Shield Airbag
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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6 CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT (TO B+)
(a) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the table
below.
Standard:
w/ Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-3 (FSR+) -
Body groundIgnition switch ONBelow 1 V
A18-10 (FSR-) -
Body groundIgnition switch ONBelow 1 V
w/o Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-1 (FSR+) -
Body groundIgnition switch ONBelow 1 V
A18-2 (FSR-) -
Body groundIgnition switch ONBelow 1 V
NG Go to step 10
OK
7 CHECK OCCUPANT CLASSIFICATION ECU 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:
w/ Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-3 (FSR+) -
Body groundAlways1 MW or Higher
A18-10 (FSR-) -
Body groundAlways1 MW or Higher
w/o Side and curtain shield airbag:
Tester connectionConditionSpecified condition
A18-1 (FSR+) -
Body groundAlways1 MW or Higher
A18-2 (FSR-) -
Body groundAlways1 MW or Higher
NG Go to step 11
OK
REPLACE AIR BAG SENSOR ASSY CENTER (SEE PAGE 60-53)

H03354H43116 H43129H44538
Occupant
Classification
ECUFront Seat
Wire RHFloor Wire
Airbag
Sensor
Assy
Center A
B C D E F
FSR-
FSR+
FSR+
FSR-
O6BL1
Service Wire
H03354H43116H03354H43116H43129
Occupant
Classification
ECUFront Seat
Wire RHFloor Wire
Airbag
Sensor
Assy
Center A
B C D E F
FSR-
FSR+
BL1
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8 CHECK FRONT SEAT WIRE RH(OPEN)
(a) Disconnect the front seat wire RH connector from the floor
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
BL1-1 (FSR+) -
BL1-4 (FSR-)AlwaysBelow 1 W
NG REPAIR OR REPLACE FRONT SEAT WIRE RH
OK
REPAIR OR REPLACE FLOOR WIRE
9 CHECK FRONT SEAT WIRE RH(SHORT)
(a) Disconnect the front seat wire RH connector from the floor
wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
BL1-1 (FSR+) -
BL1-4 (FSR-)Always1 MW or Higher
NG REPAIR OR REPLACE FRONT SEAT WIRE RH
OK
REPAIR OR REPLACE FLOOR WIRE

H03354H43116H03354H43116H43129
Occupant
Classification
ECUFront Seat
Wire RHFloor Wire
Airbag
Sensor
Assy
Center A
B C D E F
FSR-
FSR+
BL1
H03354H43116H03354H43116H43129
Occupant
Classification
ECUFront Seat
Wire RHFloor Wire
Airbag
Sensor
Assy
Center A
B C D E F
FSR-
FSR+
BL1
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 CHECK FRONT SEAT WIRE RH(TO B+)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from battery,
and wait for at least 90 seconds.
(c) Disconnect the front seat wire RH connector from the floor
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
BL1-1 (FSR+) -
Body groundIgnition switch ONBelow 1 V
BL1-4 (FSR-) -
Body groundIgnition switch ONBelow 1 V
NG REPAIR OR REPLACE FRONT SEAT WIRE RH
OK
REPAIR OR REPLACE FLOOR WIRE
11 CHECK FRONT SEAT WIRE RH(TO GROUND)
(a) Disconnect the front seat wire RH connector from the floor
wire.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
BL1-1 (FSR+) -
Body groundAlways1 MW or Higher
BL1-4 (FSR-) -
Body groundAlways1 MW or Higher
NG REPAIR OR REPLACE FRONT SEAT WIRE RH
OK
REPAIR OR REPLACE FLOOR WIRE

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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1152/28 PASSENGER AIRBAG ON/OFF INDICATOR
LIGHT CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
The passenger airbag ON/OFF indicator light circuit consists of the airbag sensor assy center and the telltale
lamp assy (passenger airbag ON/OFF indicator).
This circuit indicates the operation condition of the front passenger airbag assy and the front seat airbag assy
RH and passenger side seat belt pretensioner.
DTC B1152/28 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator light
circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1152/28

When the airbag sensor assy center receives a line short
signal, open signal, short to ground signal or B+ short
signal in the passenger airbag ON/OFF indicator light cir-
cuit for 2 seconds.

Telltale lamp assy malfunction

Airbag sensor assy center malfunction

Telltale lamp (Passenger airbag ON/OFF indicator)

Airbag sensor assy center

Cowl wire
05IVQ-02

H44547
T15
Telltale Light assemblyAirbag Sensor
Assy Center
P-AB A17
1 25
Y
P-ABInstrument Panel J/B
SW1 PAON
A17 W
W-B
W IL1
3F11
14
W-B
IG+PAON
LG
B
AIRBAG ON
AIRBAG OFF
7
2
5
41L
1L 1E
1K2 58
Instrument Panel J/B
3A10 13 10
6 3F
3FCenter J/B
AM1 IG12 4 I15 Ignition SW
WG RGR
B F7
F/L Block
ALT 12AM1IG1
17
6 10
12 1K
1C 1C
1A
IB FL MAIN
Battery
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

H43700
AB C
ON
OFF
ON
ON OFF
OFF4 sec.
4 sec. 2 sec.2 sec. Ignition Switch
Passenger Airbag
ON/OFF Indicator Light
(ºONº)
Passenger Airbag
ON/OFF Indicator Light
(ºOFFº)
ON/OFF condition depends on the
front passenger detection results.
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INSPECTION PROCEDURE
1 CHECK PASSENGER AIRBAG ON/OFF INDICATOR LIGHT OPERATION
(a) Turn the ignition switch to the ON position.
(b) Check the passenger airbag ON/OFF indicator light operation.
HINT:
Refer to the normal condition of the passenger airbag ON/OFF indicator light (see page 05-1207).
Result:
A:
During period ºAº in the illustration, even if both the ºONº and ºOFFº passenger airbag ON/OFF
indicator lights normally come on, both of them do not go off during period ºBº.
During periods ºAº and ºBº in the illustration, even if both the ºONº and ºOFFº passenger air-
bag ON/OFF indicator lights normally come on, both of them come on during period ºCº.
B:
During period ºAº, neither the ºONº nor ºOFFº passenger airbag ON/OFF indicator lights come
on, or one of them does not come on.
During period ºCº, even if the front passenger seat is occupied, neither the ºONº nor ºOFFº
passenger airbag ON/OFF indicator lights come on.
B Go to step 6
A

H44095
H01015G27651H43468H40065H44539
Telltale
Lamp
AssyAirbag
Sensor
Assy
Center CB
PAONP-AB
A17
DA
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK TELLTALE LAMP ASSY (PASSENGER AIRBAG ON/OFF INDICATOR
LIGHT)
(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 connector from the telltale lamp assy.
(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) Check the passenger airbag ON/OFF indicator light op-
eration.
OK:
The passenger airbag ON/OFF indicator light (ºONº
and ºOFFº) do not come on.
NG REPLACE TELLTALE LAMP ASSY
(SEE PAGE 71-10)
OK
3 CHECK WIRE HARNESS (TO GROUND)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A17-1 (P-AB) -
Body groundAlways1 MW or Higher
A17-25 (PAON) -
Body groundAlways1 MW or Higher
NG REPAIR OR REPLACE WIRE HARNESS
OK

H01015G27651H43468H40065H44539
Telltale
Lamp
AssyAirbag
Sensor
Assy
Center CB
PAONP-AB
A17
DA
H10600H01012H01069H43467H43087
H44541
Telltale
Lamp
AssyAirbag
Sensor
Assy
Center
CGTC DLC3
DTC B1152/28
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK WIRE HARNESS (SHORT)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A17-1 (P-AB) -
A17-25 (PAON)Always1 MW or Higher
NG REPAIR OR REPLACE WIRE HARNESS
OK
5 CHECK AIR BAG SENSOR ASSY CENTER
(a) Connect the connectors to the airbag sensor assy center.
(b) Connect the connector to the clock assy.
(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).
OK:
DTC B1152/28 is not output.
HINT:
Codes other than code B1152/28 may be output at this time, but
they are not related to this check.
NG REPLACE AIR BAG SENSOR ASSY CENTER
(SEE PAGE 60-53)
OK
USE SIMULATION METHOD TO CHECK

I40606H44540
SW1IG+
T15
H01015G27651 H43625H43469H44540
H44542
Telltale
Lamp
AssyAirbag
Sensor
Assy
Center CB
PAON P-ABA17
T15
PAON
Service Wire
DA
P-AB
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 WIRE HARNESS (SOURCE VOLTAGE)
(a) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage and resistance according to the val-
ue(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
T15-4 (IG+) -
Body groundIgnition switch ON10 to 14 V
T15-5 (SW1) -
Body groundAlwaysBelow 1 W
NG REPLACE TELLTALE LAMP ASSY OR WIRE
HARNESS (TELLTALE LAMP ASSY - BATTERY)
OR BATTERY
OK
7 CHECK WIRE HARNESS (OPEN)
(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) Using a service wire, connect T15-2 (P-AB) and T15-7
(PAON) of connector ºCº.
NOTICE:
Do not forcibly insert a service wire into the terminals of
connector when connecting.
(d) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A17-1 (P-AB) -
A17-25 (PAON)AlwaysBelow 1 W
NG REPAIR OR REPLACE WIRE HARNESS
OK