TOYOTA HIGHLANDER 2001 Service Repair Manual
Manufacturer: TOYOTA, Model Year: 2001, Model line: HIGHLANDER, Model: TOYOTA HIGHLANDER 2001Pages: 2572, PDF Size: 34.8 MB
Page 981 of 2572
A53766
E7
E8E9E6
E5
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05-2069
2259 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK ECM
(a) Inspect the ECM (body ground).
NOTICE:
Do not disconnect the ECM connector. The inspection should be started from the backside of the
connector.
(1) Inspect the continuity between each terminal of the ECM connector and the body ground.
Standard:
Symbols (Terminal No.)In/OutputConditionSpecified Condition
E1 (E9-1 (*1), E7-1 (*2)) @
Body groundInputConstantContinuity
(*1) : 2AZ-FE
(*2) : 3MZ-FE
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE ECM
Page 982 of 2572
H43056H44106
B19
Buckle SW (Driver's Side)Airbag Sensor
Assy Center
LBE+ A16 G
111
3R
LBE- A166 19
2 A16
A16(*2)
(*2) (*1)
(*1)
*1: w/ Curtain Shield Airbag
*2: w/o Curtain Shield Airbag
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B0126/27 SEAT BELT BUCKLE SWITCH (LH)
MALFUNCTION
CIRCUIT DESCRIPTION
The seat belt buckle switch LH circuit consists of the airbag sensor assy center and the front seat inner belt
assy LH (seat belt buckle switch LH).
DTC B0126/27 is recorded when a malfunction is detected in the seat belt buckle switch LH circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0126/27
Short circuit in front seat inner belt assy LH wire harness
(to B+)
Short circuit in front seat inner belt assy LH wire harness
(to ground)
Open circuit in LBE+ wire harness or LBE- wire harness
of front seat inner belt assy LH
Front seat inner belt assy LH malfunction
Airbag sensor assy center malfunction
Front seat inner belt assy LH (Seat belt buckle switch LH)
Airbag sensor assy center
Floor wire No.2
WIRING DIAGRAM
05IVB-01
Page 983 of 2572
C85269H10600C85273H41027
Airbag
Sensor
Assy
Center Front Seat Inner
Belt Assy LH
DTC B0126/27 DLC3
CG
TC
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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 B0126/27 is not output.
HINT:
Codes other than code B0126/27 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 connectors are properly connected to the airbag sensor assy center and the front seat
inner belt assy LH.
OK:
The connectors are connected.
NG CONNECT CONNECTORS, THEN GO TO STEP
1
OK
Page 984 of 2572
H43342
H42459H44468
LBE+Airbag
Sensor
Assy
Center A
B C DFloor Wire No.2
1LBE-
3
Front Seat Inner
Belt Assy LH
B19
Service Wire
A16
A16
(*2)(*1)
LBE-
LBE+
H42459
Airbag
Sensor
Assy
Center Floor Wire No.2
Front Seat Inner
Belt Assy LH
LBE+LBE-
LBE+LBE-A16
A16
(*2)(*1)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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3 CHECK FLOOR WIRE NO.2(OPEN)
(a) Disconnect the connectors from the airbag sensor assy
center and the front seat inner belt assy LH.
(b) Using a service wire, connect B19-1 and B19-3 of con-
nector ºCº.
NOTICE:
Do not forcibly insert a service wire into the terminal of the
connector when connecting.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
w/ Curtain shield airbag (*1):
Tester connectionConditionSpecified condition
A16-19 (LBE+) -
A16-2 (LBE-)AlwaysBelow 1 W
w/o Curtain shield airbag (*2):
Tester connectionConditionSpecified condition
A16-1 1 (LBE+) -
A16-6 (LBE-)AlwaysBelow 1 W
NG REPAIR OR REPLACE FLOOR WIRE NO.2
OK
4 CHECK FLOOR WIRE NO.2(TO B+)
(a) Disconnect the service wire from connector ºCº.
(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:
w/ Curtain shield airbag (*1):
Tester connectionConditionSpecified condition
A16-19 (LBE+) -
Body groundIgnition switch ONBelow 1 V
A16-2 (LBE-) -
Body groundIgnition switch ONBelow 1 V
w/o Curtain shield airbag (*2):
Tester connectionConditionSpecified condition
A16-1 1 (LBE+) -
Body groundIgnition switch ONBelow 1 V
A16-6 (LBE-) -
Body groundIgnition switch ONBelow 1 V
NG REPAIR OR REPLACE FLOOR WIRE NO.2
OK
Page 985 of 2572
H42459
Airbag
Sensor
Assy
Center Floor Wire No.2
Front Seat Inner
Belt Assy LH
LBE+LBE-
LBE+LBE-A16
A16
(*2)(*1)
H42459
Airbag
Sensor
Assy
Center Floor Wire No.2
Front Seat Inner
Belt Assy LH
LBE+LBE-
LBE+LBE-A16
A16
(*2)(*1)
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5 CHECK FLOOR WIRE NO.2(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/ Curtain shield airbag (*1):
Tester connectionConditionSpecified condition
A16-19 (LBE+) -
Body groundAlways1 MW or Higher
A16-2 (LBE-) -
Body groundAlways1 MW or Higher
w/o Curtain shield airbag (*2):
Tester connectionConditionSpecified condition
A16-1 1 (LBE+) -
Body groundAlways1 MW or Higher
A16-6 (LBE-) -
Body groundAlways1 MW or Higher
NG REPAIR OR REPLACE FLOOR WIRE NO.2
OK
6 CHECK FLOOR WIRE NO.2(SHORT)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
w/ Curtain shield airbag (*1):
Tester connectionConditionSpecified condition
A16-19 (LBE+) -
A16-2 (LBE-)Always1 MW or Higher
w/o Curtain shield airbag (*2):
Tester connectionConditionSpecified condition
A16-1 1 (LBE+) -
A16-6 (LBE-)Always1 MW or Higher
NG REPAIR OR REPLACE FLOOR WIRE NO.2
OK
Page 986 of 2572
C85269H10600C85273H41027
Airbag
Sensor
Assy
Center Front Seat Inner
Belt Assy LH
DTC B0126/27
DLC3
CG
TC
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1291
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7 CHECK FRONT SEAT INNER BELT ASSY LH
(a) Connect the connectors to the front seat inner belt assy
LH and the airbag sensor assy center.
(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, and wait for at
least 60 seconds.
(d) Clear the DTCs stored in memory (see page 05-1215).
(e) Turn the ignition switch to the LOCK position.
(f) Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
(g) Check the DTCs (see page 05-1215).
OK:
DTC B0126/27 is not output.
HINT:
Codes other than code B0126/27 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
Page 987 of 2572
C85269H10600C85273H41027
Airbag
Sensor
Assy
Center Front Seat Inner
Belt Assy LH
DTC B0126/27
DLC3
CG
TC
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- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 REPLACE FRONT SEAT INNER BELT ASSY LH
(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 front seat inner belt assy LH (see page 72-1 1, 72-19).
9 CHECK AIR BAG SENSOR ASSY CENTER
(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, 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 B0126/27 is not output.
HINT:
Codes other than code B0126/27 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
END
Page 988 of 2572
05-2080
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1271 COMBINATION METER ECU
COMMUNICATION STOP
CIRCUIT DESCRIPTION
B1271 will be output when the communication between the combination meter assy (meter ECU) and multi-
plex network body ECU stops for more than 10 seconds.
DTC No.DTC Detecting ConditionTrouble Area
B1271No communication from meter ECU for more than 10 secondsCombination meter assy (meter ECU)
Wire harness
05242-04
Page 989 of 2572
B78731
Combination Meter
Assy (Meter ECU)ECM
Instrument
Panel J/B
Air Conditioner
Amplifer Assy
(A/C ECU) Center J/B
Center
J/B MPX2
B
22 E6
IL2
C12
E2 GR
9
MPX+
MPX-
MPX-C11
W-B
W-B3E
3F
1310 C11
122
L-G 11K1G 10BRIC3 W-L2A 2AFL Main D.C.C.
Battery 1
DOME
V
3
3D
93F
L-G
IL211
V
114D
64H
IK3 12 R
A10 9C11 21SB29
1
V 343
ECU-B Engine Room J/B
2IFL Block Assy
W
5
3J 3E
121Y
IB C11B1 1
Center
J/B
G WF7
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05-2081
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM
Page 990 of 2572
H45689
C12 C11E5
Combination Meter Assy (Meter ECU)
Air Conditioner Amplifier Assy (A/C ECU) ECM
E6
A10
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- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK CONTINUITY OF COMMUNICATION LINE
(a) Inspect the wire harness between the ECM, combination meter assy (meter ECU) and air conditioner
amplifier assy (A/C ECU).