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)
05-1290
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1480 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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
1481 Author: Date:
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
05-1292
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1482 Author: Date:
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
2270 Author: Date:
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
2271 Author: Date:
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
05-2082
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2272 Author: Date:
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).
Page 991 of 2572

B51838
C11
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05-2083
2273 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(1) Disconnect the connectors of the meter assy, ECM and air conditioner amplifier.
(2) Inspect the continuity between terminal C12-9 (MPX+) of the meter assy vehicle's side connec-
tor and terminal E6-29 (MPX2) of the ECM vehicle's side connector.
Standard:
Symbols (Terminal No.)Specified Condition
MPX+ (C12-9) @ MPX2 (E6-29)
(equipped with 1MZ-FE)Continuity
MPX+ (C12-9) @ MPX2 (E6-29)
(equipped with 2AZ-FE)Continuity
(3) Inspect the continuity between terminal C11-21 (MPX-) of the meter assy vehicle's side connec-
tor and terminal A10-9 (MPX-) of the air conditioner amplifier vehicle's side connector.
Standard: Continuity
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
2 CHECK COMBINATION METER ASSY
(a) Inspect the combination meter assy (meter ECU) (power source input).
(1) Disconnect the meter assy connector C11.
(2) Inspect the voltage of each terminal of the vehicle's side connector.
Standard:
Symbols (Terminal No.)ConditionSpecified Condition
B (C11-2) @ Body groundConstant10 - 14 V
B1 (C11-12) @ Body groundConstant10 - 14 V
HINT:
If the value is not as specified, there may be a malfunction in the vehicle's side connector.
NG REPAIR OR REPLACE FUSE OR WIRE
HARNESS AND CONNECTOR
OK
Page 992 of 2572
B51839
C11
05-2084
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2274 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK COMBINATION METER ASSY
(a) Inspect the combination meter assy (meter ECU) (body ground).
(1) Disconnect the meter assy connector C11.
(2) Inspect the continuity between terminal C11-22 (E2) of the vehicle's side connector and the body
ground.
Standard: Continuity
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE COMBINATION METER ASSY