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 961 of 2572
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- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2246 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1214 DOOR SYSTEM COMMUNICATION BUS
MALFUNCTION (+B SHORT)
DTC B1215 DOOR SYSTEM COMMUNICATION BUS
MALFUNCTION (GND SHORT)
CIRCUIT DESCRIPTION
B1214 and B1215 will be output when +B and body ground is short-circuited on the communication bus.
Detecting this condition will make all the BEAN communication unable and output some DTCs.
DTC No.DTC Detecting ConditionTrouble Area
B1214Communication circuit and +B battery system short
Power window regulator master switch assy (door ECU)
ECM
Air conditioner amplifier assy (A/C ECU)
Combination meter assy (meter ECU)
Theft warning ECU assy (theft deterrent ECU)
Sliding roof drive gear sub-assy (sliding roof ECU)
Wire harness
Multiplex network body ECU
B1215Communication circuit and body ground short
Power window regulator master switch assy (door ECU)
ECM
Air conditioner amplifier assy (A/C ECU)
Combination meter assy (meter ECU)
Theft warning ECU assy (theft deterrent)
Sliding roof drive gear sub-assy (sliding roof ECU)
Wire harness
Multiplex network body ECU
0523Y-04
Page 962 of 2572
B78727
ECM
Passenger
Side J/BMultiplex Network Body ECU
P5
Power Window
Regulator Master
Switch Assy
(Door ECU)
Combination
Meter Assy
Air Conditioner
Amplifier Assy MPX2
B9 10
6
O
IF3
IB25
1MPX1 Y
V8
MPX1MPX2
MPX2
7IB28
54F
4A SB
RS31
Short
Connector
A113E
G
MPX+MPX-5
12 2MPX1
1
T4
Theft Warning ECU Assy
(Theft deterrent ECU) IL2
G
A1018
29
GR
3J 3H 1Y C11 C12
21 9
MPX+
MPX- SBIL2 1 GRGR
IE16
Y
10
MPX1
MPX131 VCenter J/BS20
Sub Assy
(Sliding Roof ECU) B10
W
E6
9 2 12 BR7 GR
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05-2057
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM
Page 963 of 2572
B61052
Multiplex Network Body ECU
Communication Circuit
Communication Circuit
Communication Circuit Communication Circuit
A ECU B ECU C ECU
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- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2248 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK DIAGNOSTIC TROUBLE CODE (A ECU)
(a) Check whether the output of the DTC will stop when the A ECU connector is disconnected.
NOTICE:
Disconnect the connectors in the operational sequence, and start the next operation after the con-
nector is connected.
HINT:
In this case, the A ECU represents the power window regulator master switch assy (door ECU).
Standard: The disconnected A ECU is abnormal when the output of the DTC stops.
OK REPLACE A ECU
NG
Page 964 of 2572
B61053
Multiplex Network Body ECU
Communication Circuit
Communication CircuitCommunication Circuit
Communication Circuit
A ECU B ECU C ECU
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05-2059
2249 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK DIAGNOSTIC TROUBLE CODE (B ECU)
(a) Check whether the output of the DTC will stop when the B ECU connector is disconnected.
NOTICE:
Disconnect the connectors in the operational sequence, and start the next operation after the con-
nector is connected.
HINT:
In this case, the B ECU represents the sliding roof drive gear sub-assy (sliding roof ECU), combination meter
assy (meter ECU), air conditioner amplifier assy (A/C ECU) or theft warning ECU assy (theft deterrent).
Standard: The disconnected B ECU or the wire harness between the A ECU and B ECU is abnor-
mal when the output of the DTC stops.
NG Go to step 4
OK
Page 965 of 2572
B61054
Multiplex Network Body ECU
Communication Circuit
Communication Circuit
Communication CircuitCommunication Circuit
A ECU B ECU C ECU
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK WIRE HARNESS BETWEEN A ECU AND B ECU
(a) Inspect short-circuit in +B or body ground.
(1) Check whether the DTC will be output when the A ECU connector is connected.
NOTICE:
Disconnect the connectors in the operational sequence, and start the next operation after the con-
nector is connected.
OK REPLACE B ECU
NG REPAIR OR REPLACE WIRE HARNESS
BETWEEN A ECU AND B ECU
Page 966 of 2572
B60307
Multiplex Network Body ECU
Communication Circuit
Communication Circuit
Communication CircuitCommunication Circuit
A ECU B ECU C ECU
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
05-2061
2251 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK DIAGNOSTIC TROUBLE CODE (C ECU)
(a) Check whether the output of the DTC will stop when the A ECU connector is connected and the C ECU
connector is disconnected.
NOTICE:
Disconnect the connectors in the operational sequence, and start the next operation when the con-
nector is connected.
HINT:
In this case, the C ECU represents the ECM.
Standard: The disconnected C ECU or the wire harness between the B ECU and C ECU is abnor-
mal when the output of the DTC stops.
NG Go to step 6
OK
Page 967 of 2572
B60306
Multiplex Network Body ECU
Communication Circuit
Communication Circuit
Communication CircuitCommunication Circuit
A ECU B ECU C ECU
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 CHECK WIRE HARNESS BETWEEN B ECU AND C ECU
(a) Inspect short-circuit in +B or body ground.
(1) Check whether the DTC will be output when the B ECU connector is connected.
NOTICE:
Disconnect the connectors in the operational sequence, and start the next operation after the con-
nector is connected.
OK REPLACE C ECU
NG REPAIR OR REPLACE WIRE HARNESS
BETWEEN B ECU AND C ECU
Page 968 of 2572
B60308
Multiplex Network Body ECU
Communication Circuit
Communication Circuit
Communication Circuit Communication Circuit
A ECU B ECU C ECU
- DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK WIRE HARNESS MPX BODY ECU AND A ECU OR C ECU
(a) Inspect short-circuit in +B or body ground.
(1) Disconnect the connectors of the A ECU and multiplex network body ECU.
(2) Inspect short-circuit in +B of the wire harness between the A ECU and multiplex network body
ECU, and also in the body ground.
Standard:
0 V when short-circuited in +B.
No continuity between each ECU terminal and the body ground when short-circuited in the
body ground.
HINT:
In this case, the A ECU represents the power window regulator master switch assy (door ECU).
(3) Inspect short-circuit in +B of the wire harness between the C ECU and multiplex network body
ECU, and also in the body ground.
Standard:
0 V when short-circuited in +B.
No continuity between each ECU terminal and the body ground when short-circuited in the
body ground.
HINT:
In this case, the C ECU represents the ECM.
NG REPAIR OR REPLACE WIRE HARNESS
BETWEEN MPX BODY ECU AND A ECU OR C
ECU
OK
REPLACE MULTIPLEX NETWORK BODY ECU
Page 969 of 2572
E74075
Body ECU
C13
Combination Switch
Light
Control
SwitchTAIL
HEAD
OFF
Tail
HeadV
LG18
B10
17
B10
14 13
THEL
IA16
W-B 05-1548
- DIAGNOSTICSLIGHTING SYSTEM
1738 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC B1241 BODY ECU SWITCH CIRCUIT DIAGNOSIS
CIRCUIT DESCRIPTION
The following explains when this DTC is output:
This DTC is not output when the switches are operated but fail to make contact. It is only output when the
switches are stuck or held on. For example, this code is output when checking the DTC while the switches
are on:
System is normal:
(a) DTC is output during DTC check with the switches on.
(b) DTC is not output during DTC check with the switches off.
Inspect the switches and replace if necessary. If there is no problem with the switches, inspect the wire har-
ness.
DTC No.DTC Detecting ConditionTrouble Area
B1241Switch is stuck
Headlamp dimmer switch assy
Wire harness or connector
Multiplex network body ECU
WIRING DIAGRAM
05IQ7-01
Page 970 of 2572
E11948
Connector Front View:
C13
- DIAGNOSTICSLIGHTING SYSTEM
05-1549
1739 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 READ VALUE OF HAND-HELD TESTER
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the hand-held tester main switch on.
(c) Select the item below in the DATA LIST and read the display on hand-held tester.
BODY NO.1 (MULTIPLEX NETWORK BODY ECU):
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
HEAD LIGHT SWHeadlight control
SW signal/ ON or OFFON: Light control switch is in HEAD position
OFF: Light control switch is in except HEAD position-
TAIL LIGHT SWTail light SW signal/
ON or OFFON: Light control switch is in TAIL position
OFF: Light control switch is in except TAIL position-
OK: Condition sign can be displayed.
NG Go to step 2
OK
REPLACE MULTIPLEX NETWORK BODY ECU
2 INSPECT HEADLAMP DIMMER SWITCH ASSY
(a) Inspect light control switch.
(1) Measure the resistance according to the value(s) in
the table below.
Standard:
Tester connectionConditionSpecified condition
14 - 16TAILBelow 1 W
13 - 16
14 - 16HEADBelow 1 W
NG REPLACE HEADLAMP DIMMER SWITCH ASSY
(SEE PAGE 65-25)
OK