TOYOTA HIGHLANDER 2001 Service Repair Manual

E74382
ECM
Connector Front View:
E9
E9-21
- DIAGNOSTICSLIGHTING SYSTEM
05-1597
1787 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK ECM
(a) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
E9-21 - Body groundEngine running10 to 14 V
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)
2 INSPECT GENERATOR ASSY
(a) Inspect generator assy (see page 19-17 or 19-42).
NG CHECK AND REPLACE GENERATOR ASSY
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (GENERATOR ASSY - ECM)

E74085
Passenger Side J/B
Body ECU
P3
Parking Brake SW9
4M B
13
4HR14
B12PKB 05-1598
- DIAGNOSTICSLIGHTING SYSTEM
1788 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
PARKING BRAKE SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU receives the parking brake switch signal.
WIRING DIAGRAM
05ETU-02

E74263
Multiplex Network Body ECU
Connector Front View:
B12
B12-14
- DIAGNOSTICSLIGHTING SYSTEM
05-1599
1789 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR(PARKING BRAKE SWITCH CIRCUIT)
(a) Disconnect the B12 connector from the multiplex network body ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
B12-14 - Body groundShaft of parking brake switch is pressed10 kW or higher
B12-14 - Body groundShaft of parking brake switch is not pressedBelow 1 W
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

E71372
ON
OFF
05-1600
- DIAGNOSTICSLIGHTING SYSTEM
1790 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 INSPECT PARKING BRAKE SWITCH ASSY
(a) Remove the parking brake switch.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
1 - Switch bodyOFF
(When shaft is pressed)10 kW or higher
1 - Switch body
ON
(When shaft is not
pressed)
Below 1 W
NG REPLACE PARKING BRAKE SWITCH ASSY
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (PARKING BRAKE SWITCH CIRCUIT)

05-1574
- DIAGNOSTICSLIGHTING SYSTEM
1764 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TAIL RELAY CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU controls the TAIL relay when a signal is received from the headlamp dim-
mer switch assy.
05IQA-01

E74078
Instrument Panel J/B
TAILLIGHT RelayBody ECU
F3
Front Parking Lamp LH
F4
Front Parking Lamp RH
R8 Taillamp RH
(Rear Combination Lamp RH)
R7 Taillamp LH
(Rear Combination Lamp LH)
R15
Rear Side Marker Lamp RH
R14
Rear Side Marker Lamp LH
L1
License Plate Lamp
F7
FL Block
FL MAIN BatteryTAILTRLY
ALT7
B9 4
1J
4
1B
11
1B 1
1A
4
1HSB
IA1
BG2
BE BCEA
EG J14
J/CJ3
J/CJ1
J/C G
G 12
3
5 B
W
46B E
46
B E
12
21 E E
W2 8
E
EB
B
A A A
1 2 2 1W-B
W-B
W-B
BR
W-B
BR
BR
W-B
W-B BR
W-B BR
BR
W-B J13
J/CJ12
J/C 12
12
W
- DIAGNOSTICSLIGHTING SYSTEM
05-1575
1765 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

05-1576
- DIAGNOSTICSLIGHTING SYSTEM
1766 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 PERFORM ACTIVE TEST USING 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 ACTIVE TEST and then check the relay operation.
BODY NO.1 (MULTIPLEX NETWORK BODY ECU):
ItemTest DetailsDiagnostic Note
TAIL LIGHTTaillamp relay ON/OFF-
OK: Taillamp comes on.
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

E74263
B9
B9-7 Multiplex Network Body ECU
Connector Front View:
- DIAGNOSTICSLIGHTING SYSTEM
05-1577
1767 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 INSPECT MULTIPLEX NETWORK BODY ECU
(a) Disconnect the B9 connector from the multiplex network body ECU.
(b) Using a service wire, connect B9-7 of the wire harness side and body ground.
OK: Taillamp comes on.
NG Go to step 3
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

E72975
Instrument Panel Junction Block
Front Side View:
1J
1J-4
05-1578
- DIAGNOSTICSLIGHTING SYSTEM
1768 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY
(a) Disconnect the 1J connector from the instrument panel
junction block assy.
(b) Using a service wire, connect 1J-4 of the instrument pan-
el junction block side and body ground.
OK: Taillamp comes on.
NG Go to step 4
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK
ASSY - MULTIPLEX NETWORK BODY ECU)

E72976
Instrument Panel Junction Block
Back Side View:
1B 1H
1H-4 1B-4
1B-1 1
- DIAGNOSTICSLIGHTING SYSTEM
05-1579
1769 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY
(a) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
1B-4 - Body groundConnect 1J-4 and
body ground10 to 14 V
1B-1 1 - Body groundConnect 1J-4 and
body ground10 to 14 V
1H-4 - Body groundConnect 1J-4 and
body ground10 to 14 V
NG Go to step 5
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF TAILLAMP CIRCUIT)