engine TOYOTA HIGHLANDER 2001 Service Repair Manual

E74077
Engine Room R/B No.3
Body ECU
Engine Room R/B
H4
Headlamp RH (Low Beam)
H3
Headlamp RH (High Beam)H2
Headlamp LH (Low Beam)
H1
Headlamp LH (High Beam)Engine Room R/B No.3
DRL No.4 Relay
Engine Room J/B
H-LP RH UPR H-LP LH UPR
HEAD LAMP RelayDRL No.3 Relay DRL No.2 Relay
HRLY
DRL
MAIN
FL MAIN Battery R-B R-B
R-B
L-W
L-W
L-Y
R-W
R-WW-BL-R
R-Y
R-W
W-B
W-B
W-B
R-W
W-B
J1
J/C J3
J/C
W
13WEB EA EG F7
FL BlockA A16
IK3B2
B11
1
2I1
2BP
1 2 2
3 1
4 5
2F
4
2G2
2F 1
2R32
15 3
3
3 3 1
212
R-L31
2 12 222
12 IK34
R
B113
H-LP RH LWR H-LP LH LWR B
B
B 3
3
3
3
31
3
2
1
53
3
3
3
3 2
5
1
2
3
4 DRL 05-1564
- DIAGNOSTICSLIGHTING SYSTEM
1754 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

E72985
Engine Room J/B
Connector Front View:
2G
2G-4
05-1568
- DIAGNOSTICSLIGHTING SYSTEM
1758 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 INSPECT ENGINE ROOM J/B
(a) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2G-4 - Body groundAlways10 to 14 V
NG Go to step 6
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM J/B - MULTIPLEX NETWORK
BODY ECU)

E72985
Engine Room J/B
Connector Front View:
2I
2I-1
- DIAGNOSTICSLIGHTING SYSTEM
05-1569
1759 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK HARNESS AND CONNECTOR(POWER SOURCE CIRCUIT)
(a) Disconnect the 2I connector from the engine room J/B.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2I-1 - Body groundAlways10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ENGINE ROOM J/B

E72985
Engine Room J/B
Connector Front View:
2B
2B-1
05-1570
- DIAGNOSTICSLIGHTING SYSTEM
1760 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7 INSPECT ENGINE ROOM J/B
(a) Disconnect the 2B connector from the engine room J/B.
(b) Using a service wire, connect 2B-1 of the engine room J/B side and body ground.
OK: Headlamp (high) comes on (decrease mode).
NG Go to step 8
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM J/B - MULTIPLEX NETWORK
BODY ECU)

E72985
Engine Room J/B
Connector Front View:
2F
2F-5
2F-2
- DIAGNOSTICSLIGHTING SYSTEM
05-1571
1761 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 INSPECT ENGINE ROOM J/B
(a) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2F-2 - Body groundConnect 2B-1 and body ground10 to 14 V
2F-5 - Body groundConnect 2B-1 and body ground10 to 14 V
NG Go to step 9
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF HEADLAMP CIRCUIT)

E72985
Engine Room J/B
Connector Front View:
2B
2B-1
05-1572
- DIAGNOSTICSLIGHTING SYSTEM
1762 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
9 INSPECT ENGINE ROOM J/B
(a) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2B-1 - Body groundAlways10 to 14 V
NG Go to step 10
OK
REPLACE ENGINE ROOM J/B

E72985
Engine Room J/B
Connector Front View:
2I
2I-1
- DIAGNOSTICSLIGHTING SYSTEM
05-1573
1763 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 CHECK HARNESS AND CONNECTOR(POWER SOURCE CIRCUIT)
(a) Disconnect the 2I connector from the engine room J/B.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2I-1 - Body groundAlways10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ENGINE ROOM J/B

E74084
GeneratorECM
W-G21
E9RL
4
G1 L 05-1596
- DIAGNOSTICSLIGHTING SYSTEM
1786 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
GENERATOR SIGNAL CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU receives an engine condition signal via a generator.
WIRING DIAGRAM
05CS6-03

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)

05ISA-02
I40190
I38204
I38205
05-1784
- DIAGNOSTICSNAVIGATION SYSTEM
1974 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DIAGNOSTIC START-UP/FINISH
HINT:

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.

After the ignition switch is turned on, check that the map is displayed before starting the diagnostic
mode. Otherwise, some items cannot be checked.
1. There are 2 methods to start diagnostic mode. Start the mode by using one of them.
2. Method 1
(a) Start the engine.
(b) While pressing and holding ºINFOº switch, operate light
control switch, OFF " TAIL " OFF " TAIL " OFF "
TAIL " OFF.
(c) The diagnostic mode starts and the service check screen
(ºSystem Check Modeº) will be displayed. Service inspec-
tion starts automatically and the result will be displayed.
3. Method 2
(a) Start the engine.
(b) Switch to the ºDisplay Checkº screen.
(c) From the display adjustment screen, touch the corners of
the screen in the following order: upper left " lower left
"upper left " lower left " upper left " lower left.
(d) The diagnostic mode starts and ºService Checkº screen
will be displayed. Service inspection starts automatically
and the result will be displayed.
4. Diagnosis MENU
(a) Diagnostic screen will be displayed by pressing the menu
switch on the service check screen.