Page 1537 of 2572
E74079
Instrument Panel J/B
Body ECU
TAILLIGHT Relay
FOG LIGHT Relay
F2
Front Fog Lamp RH
F1
Front Fog Lamp LH
F7
FL BlockTRLY
FFGO TAIL
FR FOG
W-B
R-W R-W R-W
FL MAIN
BatteryALT4
12
53 1
1A BSB
V7
B9
6
B9
W
2
1
EG EA 12
122
1J
7
1B
W-B1J
A
A
J1
J/CJ3
J/C 12
35 05-1582
- DIAGNOSTICSLIGHTING SYSTEM
1772 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
FRONT FOG LIGHT CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU controls the FOG relay when a signal is received from the headlamp dim-
mer switch assy.
WIRING DIAGRAM
05IQB-01
Page 1538 of 2572
E74263
Multiplex Network Body ECU
Connector Front View:
B9
B9-7
B9-6
- DIAGNOSTICSLIGHTING SYSTEM
05-1583
1773 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Inspect if the taillamp system is normal before performing this procedure.
1 INSPECT MULTIPLEX NETWORK BODY ECU
(a) Disconnect the B9 connector from the multiplex network body ECU.
(b) Using a service wire, connect B9-6 and B9-7 of the wire harness side and body ground.
OK: Front fog lamp comes on.
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)
Page 1539 of 2572
E72975
Instrument Panel Junction Block
Front Side View:
1J
1J-4 1J-2
05-1584
- DIAGNOSTICSLIGHTING SYSTEM
1774 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY
(a) Disconnect the 1J connector from the instrument panel
junction block.
(b) Using a service wire, connect 1J-2, 1J-4 of the instru-
ment panel junction block side and body ground.
OK: Front fog lamp comes on.
NG Go to step 3
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK
ASSY - MULTIPLEX NETWORK BODY ECU)
Page 1540 of 2572
E72977
Instrument Panel Junction Block
Back Side View:
1B
1B-7
- DIAGNOSTICSLIGHTING SYSTEM
05-1585
1775 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY
(a) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
1B-7 - Body groundConnect 1J-2, 1J-4
and body ground10 to 14 V
NG REPLACE INSTRUMENT PANEL JUNCTION
BLOCK ASSY
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF FOG LAMP CIRCUIT)
Page 1541 of 2572
- DIAGNOSTICSAUDIO SYSTEM
05-1647
1837 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ILLUMINATION CIRCUIT
CIRCUIT DESCRIPTION
When the light control switch is in the TAIL or HEAD position, the TAILLIGHT relay activates and supplies
power to illuminate the radio receiver assy panel.
05IRN-01
Page 1542 of 2572
I40214
Radio Receiver Assy
Center J/B C11
Combination Meter Assy
Taillight System
F7
Fusible Link BlockILL-
ILL+ ILL
3F5
3F9
3F13 3G2
3D3
3E 10
3A 12
3I8
1 6
37
11
1222B
G
ORV
W
1A
1J 1K2A2I 4D 4HPassenger Side J/B
Engine Room J/B
Instrument Panel J/B
BW5
10 12
11
7
3
5
2
11LGR2
R3
IL2
IK3W-B
W-B
2
3 1
WALTDOME
D.C.C
TAILLIGHT Relay PANEL
FL MAIN
Battery
IB V
4VR4
R412
2 (*1) (*2)
(*1)(*2)
*1:JBL Type
*2:Standard Type 05-1648
- DIAGNOSTICSAUDIO SYSTEM
1838 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM
Page 1543 of 2572
I39174
R3
ILL+
Standard Type:
I39175
JBL Type:
R4
ILL+
- DIAGNOSTICSAUDIO SYSTEM
05-1649
1839 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK SYSTEM
(a) Turn the light control switch to the TAIL or HEAD position.
Check if other displays or indicators such as the A/C indicator come on.
OK: Other displays or indicators come on.
NG GO TO COMBINATION METER SYSTEM
(SEE PAGE 05-1868)
OK
2 INSPECT RADIO RECEIVER ASSY(ILL+)
(a) Disconnect the connector from the radio receiver assy.
(b) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
ILL+ - Body groundLight SW TAIL or HEAD10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
Page 1544 of 2572
I40182
C11
ILL
Combination Meter Assy:
I40213
R2
ILL-
Radio Receiver Assy
Standard Type:
I39175
Radio Receiver Assy:
R4
ILL-
JBL Type:
05-1650
- DIAGNOSTICSAUDIO SYSTEM
1840 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK HARNESS AND CONNECTOR(COMBINATION METER ASSY - RADIO
RECEIVER ASSY)
(a) Disconnect the connectors from the combination meter
assy and radio receiver assy.
(b) Measure the resistance according to the values in the
table below.
Standard:
Tester connectionSpecified condition
ILL - ILL-Below 1 W
ILL - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1632)