TOYOTA HIGHLANDER 2001 Service Repair Manual

- 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

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

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

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)

E68822E70389
4
3
1 A23
Automatic Light Control Sensor
21
20
12 B9
B9
B9CLTS
CLTE
CLTB R
W
GBody ECU
CLTS
CLTE
CLTB
- DIAGNOSTICSLIGHTING SYSTEM
05-1589
1779 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
AUTOMATIC LIGHT CONTROL SENSOR CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU receives a signal from the automatic light control sensor.
HINT:
A DTC code is output when the automatic light control sensor is malfunctioning or there is an open or short
circuit in the automatic light control sensor (see page 05-1551).
WIRING DIAGRAM
05IQD-01

I39976
Wire Harness View:
Automatic Light Control Sensor
A23
1
3
I39976
Wire Harness View:
Automatic Light Control Sensor
A23
4
E74263
Multiplex Network Body ECU
Connector Front View:
B9
B9-21
05-1590
- DIAGNOSTICSLIGHTING SYSTEM
1780 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR(AUTOMATIC LIGHT CONTROL SENSOR
POWER SOURCE CIRCUIT)
(a) Disconnect the automatic light control sensor connector.
(b) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
A23-1 - A23-3Ignition switch ON10 to 14 V
NG Go to step 4
OK
2 CHECK HARNESS AND CONNECTOR(MULTIPLEX NETWORK BODY ECU -
AUTOMATIC LIGHT CONTROL SENSOR)
(a) Disconnect the B9 connector from the multiplex network
body ECU.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A23-4 - B9-21AlwaysBelow 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

I39976
Wire Harness View:
Automatic Light Control Sensor
A23
1
- DIAGNOSTICSLIGHTING SYSTEM
05-1591
1781 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 REPLACE AUTOMATIC LIGHT CONTROL SENSOR
OK: Return to normal condition.
NG PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)
OK
END
4 CHECK HARNESS AND CONNECTOR(MULTIPLEX NETWORK BODY ECU -
AUTOMATIC LIGHT CONTROL SENSOR)
(a) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
A23-1 - Body groundIgnition switch ON10 to 14 V
NG Go to step 6
OK

I39976
Wire Harness View:
Automatic Light Control Sensor
A23
3
E74263
Multiplex Network Body ECU
Connector Front View:
B9
B9-20
05-1592
- DIAGNOSTICSLIGHTING SYSTEM
1782 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 CHECK HARNESS AND CONNECTOR(MULTIPLEX NETWORK BODY ECU -
AUTOMATIC LIGHT CONTROL SENSOR)
(a) Disconnect the B9 connector from the multiplex network
body ECU.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A23-3 - B9-20AlwaysBelow 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

I39976
Wire Harness View:
Automatic Light Control Sensor
A23
1
E74263
Multiplex Network Body ECU
Connector Front View:
B9
B9-12
- DIAGNOSTICSLIGHTING SYSTEM
05-1593
1783 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK HARNESS AND CONNECTOR(MULTIPLEX NETWORK BODY ECU -
AUTOMATIC LIGHT CONTROL SENSOR)
(a) Disconnect the B9 connector from the multiplex network
body ECU.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A23-1 - B9-12AlwaysBelow 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

05F3E-05
05-902- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1092 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MONITOR DRIVE PATTERN
1. MONITOR DRIVE PATTERN FOR ECT TEST
(a) Perform this drive pattern as one method to simulate the detection conditions of the ECT malfunctions.
(The DTCs may not be detected due the actual driving conditions. And some codes may not be de-
tected through this drive pattern).
HINT:
Preparation for driving

Warm up the engine sufficiently. (Engine coolant temperature is 60 °C (140 °F) or higher)

Drive the vehicle when the atmospheric temperature is -10 °C (14 °F) or higher. (Malfunction is not
detected when the atmospheric temperature is -10 °C (14 °F) or less)
Driving note

Drive the vehicle through all gears.
Stop " 1st " 2nd " 3rd " O/D " O/D (lock-up ON).

Repeat the above driving pattern three times or more.
NOTICE:

The monitor status can be checked using the OBD II scan tool. When using the hand-held tes-
ter, monitor status can be found in the ºENHANCED OBD II/DATA LISTº or under ºCARB OBD
IIº.

In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other
factors) the drive pattern can be resumed and, in most cases, the monitor can be completed.
CAUTION:
Perform this drive pattern on a level road as much as possible and strictly observe the posted speed
limits and traffic laws while driving.