TOYOTA HIGHLANDER 2001 Service Repair Manual

05-1 178
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1368 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 PERFORM ACTUATOR CHECK
(a) Remove the glove box to see and check the recirculation damper servo sub-assy operation.
(b) Set to the actuator check mode (see page 05-1 117).
(c) Press the DEF switch and change it to step operation.
(d) Press the DEF switch in order and check the operation of recirculation damper servo sub-assy.
Display codeRecirculation damper position
0FRESH
1FRESH
2FRESH
3FRESH
4RECIRCULATION
5RECIRCULATION
6RECIRCULATION
7RECIRCULATION
8RECIRCULATION
9RECIRCULATION
OK:
Recirculation damper position changes in accor-
dance with each display code.
Result:
NGA
OK
(Checking from the PROBLEM SYMPTOMS TABLE)B
OK (Checking from the DTC)C
B PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE (SEE
PAGE 05-1 129)
C REPLACE AIRCONDITIONER AMPLIFIER ASSY
A

I30157
A13 Recirculation Damper Servo Sub-assy
Connector Wire Harness View:
I30336
To ºFRESHº
To ºRECIRCULATIONº
- DIAGNOSTICSAIR CONDITIONING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 INSPECT RECIRCULATION DAMPER SERVO SUB-ASSY(AIR INLET CONTROL
SERVO MOTOR)
(a) Remove the recirculation damper servo sub-assy.
(b) Connect the positive (+) lead to from the battery to termi-
nal 5 and negative (-) lead to terminal 2, then check that
the lever turns to ºFRESHº side smoothly.
(c) Connect the positive (+) lead to from the battery to termi-
nal 1 and negative (-) lead to terminal 5, then check that
the lever turns to ºRECIRCULATIONº side smoothly.
NG REPLACE RECIRCULATION DAMPER SERVO
SUB-ASSY(AIR INLET CONTROL SERVO
MOTOR)
OK

I41014
A13
A/C Amplifier Connector
Wire Harness View:
A10
Recirculation Damper Servo Sub-
assy Wire Harness View:
MR/F
AIR AIF
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- DIAGNOSTICSAIR CONDITIONING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK HARNESS AND CONNECTOR(RECIRCULATON DAMPER SERVO
SUB-ASSY (AIR INLET CONTROL SERVO MOTOR) - A/C AMPLIFIER ASSY)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A10-4 (MR/F) - A13-5AlwaysBelow 1 W
A10-6 (AIF) - A13-2AlwaysBelow 1 W
A10-5 (AIR) - A13-1AlwaysBelow 1 W
A10-4 (MR/F) -
Body groundAlways10 kW or higher
A10-6 (AIF) -
Body groundAlways10 kW or higher
A10-5 (AIR) -
Body groundAlways10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE AIRCONDITIONER AMPLIFIER ASSY

I40781
A/C Amplifier Assy
ACC A10 RADIO NO. 2
AM14GR13
Battery FL MAINInstrument Panel J/B Center J/B
3A V
2ACC 3 L
W2
63
1
1A 1C 1C1K
AM1
1
2
B
2 1
ALT
WF7
Fusible Link Block3I 13 11 I15
Ignition SW
- DIAGNOSTICSAIR CONDITIONING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ACC POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
This circuit supplies power to the A/C amplifier assy. It supplies power to the illumination for the clock.
WIRING DIAGRAM
05IU4-01

I30331ACC
A/C Amplifier Connector
Wire Harness View:
A10
I38763
A10
GND
ACC
A/C Amplifier Connector Wire Harness View:
05-1 176
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1366 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK FUSE(RADIO NO. 2, AM1 FUSES)
(a) Remove the RADIO No. 2 and AM1 fuses from the instrument panel J/B.
(b) Check that the continuity exits in RADIO No. 2 and AM1 fuses.
NG REPLACE FUSE
OK
2 INSPECT AIRCONDITIONER AMPLIFIER ASSY(ACC)
(a) Remove the A/C amplifier assy with connectors still con-
nected.
(b) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
A10-13 (ACC) -
Body groundIgnition switch ACC10 to 14 V
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE (SEE
PAGE 05-1 129)
NG
3 CHECK HARNESS AND CONNECTOR(A/C AMPLIFIER ASSY - BATTERY)
(a) Remove the A/C amplifier assy and disconnect the con-
nector.
(b) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
A10-13 (ACC) -
A10-1 1 (GND)Always10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE AIRCONDITIONER AMPLIFIER ASSY

05-1606
- DIAGNOSTICSLIGHTING SYSTEM
1796 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ILLUMINATION CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU controls the following.
(1) Key cylinder lamp
(2) Interior lamp
(3) Personal lamp (overhead J/B)
(4) Door courtesy lamp
05IQG-02

E74086
D6
Door Courtesy Lamp Front RHBody ECU
D5
Door Courtesy Lamp Front LH
I14
Ignition Key Cylinder Illumination
T7 Ignition Key Cylinder Illumination
(Transponder Key Amplifier)Passenger Side J/B
I16
Interior Lamp
O5
Overhead J/B
Engine Room J/B
Instrument Panel J/B
F7
FL Block
*1: w/ Engine Immobilizer System
*2: w/o Engine Immobilizer System BR G O10
IN2 3
IN112
B12 PCYL
DCYL 19
B11
11
B12
ILE Y
L 10
IB2 O
1
2 12
3
IB1G V Y8
IL1
Y (*2)
G (*2)
21
Y (*1)
26G (*1)5
4J2
4FBR
1
4H
5
4D
13
12
4D7
4L
1
4N
6
4HW-B
W-B
V
12
IK3 R 3
2A DOME
D.C.C 1
2IG
W-B
B R
R5
IE1
8
IE1
1
IE1 1DOOR
OFF
ON2
3
WW
W
+B1
CTY 712
6
1KP FR DOOR
12
1DD FR DOOR
1
1AW
B3
2ALT
1
Battery
FL MAINIC 4D R
W-B
W
- DIAGNOSTICSLIGHTING SYSTEM
05-1607
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

E74263
Multiplex Network Body ECU
Connector Front View:
B12B11
B12-12
B11-19 B12-1 1
05-1608
- DIAGNOSTICSLIGHTING SYSTEM
1798 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR(ILLUMINATION CIRCUIT)
(a) Disconnect the B11 and B12 connectors from the multiplex network body ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
B11-19 - Body groundAlways10 to 14 V
B12-1 1 - Body groundAlways10 to 14 V
B12-12 - Body groundAlways10 to 14 V
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

E50228E69434
Connector Front View:
I16
E74066
Connector Front View:
T7
E69342
Connector Front View:
I14
E72986
Connector Front View:
O5
- DIAGNOSTICSLIGHTING SYSTEM
05-1609
1799 Author
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:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 INSPECT INTERIOR LIGHT
(a) Inspect room lamp assy No.1 (interior light).
(1) Measure the resistance according to the value(s) in
the table below.
Standard:
Tester connectionConditionSpecified resistance
1 - 2Switch is OFFBelow 1 W
1 - 3Switch is OFFBelow 1 W
(2) Connect the positive (+) lead from the battery to ter-
minal 1 and negative (-) lead to terminal 2, then
check that the lamp comes on when the switch is in
the DOOR position.
OK: Lamp comes on.
(3) Connect the positive (+) lead from the battery to ter-
minal 1 and negative (-) lead to terminal 3, then
check that the lamp comes on when the switch is in
the ON position.
OK: Lamp comes on.
(b) Inspect key cylinder illumination.
(1) w/ Theft deterrent system:
Connect the positive (+) lead from the battery to ter-
minal 2 and negative (-) lead to terminal 6, then
check that the lamp comes on.
OK: Illumination comes on.
(2) w/o Theft deterrent system:
Connect the positive (+) lead from the battery to ter-
minal 2 and negative (-) lead to terminal 1, then
check that the lamp comes on.
OK: Illumination comes on.
(c) Inspect personal lamp (overhead J/B).
(1) Connect the positive (+) lead from the battery to ter-
minal 12 and negative (-) lead to terminal 7, then
check that the lamp comes on when switch is in the
DOOR position.
OK: Lamp comes on.

E69342
Connector Front View:
D5
D6
05-1610
- DIAGNOSTICSLIGHTING SYSTEM
1800 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(d) Inspect courtesy lamp.
(1) Connect the positive (+) lead from the battery to ter-
minal 1 and negative (-) lead to terminal 2, then
check that the lamp comes on.
OK: Lamp comes on.
NG REPLACE INTERIOR LIGHT (EACH OF ILLU-
MINATION LAMP)
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF ILLUMINATION CIRCUIT)