TOYOTA HIGHLANDER 2001 Service Repair Manual
Page 1471 of 2572
B51849
Driving Axis
ClockwiseCounterclock-
wise
05-1928
- DIAGNOSTICSPOWER WINDOW CONTROL SYSTEM
2118 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
11 INSPECT POWER WINDOW REGULATOR MOTOR ASSY LH (REAR LH)
(a) Inspect the operation of the power window regulator mo-
tor assy LH (Rear LH side).
(1) Check that the motor operates smoothly when the
battery voltage is applied to each terminal of the
connector.
Standard:
Measuring conditionOperational direction
Battery positive - Terminal 4
Battery negative - Terminal 5Clockwise rotation toward driving axis
Battery positive - Terminal 5
Battery negative - Terminal 4Counterclockwise rotation toward driving axis
(b) Inspect the PTC operation inside the power window regulator motor.
NOTICE:
The inspection should be performed with the power window regulator and door glass installed to the
vehicle.
(1) Set a DC 400 A probe of the electrical tester in the wire harness of terminal 1 or 2.
NOTICE:
Match the arrow mark of the probe with the current direction.
(2) Set the door glass in the fully closed position.
(3) When 60 seconds have elapsed after the door glass is fully closed, check now long the current
takes to charge, from approximately 16 - 34 A into 1 A or less, when the power window switch
is turned UP once again.
Standard: Approximately 4 - 90 seconds
(4) When approximately 60 seconds have elapsed after the inspection of the current cut-off, check
that the door glass goes down when the power window regulator switch is turned DOWN.
NG REPLACE POWER WINDOW REGULATOR
MOTOR ASSY LH
OK
REPAIR OR REPLACE HARNESS AND CONNECTOR
Page 1472 of 2572
I38766
A/C Amplifier Assy
IG 3JA10 HEATER
AM14
B7
BR2
Battery FL MAINInstrument Panel J/B
Center J/B
3A 2
IG14
G
W7
613
1
1A 1C 1C1K
AM1
1 2
B
2
1
ALT
WF7
Fusible
Link
Block I15
Ignition SW
IB3FGND A1011
W-B 6
3J 13
W-B 05-1 170
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1360 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
IG POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
This is the power source for the A/C amplifier assy and servomotor, etc.
WIRING DIAGRAM
05IU2-01
Page 1473 of 2572
I30331GND (-)IG (+) A/C Amplifier Connector
Wire Harness View:
A10
I38763
GND
A/C Amplifier Connector Wire Harness View:
A10
- DIAGNOSTICSAIR CONDITIONING SYSTEM
05-1 171
1361 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK FUSE(HEATER, AM1 FUSES)
(a) Remove the HEATER and AM1 fuses from the instrument panel J/B.
(b) Check that the continuity exists in HEATER and AM1 fuses.
NG REPLACE FUSE
OK
2 INSPECT AIRCONDITIONER AMPLIFIER ASSY(IG, GND)
(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
A10-2 (IG) -
A10-1 1 (GND)Ignition switch ON10 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 - BODY GROUND)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A10-1 1 (GND) -
Body groundAlwaysBelow 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
Page 1474 of 2572
I38763
IG
A/C Amplifier Connector Wire Harness View:
A10
05-1 172
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1362 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK HARNESS AND CONNECTOR(A/C AMPLIFIER ASSY - BATTERY)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A10-2 (IG) -
Body groundIgnition switch
OFF " ONBelow 1.0 V " 10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE AIRCONDITIONER AMPLIFIER ASSY
Page 1475 of 2572
I30515
+B A1012
1K
IC3Instrument Panel J/B
W 2
1ECU-B Engine Room J/B
FL MAIN
BatteryA/C Amplifier Assy
10
1G BR W-L5 4
2A D.C.C
2I W
1 3
WF7
Fusible
Link
Block
- DIAGNOSTICSAIR CONDITIONING SYSTEM
05-1 173
1363 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
BACK-UP POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
This is the back-up power source for the A/C amplifier assy. Power is supplied even when the ignition switch
is off and is used for diagnostic trouble code memory, etc.
WIRING DIAGRAM
05IU3-01
Page 1476 of 2572
I30331+B (+)
A/C Amplifier Connector
Wire Harness View:
A10
I38763
A10
GND+B
A/C Amplifier Connector Wire Harness View:
05-1 174
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1364 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK FUSE(ECU-B FUSE)
(a) Remove the ECU-B fuse from the engine room J/B.
(b) Check that the continuity exits of ECU-B fuse.
NG REPLACE FUSE
OK
2 INSPECT AIRCONDITIONER AMPLIFIER ASSY(+B)
(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
A10-12 (+B) -
Body groundAlways10 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
A10-12 (+B) -
A10-1 1 (GND)Always10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE AIRCONDITIONER AMPLIFIER ASSY
Page 1477 of 2572
I40780
A/C Amplifier Assy
A10 HR O
1H9
Heater
Relay
35
G7
2 J5
J/C
HEATER 10A
AM17
IG1
1
28
6 I15
Ignition SW
A
W
FL MAIN
BatteryInstrument Panel J/B
IL2 BR Y
Y
A 1G
1A 1C 1C
1 4 2
W
1
7
F7
Fusible Link BlockALTHEATER 50A 2B
B-YW
1 IK442
4H4L7 7
W-B
W-B
IC Passenger Side J/BFrom Blower
Motor AM1B
- DIAGNOSTICSAIR CONDITIONING SYSTEM
05-1 187
1377 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HEATER RELAY CIRCUIT
CIRCUIT DESCRIPTION
The heater relay is switched on by signals from the A/C amplifier assy. It supplies power to the blower motor.
WIRING DIAGRAM
05IU7-03
Page 1478 of 2572
Z19533
5
4 3
12125
4 3
I30331HR
A/C Amplifier Connector
Wire Harness View:
A10
05-1 188
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1378 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK FUSE(15 A HEATER, 50 A HEATER, AM1 FUSES)
(a) Remove the 15 A HEATER and AM1 fuses from the instrument panel J/B.
(b) Remove the 50 A HEATER fuse from fusible link block.
(c) Check that the continuity exists in 15 A HEATER and 50 A HEATER, AM1 fuses.
NG REPLACE FUSE
OK
2 INSPECT HEATER BLOWER MOTOR RELAY ASSY
(a) Check that the continuity exists between each pair of ter-
minals of heater blower motor relay assy, as shown in the
chart.
Tester connectionConditionSpecified condition
2 - 1Always10 kW or higher
2 - 4AlwaysBelow 1.0 W
(b) Check continuity between each pair of terminals, as
shown the chart.
Tester connectionConditionSpecified condition
2 - 1When battery voltage ap-
plied to terminals 3 and 5Below 1.0 W
2 - 4When battery voltage ap-
plied to terminals 3 and 510 kW or higher
NG REPLACE HEATER BLOWER MOTOR RELAY
ASSY
OK
3 INSPECT AIRCONDITIONER AMPLIFIER ASSY(HR)
(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
A10-7 (HR) -
Body groundIgnition switch OFF0 V
A10-7 (HR) -
Body groundIgnition switch ON
Blower switch ONBelow 1.0 V
A10-7 (HR) -
Body groundIgnition switch ON
Blower switch OFF10 to 14 V
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
NG
Page 1479 of 2572
I38763
A10
A/C Amplifier Connector Wire Harness View:
HR
- DIAGNOSTICSAIR CONDITIONING SYSTEM
05-1 189
1379 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK HARNESS AND CONNECTOR
(a) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
A10-7 (HR) -
Body groundIgnition switch
OFF " ONBelow 1 V " 10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPAIR OR REPLACE AIRCONDITIONER AMPLIFIER ASSY
Page 1480 of 2572
I30520
ECM
ACMG 2
E6 O
IK3 Magnetic Clutch Relay
9 18 From Fan No. 3
Relay
Y-G
Y-G
EB2
B-Y
3 2
3 8
A2
A/C Magnetic
Clutch and
Lock Sensor 3 2 1
52C
2E 2A B-R
IK27Engine Room J/B
Y From
Battery 05-1 190
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1380 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
COMPRESSOR CIRCUIT
CIRCUIT DESCRIPTION
The ECM and A/C amplifier communicate via BEAN.
The A/C amplifier assy outputs the magnetic clutch ON signal to the ECM.
Receiving this signal, the ECM sends a signal through terminal ACMG and switches the magnetic clutch
relay ON, thus turning on the magnetic clutch.
WIRING DIAGRAM
05IU8-01