Page 1497 of 2572
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
1797 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM
Page 1498 of 2572
E74263
Multiplex Network Body ECU
Connector Front View:
B12B11
B12-12
B11-19 B12-1 1
05-1608
- DIAGNOSTICSLIGHTING SYSTEM
1798 Author: Date:
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)
Page 1499 of 2572

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: Date:
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.
Page 1500 of 2572
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)
Page 1501 of 2572
B51273
2G E3
Security Courtesy Switch
(Engine Hood Courtesy Switch)
IK315
G-B
J1
J/CT4 Theft Warning ECU Assy
6
IL2DSWH 34
W
EGW-B
1
A
I04148
Not Pushed (ON)
Pushed
(OFF)Security
Courtesy Switch
05-2038
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
2228 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ENGINE HOOD COURTESY SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The hood door courtesy switch is built in the engine hood lock assembly. The switch comes on when the
engine hood is opened and goes off when the engine hood is closed.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT SECURITY COURTESY SWITCH
(a) Remove the courtesy switch.
(b) Measure the resistance of the switch.
Tester ConnectionConditionSpecified Condition
1-2Pushed (OFF (Lock))10 kW or higher
1-2Not pushed (ON (Unlock))Below 1 W
NG REPLACE SECURITY COURTESY SWITCH
OK
05ITP-01
Page 1502 of 2572
B77252
T4
Theft Warning ECU Assy Wire Harness Side
E3
Security Courtesy Switch
B31016
E3
Security Courtesy Switch Wire Harness Side
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
05-2039
2229 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK WIRE HARNESS
(THEFT WARNING ECU ASSY - SECURITY COURTESY SWITCH
(a) Disconnect the T4 ECU connector.
(b) Disconnect the E3 switch connector.
(c) Measure the resistance between the wire harness side
connectors.
Standard:
Tester ConnectionSpecified Condition
T4-34 (DSWH) - E3-1Below 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK WIRE HARNESS
(SECURITY COURTESY SWITCH - BODY GROUND)
(a) Disconnect the E3 switch connector.
(b) Measure the resistance between the wire harness side
connector and body ground.
Standard:
Tester ConnectionSpecified Condition
E3-2 - Body groundBelow 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE THEFT WARNING ECU ASSY
Page 1503 of 2572
![TOYOTA HIGHLANDER 2001 Service Repair Manual 05F2X-05
C81121D25472
SST
SST
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-891
1081 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HYDRAULIC TEST
1. PERFORM TOYOTA HIGHLANDER 2001 Service Repair Manual 05F2X-05
C81121D25472
SST
SST
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-891
1081 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HYDRAULIC TEST
1. PERFORM](/manual-img/14/57457/w960_57457-1502.png)
05F2X-05
C81121D25472
SST
SST
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-891
1081 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HYDRAULIC TEST
1. PERFORM HYDRAULIC TEST
(a) Measure the line pressure.
NOTICE:
Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80°C (122 to 176°F).
The line pressure test should always be carried out in pairs. One technician should observe
the conditions of wheels or wheel stopper outside the vehicle while the other is doing the test.
Be careful to prevent SST's hose from interfering with the exhaust pipe.
(1) Warm up the ATF.
(2) Remove the test plug on the front side of the trans-
axle case and connect SST.
SST 09992-00095 (09992- 00231, 09992-00271)
(3) Fully apply the parking brake and chock the 4
wheels.
(4) Connect an OBD II scan tool or hand-held tester to
the DLC3.
(5) Start the engine and check idling speed.
(6) Keep your left foot pressing firmly on the brake ped-
al and shift into D position.
(7) Measure the line pressure when the engine is idling.
(8) Depress the accelerator pedal all the way down.
Quickly read the highest line pressure when engine
speed reaches stall speed.
(9) In the same way, do the test in R position.
Specified line pressure:
ConditionD position kPa (kgf / cm2, psi)R position kPa (kgf / cm2, psi)
Idling372 to 412 kPa
(3.8 to 4.2 kgf/cm2, 54 to 60 psi)
672 to 742 kPa
(6.9 to 7.6 kgf/cm2, 97 to 108 psi)
Stall test931 to 1,031 kPa
(9.5 to 10.5 kgf/cm2, 135 to 150 psi)
1,768 to 1,968 kPa
(18.0 to 20.0 kgf/cm2, 256 to 285 psi)
Evaluation:
ProblemPossible cause
If the measured values at all positions are higherLine pressure control solenoid (SLT) defective
Regulator valve detective
If the measured values at all positions are lower
Line pressure control solenoid (SLT) defective
Regulator valve detective
Oil pump defective
U/D (Underdrive) direct clutch defective
If pressure is low in the D position onlyD position circuit fluid leak
Forward clutch defective
If pressure is low in the R position only
R position circuit fluid leak
Direct clutch defective
1st and reverse brake defective
Page 1504 of 2572
I40146
LBE-
LBE+A162
A166
A1619
A16113
1 R
G9
MPX+
BEAN
B19
Front Seat Inner Belt Assy (Driver's Side) Airbag Sensor AssemblyC12
Combination Meter Assy
(*2) (*1)
(*2) (*1)
*1: w/o Curtain Shield Airbag
*2: w/ Curtain Shield Airbag
05-1898
- DIAGNOSTICSCOMBINATION METER
2088 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SEAT BELT WARNING LAMP FOR DRIVER'S SEAT DOES NOT
OPERATE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
If there is an open in the ground circuit (Airbag sensor assy center), the airbag sensor assy center outputs
DTCs. Perform troubleshooting with the ºSupplemental Restraint System 05-1200º.
1 PERFORM ACTIVE TEST BY HAND-HELD TESTER
(a) Operate the hand-held tester according to the steps on the display and select the ºACTIVE TESTº.
METER:
ItemTest DetailsDiagnostic Note
D-BEL T REMINDIndicat. Lamp D-SEAT BELT (OFF/ON)Confirm that the vehicle is stopped and engine
idling
NG REPLACE COMBINATION METER ASSY
(SEE PAGE 71-18)
OK
05IQ1-02