TOYOTA HIGHLANDER 2001 Service Repair Manual

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
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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

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
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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

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 higher
Line 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 only
D 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

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

I40135
B4
Front Seat Inner Belt Assy (Driver Side)
Connector Front View:
E58133
B4
Front Seat Inner Belt Assy (Driver Side)
Wire Harness View:
- DIAGNOSTICSCOMBINATION METER
05-1899
2089 Author
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:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 READ VALUE OF HAND-HELD TESTER(DRIVER SEAT BELT)
(a) Operate the hand-held tester according to the steps on the display and select the ºDATA LISTº.
SRS AIRBAG:
ItemMeasurement Item/
Range (Display)Normal ConditionDiagnostic Note
D SEAT BUCKLDriver seat belt buckle switch is
ON / OFFON: Seat belt is fastened
OFF: Seat belt is unfastened-
NG Go to step 3
OK
REPLACE COMBINATION METER ASSY(SEE PAGE 71-18)
3 INSPECT FRONT SEAT INNER BELT ASSY (DRIVER SIDE)
(a) Disconnect the connector from the front seat inner belt
assy (Driver Side).
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Terminal NoConditionSpecified condition
B4-2 - B4-5Seat belt is fastenedApprox. 330 W
B4-2 - B4-5Seat belt is unfastenedApprox. 1,330 W
NG REPLACE FRONT SEAT INNER BELT ASSY
(DRIVER SIDE)
OK
4 CHECK HARNESS AND CONNECTOR(FRONT SEAT INNER BELT ASSY - BODY
GROUND)(SEE PAGE 01-26)
(a) Disconnect the connector from the front seat inner belt
assy (Driver Side).
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionConditionSpecified Condition
B4-5 - Body groundAlwaysBelow 1 W
NG Go to step 5
OK
END

I39225
Front Seat Inner Belt Assy (Driver Side)
Wire Harness View:
B4
Airbag Sensor Assy Center
Wire Harness View:
A23
05-1900
- DIAGNOSTICSCOMBINATION METER
2090 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 CHECK HARNESS AND CONNECTOR(FRONT SEAT INNER BELT ASSY - AIRBAG
SENSOR ASSY CENTER)(SEE PAGE 01-26)
(a) Disconnect the B4, A23 connectors.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionConditionSpecified Condition
B4-2 - A23-10AlwaysBelow 1 W
A23-10 - Body groundAlways10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
END

E74083
I15
Ignition SWInstrument Panel J/B
Center J/BBody ECU
F7
FL Block
FL MAIN
Battery2
1C
7
1C
6
1C6
1J
10
1K
1
1A8
3A
10
3A6
3C
5
3B17
B9
5
B9ACC
IG ACC
IG1 AM1IG1
AM1 RAD No.2
L
G
43
2
W
W
B
2 1B
BR W
GR
ALT1 2 05-1594
- DIAGNOSTICSLIGHTING SYSTEM
1784 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
IGNITION SWITCH CIRCUIT
CIRCUIT DESCRIPTION
This circuit detects the state of the ignition switch and sends it to the multiplex network body ECU.
WIRING DIAGRAM
05IQE-01

E74263
Multiplex Network Body ECU
Connector Front View:
B9
B9-5B9-17
- DIAGNOSTICSLIGHTING SYSTEM
05-1595
1785 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Inspect if another system (engine, wiper and so on) is normal before performing this procedure.
1 CHECK HARNESS AND CONNECTOR(IGNITION SWITCH CIRCUIT)
(a) Disconnect the B9 connector from multiplex network body ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
B9-5 - Body groundIgnition switch is ON
Ignition switch is OFF10 to 14 V
Below 1 V
B9-17 - Body groundIgnition switch is ACC
Ignition switch is OFF10 to 14 V
Below 1 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (IGNITION SWITCH - MULTIPLEX
NETWORK BODY ECU)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

B65516
1
T5
Security Indicator
Lamp Assy11
13
3F W-B
IB2B
3BTheft Warning ECU Assy
2
IND 3C25 8
T4 R 3F
W-BCenter J/B
B51710
1
2
05-2024
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
2214 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INDICATOR LIGHT CIRCUIT
CIRCUIT DESCRIPTION
While the theft deterrent system is preparing to be set, this circuit lights up the indicator lamp. When the sys-
tem is set, it continuously turns the indicator lamp on for 0.75 seconds and then turns it off for 1.25 seconds,
thus the indicator lamp blinks.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK SECURITY INDICATOR LAMP ASSY (OPERATION)
(a) Disconnect the T5 indicator lamp connector.
(b) Check if the security indicator lamp comes on when bat-
tery voltage is applied to each terminal of the connector.
Standard:
Measuring ConditionSpecified Operation
Battery positive (+) - Terminal 2
Battery negative (-) - Terminal 1Indicator lamp comes on.
NG REPLACE SECURITY INDICATOR LAMP ASSY
OK
05ITK-02

B77249
Wire Harness Side
T5
Security Indicator
Lamp Assy
T4
Theft Warning ECU Assy
B78292
Wire Harness Side
T5
Theft Deterrent
Indicator Lamp Assy
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
05-2025
2215 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK WIRE HARNESS
(THEFT WARNING ECU ASSY - SECURITY INDICATOR LAMP ASSY)
(a) Disconnect the T5 indicator lamp and T4 ECU connectors
(b) Measure the resistance between the wire harness side
connecters.
Standard:
Tester ConnectionSpecified Condition
T4-25 (IND) - T5-2Below 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK WIRE HARNESS (SECURITY INDICATOR LAMP ASSY - BODY GROUND)
(a) Disconnect the T5 indicator lamp connector
(b) Measure the resistance between the wire harness side
connector and body ground.
Standard:
Tester ConnectionSpecified Condition
T5-1 - Body groundBelow 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE THEFT WARNING ECU ASSY