engine 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

05F2X-05
C81121D25472
SST
SST
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-891
1081 Author
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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

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)

052IA-27
- DIAGNOSTICSENGINE IMMOBILIZER SYSTEM
05-1985
2175 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ENGINE IMMOBILIZER SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
Use this procedure to troubleshoot the engine immobilizer system.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK
(see page 05-1987)
3 CRANK ENGINE FOR MORE THAN 10 SECONDS
4 CHECK DTC
(a) Check for DTCs and note any codes that are output.
(b) Delete the DTC.
(c) Recheck for DTCs. Try to prompt the DTC (SFI system and engine immobilizer system) by simulating
the original activity that the DTC suggested.
(1) If the DTC does not reoccur, proceed to A.
(2) If the DTC (SFI system) reoccurs, proceed to B.
(3) If the DTC (engine immobilizer system) reoccur, proceed to C.
B Go to SFI SYSTEM
(2AZ-FE engine: See page 05-1)
(3MZ-FE engine: See page 05-362)
C Go to step 8
A
5 READ VALUE OF HAND-HELD TESTER
(IMMOBILIZER ECU (TRANSPONDER KEY ECU ASSY) (SWITCH CONDITION))
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the item ºKEY SWº in the ºDATA LISTº and read its value displayed on the hand-held tester.
Transponder key ECU assy:
ItemMeasurement Item/
Display (Range)Normal ConditionDiagnostic Note
KEY SwitchUnlock warning switch signal
/ON or OFFON: Key is in ignition key cylinder
OFF: No key is in ignition key cyl-
inder
-
NG Go to DTC B2780 (see page 05-1998)

05-1986
- DIAGNOSTICSENGINE IMMOBILIZER SYSTEM
2176 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
OK
6 PROBLEM SYMPTOMS TABLE (see page 05-1997)
(a) When the problem is not listed on the problem symptoms table, proceed to A.
(b) When the problem is listed on the problem symptoms table, proceed to B.
B Go to step 8
A
7 PERFORM TROUBLESHOOTING ACCORDING TO MALFUNCTION SYMPTOM
(a) Pre-check (see page 05-1988)
(1) Inspect with the hand-held tester (ECU data monitor).
(2) Inspect with the hand-held tester (ACTIVE TEST).
(b) Terminals of ECU
(see page 05-1993)
8 ADJUST, REPAIR OR REPLACE
END

E74076
Engine Room J/B
Body ECU
HEAD LAMP Relay
Engine Room R/B
H-LP RH LWR
H-LP LH LWR
H4
Headlamp RH (Low)H2
Headlamp LH (Low)
F7
FL Block
Battery FL MAINHRLY MAIN
L-R
R-B
W-B R-W
W-B R-Y
J3
J/C
EA3
B11 R 1
2B
1
2G 3
2 4
1 2 1 1
2I4
IK3
2
2
221
21
21
21
31W W
A
A 05-1556
- DIAGNOSTICSLIGHTING SYSTEM
1746 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HEADLIGHT RELAY CIRCUIT
CIRCUIT DESCRIPTION
The multiplex network body ECU controls the HEAD relay when a signal is received from the headlamp dim-
mer switch assy.
WIRING DIAGRAM
05IQ9-01

E72974
2B
2B-1 Engine Room J/B
Connector Front View:
05-1558
- DIAGNOSTICSLIGHTING SYSTEM
1748 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 INSPECT ENGINE ROOM J/B
(a) Disconnect the 2B connector from the engine room J/B.
(b) Using a service wire, connect 2B-1 of the engine room J/B side and body ground.
OK: Headlamp comes on.
NG Go to step 4
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE ROOM J/B - MULTIPLEX NETWORK
BODY ECU)

E72974
2G
2G-1 Engine Room J/B
Connector Front View:
- DIAGNOSTICSLIGHTING SYSTEM
05-1559
1749 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 INSPECT ENGINE ROOM J/B
(a) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2G-1 - Body groundConnect 2B-1 and body ground10 to 14 V
NG Go to step 5
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (EACH OF HEADLAMP CIRCUIT)

E72974
2B
2B-1 Engine Room J/B
Connector Front View:
05-1560
- DIAGNOSTICSLIGHTING SYSTEM
1750 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 INSPECT ENGINE ROOM J/B
(a) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2B-1 - Body groundAlways10 to 14 V
NG Go to step 6
OK
REPLACE ENGINE ROOM J/B