engine TOYOTA HIGHLANDER 2001 Service Repair Manual

E72974
2I
2I-1 Engine Room J/B
Connector Front View:
- DIAGNOSTICSLIGHTING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK HARNESS AND CONNECTOR(POWER SOURCE CIRCUIT)
(a) Disconnect the 2I connector from the engine room J/B.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2I-1 - Body groundAlways10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ENGINE ROOM J/B

I40214
Radio Receiver Assy
Center J/B C11
Combination Meter Assy
Taillight System
F7
Fusible Link BlockILL-
ILL+ ILL
3F5
3F9
3F13 3G2
3D3
3E 10
3A 12
3I8
1 6
37
11
1222B
G
ORV
W
1A
1J 1K2A2I 4D 4HPassenger Side J/B
Engine Room J/B
Instrument Panel J/B
BW5
10 12
11
7
3
5
2
11LGR2
R3
IL2
IK3W-B
W-B
2
3 1
WALTDOME
D.C.C
TAILLIGHT Relay PANEL
FL MAIN
Battery
IB V
4VR4
R412
2 (*1) (*2)
(*1)(*2)
*1:JBL Type
*2:Standard Type 05-1648
- DIAGNOSTICSAUDIO SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

05F3E-05
05-902- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MONITOR DRIVE PATTERN
1. MONITOR DRIVE PATTERN FOR ECT TEST
(a) Perform this drive pattern as one method to simulate the detection conditions of the ECT malfunctions.
(The DTCs may not be detected due the actual driving conditions. And some codes may not be de-
tected through this drive pattern).
HINT:
Preparation for driving

Warm up the engine sufficiently. (Engine coolant temperature is 60 °C (140 °F) or higher)

Drive the vehicle when the atmospheric temperature is -10 °C (14 °F) or higher. (Malfunction is not
detected when the atmospheric temperature is -10 °C (14 °F) or less)
Driving note

Drive the vehicle through all gears.
Stop " 1st " 2nd " 3rd " O/D " O/D (lock-up ON).

Repeat the above driving pattern three times or more.
NOTICE:

The monitor status can be checked using the OBD II scan tool. When using the hand-held tes-
ter, monitor status can be found in the ºENHANCED OBD II/DATA LISTº or under ºCARB OBD
IIº.

In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other
factors) the drive pattern can be resumed and, in most cases, the monitor can be completed.
CAUTION:
Perform this drive pattern on a level road as much as possible and strictly observe the posted speed
limits and traffic laws while driving.

05F2W-05
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-889
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MECHANICAL SYSTEM TESTS
1. PERFORM MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring
the stall speeds in the D and R positions.
NOTICE:

Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80°C (122 to 176°F).

Do not continuously run this test for longer than 10 seconds.

To ensure safety, do this test in a wide, clear level area which provides good traction.

The stall test should always be carried out in pairs. One technician should observe the condi-
tions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
(1) Chock the 4 wheels.
(2) Connect an OBD II scan tool or hand-held tester to the DLC3.
(3) Fully apply the parking brake.
(4) Keep your left foot pressed firmly on the brake pedal.
(5) Start the engine.
(6) Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,250
150 rpm
(8) Do the same test in the R position.
Stall speed: 2,250
150 rpm
Evaluation:
ProblemPossible cause
(a) Stall engine speed is low in D and R positions

Engine power output may be insufficient

Stator one-way clutch not operating properly
HINT: If the value is less than the specified value by 600 rpm or
more, the torque converter could be faulty.
(b) Stall engine speed is high in D position

Line pressure is too low

Forward clutch slipping

No. 2 one-way clutch not operating properly

U/D (Underdrive) clutch slipping
(c) Stall engine speed is high in R position

Line pressure is too low

Direct clutch slipping

1st and reverse brake slipping

U/D (Underdrive) clutch slipping
(d) Stall engine speed is high in D and R positions

Line pressure is too low

Improper fluid level

U/D (Underdrive) one-way clutch not operating properly

05-890- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1080 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(b) Measure the time lag.
(1) When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag
before the shock can be felt. This is used for checking the condition of the direct clutch, forward
clutch, and 1st and reverse brake.
NOTICE:

Perform the test at the normal operating ATF temperature 50 to 80 °C (122 to 176 °F).

Be sure to allow 1 minute interval between tests.

Perform the test three times, and measure the time lags. Calculate the average value of the three
time lags.
(2) Connect an OBD II scan tool or hand-held tester to the DLC3.
(3) Fully apply the parking brake.
(4) Start and warm up the engine and check idle speed.
Idle speed: approx. 700 rpm (In N position and A/C OFF)
(5) Shift the lever from N to D position. Using a stop watch, measure the time from when the lever
is shifted until the shock is felt.
Time lag: N " D less than 1.2 seconds
(6) In the same way, measure the time lag for N " R.
Time lag: N " R less than 1.5 seconds
Evaluation (If N " D or N " R time lag is longer than the specified):
ProblemPossible cause
N " D time lag is longer

Line pressure is too low

Forward clutch worn

U/D (Underdrive) one-way clutch not operating
N " R time lag is longer

Line pressure is too low

Direct clutch worn

1st and reverse brake worn

U/D (Underdrive) one-way clutch not operating properly

I40141
W
4M4
4E1
P
P
P EEC1113
IL19
SB J6
J/C
C111
C112
C1111
3B12
3K2
BR
R
IB Battery FL MAINCenter J/B Instrument Panel J/BEngine Room J/B Instrument Panel J/B
1C6
1A1
12AM1 2I1
4
2A
IC11 D.C.C ECU-B
1
2 WB AM2
ALT10 3W
L-Y F7
FL BlockIC35AM1
AM2 IG1
IG2
W-L BR1C 1C
1K1 117
1K13
1G6
1G10HEATER
IGN
6 42 7
7W
Y
LG G
GR B
I15
Ignition SW Center J/B
3A4
3C7Combination Meter Assy
Passenger Side J/B
- DIAGNOSTICSCOMBINATION METER
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ENTIRE COMBINATION METER DOES NOT OPERATE
WIRING DIAGRAM
05IPX-02

I30440
Wire Harness View:
C12-6
A05135
- DIAGNOSTICSCOMBINATION METER
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 INSPECT COMBINATION METER ASSY
INSPECTION USING OSCILLOSCOPE
(a) Check the input signal waveform.
(1) Remove the combination meter assy.
(2) Connect the oscilloscope to the terminals C12-6
and body ground.
(3) Start the engine.
(4) Check the signal waveform according to the condi-
tion (s) in the table below.
ItemCondition
Tool setting5 V/DIV, 20 ms/DIV
Vehicle conditionDriving at approx. 20 Km/h (12 mph)
OK:
As shown in the illustration
HINT:
As vehicle speed increases, the cycle of the signal waveform
narrows.
NG Go to step 5
OK
REPLACE COMBINATION METER ASSY(SEE PAGE 71-18)

I39187
Gateway ECU
Center J/B
Instrument Panel J/B
Passenger Side J/B
Instrument Panel J/B I15
IGNITION SW
F7
FL Block
Engine Room J/B
Center J/BIG
ACC
BATT
GNDCG RAD No.2IG1
ACC
IG1 AM1AM1
ALT
D.C.C
DOME
IB Battery FL MAINW-B W-B
W-B W
3F 13
3G6 3G5
G5 14G57 2A3
2I1
3 12 W43
2W
1C6
2
11A1V
IK312
V
4H6
4D11
V
IL211
LG L G
1C2 1C7
1J6 1K 10
W GR
3F9 3A8 3A 10
3F8 3D1 3I1
LG SBB
G58 G59 G52
B 05-1834
- DIAGNOSTICSNAVIGATION SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
POWER SOURCE CIRCUIT (GATEWAY ECU)
CIRCUIT DESCRIPTION
This circuit provides power to the gateway ECU.
WIRING DIAGRAM
05ISY-02

I39189
Navigation ECU
Center J/B Instrument Panel J/B
Passenger Side J/B
Instrument Panel J/B I15
IGNITION SW
F7
FL Block
Engine Room J/B
Center J/BACC
+B
GND1
IB
Battery FL MAINALT
D.C.C
DOME ACC AM1AM1 RAD No.2
W-B W-BV
W WBW LV V LGW GR V
N317
3I2
3F132A3
2I1 2
1321C6
211A1IK312
4H6
4D 11
IL211 1C2
1K3
3F9 3A13
3I7 3I 10
N39 N3 18
3 05-1830
- DIAGNOSTICSNAVIGATION SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
POWER SOURCE CIRCUIT (NAVIGATION ECU)
CIRCUIT DESCRIPTION
This circuit provides power to the navigation ECU.
WIRING DIAGRAM
05CEG-08

I40219
Multi-display Assy Center J/B C11
Combination Meter
Taillight System
F7
FL BlockILL-
ILL+ 3F5
3F9
3F13 3F3
3D3
3E 10
3A12
3I4
1 6
37
11
1222B
G
ORV
W
1A
1J 1K2A 2I4D 4HPassenger Side J/B
Engine Room J/B
Instrument Panel J/B
BB2
1 12
11
7
3
5
211LGM3
M3
IL2 IK3W-B
W-B
2
3 1
WALTDOME D.C.C
TAILLIGHT Relay PANEL
FL MAIN
Battery
IB V
4V
- DIAGNOSTICSNAVIGATION SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM