engine TOYOTA HIGHLANDER 2001 Service Repair Manual

A78886
Idling
Ignition Switch OFF40 km/h
(25 mph)
Over 2 minutes Over 500 seconds 05-30
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
220 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5. OXYGEN / A/F SENSOR HEATER MONITOR
(a) Preconditions
The monitor will not run unless:
The MIL is OFF.
(b) Drive Pattern
(1) Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions (refer to
step (a)).
(2) Start the engine and allow it to idle for 500 seconds
or more.
(3) Drive the vehicle at 40 km/h (25 mph) or more for at least 2 minutes.
(4) Check the readiness monitor status. If the readiness monitor status did not change to ºcompleteº,
check preconditions, turn the ignition switch OFF, and repeat steps (2) and (3).

Your VIN is incorrect.
Please enter the VIN again.
Input a new VIN
PRESS [ENTER] If you want to clear the VIN,
press [NO] key.
To Menu Screen
Writing Succeeded
[ENTER] Continued from previous page
WRITING COMPLETE
NOW WRITING
Input Error
INPUT ERROR
[EXIT] to RETURN
[EXIT]
WRITING FAILED
Turn IG OFF, then ON.
Please try again.
PRESS [EXIT]
[EXIT]Writing Error
SET NEW VIN
Press [RIGHT]/[LEFT] to shift
the cursor right/left.
Press [UP]/[DOWN] to
increase/decrease value.
Or, input digit with the 10 key.
PRESS [ENTER]CONFIRMATION
PRESS [ENTER] Vehicle is stopped.
New Registration
[ENTER]
[ENTER]
PRESS [ENTER]
Communication Error
[ENTER]
COMMUNICATION ERROR
PRESS [EXIT] Turn IG OFF, then ON.
VIN input method
The following VIN has been
written correctly.
The DTCs have been erased
correctly.
To Menu Screen To Menu Screen
[EXIT] Input Instructions
Engine is not running.
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-15
205 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)

I37210
Multi-display
Controller Sub-assy
+B1
ACC
SELD
GND Y
R29
R29
R31
R2916
IO221
IK2 16 Engine Room R/B
2
2CRT
V V V
A
AJ17
J/C
2 1
Passenger Side J/B
8 2
4D 4E14
IO1G G
W
A
AJ18
J/C
32
Instrument Panel J/B
RAD No.2 1
1H Y
3ACC I15
Ignition SW
2
1CL
AM12
AM1
1
1A B6
1CW
12
F7
Fusible Link Block
7
W-B
29
W-B
CC C
J18
J/C
W-B
BF 2
ALT
W
1
3
FL MAIN
Battery W
(*1) (*1) (*1) (*1) (*1)
(*1)
*1: w/ Rear Seat Entertainment System
- DIAGNOSTICSAUDIO SYSTEM
05-1641
1831 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
POWER SOURCE CIRCUIT(MULTI-DISPLA Y CONTROLLER
SUB-ASSY)
CIRCUIT DESCRIPTION
This circuit provides the power to the multi-display controller sub-assy.
WIRING DIAGRAM
05IRL-02

05F2V-05
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-887
1077 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ROAD TEST
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem
is that the transaxle does not shift up, shift down, or the shift point is too high or too low, conduct the
following road test referring to the automatic shift schedule and simulate the problem symptoms.
2. ROAD TEST
NOTICE:
Perform the test at the ATF (Automatic Transmission Fluid) temperature 50 to 80°C (122 to 176°F) in
the normal operation.
(a) D position test:
Shift into the D position and fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that 1 " 2, 2 " 3 and 3 " O/D up-shifts take place, and that the shift points conform to
the automatic shift schedule (see page 03-51).
HINT:
O/D Gear Up-shift Prohibition Control

Engine coolant temperature is 60 °C (140 °F) or less and vehicle speed is at 70 km/h (43 mph) or less.

ATF temperature is 10 °C (50 °F) or less.
O/D Gear Lock-up Prohibition Control

Brake pedal is depressed.

Accelerator pedal is released.

Engine coolant temperature is 60 °C (140 °F) or less.
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3 and 3 " O/D up-shifts.
(3) Check for abnormal noise and vibration.
Check for abnormal noise and vibration when up-shifting from 1 " 2, 2 " 3 and 3 " O/D while
driving with the shift lever in the D position, and check while driving in the lock-up condition.
HINT:
The check for the cause of abnormal noise and vibration must be done thoroughly as it could also be due
to loss of balance in the differential, torque converter clutch, etc.
(4) Check kick-down operation.
Check vehicle speeds when the 2nd to 1st, 3rd to 2nd and O/D to 3rd kick-downs take place
while driving with the shift lever in the D position. Confirm that each speed is within the applicable
vehicle speed range indicated in the automatic shift schedule (see page 03-51).
(5) Check abnormal shock and slip at kick-down.
(6) Check the lock-up mechanism.

Drive in D position (O/D gear), at a steady speed (lock-up ON).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
HINT:

There is no lock-up function in the 1st and 2nd gear.

If there is a big jump in engine speed, there is no lock-up.

05-888- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1078 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(b) 2 position test:
Shift into the 2 position and fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that the 1 " 2 up-shift takes place and that the shift point conforms to the automatic shift
schedule (see page 03-51).
HINT:
There is no 3rd up-shift and lock-up in the 2 position.
(2) Check engine braking.
While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine
braking effect.
(3) Check for abnormal noise during acceleration and deceleration, and for shock at up-shift and
down-shift.
(c) L position test:
Shift into the L position and fully depress the accelerator pedal and check the following points.
(1) Check no up-shift.
While running in the L position, check that there is no up-shift to 2nd gear.
HINT:
There is no lock-up in the L position.
(2) Check engine braking.
While running in the L position, release the accelerator pedal and check the engine braking ef-
fect.
(3) Check for abnormal noise during acceleration and deceleration.
(d) R position test:
Shift into the R position, lightly depress the accelerator pedal, and check that the vehicle moves back-
ward without any abnormal noise or vibration.
CAUTION:
Before conducting this test ensure that the test area is free from people and obstruction.
(e) P position test:
Stop the vehicle on the grade (more than 5°) and after shifting into the P position, release the parking
brake. Then, check that the parking lock pawl holds the vehicle in place.

H45942
Airbag Sensor
Assy Center
A1724
Y 1
Combination Meter4A5
11
FL MAINShort Connector
GR
I15
Ignition SWBR
IB2 IF310
12 9MPX1
MPX2
A1722
1 IB2
3CC11 2
A11
Body ECUIL2
B9 54F
B10 7
6
121
C11
C11C12
IB F7 FL Block P51 1
2 2S30
S30 S31S31 MPD1
MPD2 9
A10MPX+
MPX-
MPX1
MPX2
MPX1
MPX2
3A12
2
3B 3K
13
1K7
IC
ALT
1
1ABR R G V G
BR
SB
YOW
SB 4 11
7
8
P B
G
WW
BatteryAM1 HEATERG5
Gate Way ECU A/C
Control Assembly
E6
Engine
Control Module Passenger Side J/B
V
IL21
MPX2
MPX1
3J12
3E1 3H5
MPX1
6
1C Instrument Panel J/B
AM1 2
4
IG1 Instrument Panel J/B
B BY
Center J/B T4
Theft Deterrent ECU(*1) (*1)12
SW with ECU Power Window Master
GR
V31
(*3) Center J/B
GSB *1: w/ Navigation System
*2: w/o Navigation System
*3: w/ Theft Deterrent System G
(*2)
18
29
12
12RBR 05-1518
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1708 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

B80388
S20
Sliding Roof Control ECU
B
IGECUB
UP
E
MPX2 7
1098
GR V
MPX+ 5
4
9 106 1 IE1
E6 IE1 8 82
4L
SB 11C 9
6
Battery FL Main2
1BR2
1 I15
Ignition SW
1 W
BW
W-B 4 6G
W-L
W-BY P
6 54
4M4DPassenger Side J/B
ECM EEJ/C
P
IE13 J17
B
IA ICDWN
MPX1 Instrument
Panel J/B
IG1 AM1
1C 1H 1D
1D 1A
1G
S/ROOF AM1
G
W
IE1
IC3 5
2A
2I
IG1
W W
1E
ALT
2 3 1
D.C.C ECU-B
4 Engine
Room J/B6
11
W-B
7
IE1
29
GR
C12
Combination
Meter IL2 W-B
74L 4N
1
W-B
W-B
W-B
1DW-B
IG
9UP
IG3 DWN
GRR 1 2
GND
F7
FL Block
Instrument
Panel J/B
14
O5
Over Head J/B
- DIAGNOSTICSSLIDING ROOF SYSTEM
05-1981
2171 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SLIDING ROOF DOES NOT MOVE BY SLIDING ROOF CONTROL
SWITCH
CIRCUIT DESCRIPTION
The sliding roof drive gear sub-assy (sliding roof ECU) monitors a sliding roof motor switch signal in line,
and the motor built in the sliding roof drive gear sub-assy (sliding roof ECU) is driven.
WIRING DIAGRAM
05JFT-02

05IS8-02
I38139
I38140
I38141
- DIAGNOSTICSNAVIGATION SYSTEM
05-1775
1965 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SYSTEM NORMAL CONDITION CHECK
(f) If the symptom is applicable to any of the following, it is intended behavior, and not a malfunction.
SymptomAnswer
A longer route than expected is chosen.Depending on the road conditions, the navigation ECU may determine that a longer
route is quicker.
Even when distance priority is high, the shortest route is not
shown.Some paths may not be advised due to safety concerns.
When the vehicle is put into motion immediately after the
engine starts, the navigation system deviates from the actu-
al position.If the vehicle starts before the navigation system activates, the system may not
react.
When running on certain types of roads, especially new
roads, the vehicle position deviates from the actual position.When the vehicle is driving on new roads not available on the map disc, the system
attempts to match it to another nearby road, causing the position mark to deviate.
(g) The following symptoms are not a malfunction, but are
caused by errors inherent in the GPS, gyro sensor, speed
sensor, and navigation ECU.
(1) The current position mark may be displayed on a
nearby parallel road the vehicle actually runs on.
(2) Immediately after a fork in the road, the current ve-
hicle position mark may be displayed on the wrong
road.
(3) When the vehicle turns right or left at an intersec-
tion, the current vehicle position mark may be dis-
played on a nearby parallel road.

H45940
Airbag Sensor
Assy Center
A1724
1
Combination Meter4A5Short Connector
GR
M3
Multi-DisplayBR
IB2IF310A1722
21 IB2
4C2
A11
Body ECU IL2
B9 54F
B10 7
6
6C11 P51
1
2
2S30
S30
S31 S31 9
A10MPX+
MPX-
MPX1
MPX2
MPX1
MPX2
7BR R G V
G
BR SB
O
SB 4 11
7
8G5 Gateway ECU A/C Control Assembly
Passenger Side J/B
V
E6 18
3J 12
3E1 3H5
MPX1
IC YT4 (*1) (*1)12
SW with ECU Power Window Master
GR
V
31
(*3) Center J/B
G
*1: w/ Navigation System
*2: w/o Navigation System
*3: w/ Theft Deterrent System G
(*2)
Y
9
C12 MPX+
MPX-IL21
GR29
E6
20
E5 J16
J/C
Passenger Side J/B
4N1 O
DD
TC
CGD
IF33
TC
4 W-B W-BTheft Deterrent ECUEngine
Control Module 8
O
OP D3
DLC3W MPD1
MPD2
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1523
1713 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
WIRING DIAGRAM

B80404
2A1G IC3
BATTERY FL MAIN W W
F7
FUSIBLE
LINK BLOCKEngine Room J/B
SECURITY ECU-B
D.C.C
3
12I
1 W - L5
BR
109 INSTRUMENT PANEL J/B ASSY
2A 451DP
EE J17
J/C
P11
IL1O2 Theft Warning ECU Assy T4
+B1
+B2
SH- 13
IF12
W 4
IC3L L
LG
IF3 17
B
2 IC3
T1
Theft Deterrent
Horn B - O
1
05-2028
- DIAGNOSTICSTHEFT DETERRENT SYSTEM
2218 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
THEFT DETERRENT HORN CIRCUIT
CIRCUIT DESCRIPTION
When the theft deterrent system is operating, the relay in the ECU turns on and off in a cycle of approximately
0.2 seconds, causing the theft warning horn to blow (see the wiring diagram below).
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK THEFT WARNING ECU ASSY (SECURITY)
(a) Remove the SECURITY fuse from the engine room J/B.
(b) Measure the resistance.
Standard: Below 1 W
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
05ITM-04