TOYOTA HIGHLANDER 2001 Service Repair Manual

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

I37211
R29
R31
ACC
GND
+B1
SELD
05-1642
- DIAGNOSTICSAUDIO SYSTEM
1832 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 INSPECT MULTI-DISPLA Y CONTROLLER SUB-ASSY(+B1, ACC, GND, SELD)
(a) Disconnect the connectors from the multi-display control-
ler sub-assy.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
GND - Body groundAlwaysBelow 1 W
SELD - Body groundAlwaysBelow 1 W
(c) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
+B1 - GNDAlways10 - 14 V
ACC - GNDIgnition SW ACC10 - 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE PAGE
05-1632)

I34945
Multi-display
Controller Sub-assy R28
Television Display Assy
ACC
GND1
2
6G
GR
W-B1
6 2V
GR
6 2 1
+B2
ACC2
GND1 +B
W-B BK1
R30
R30
R30 BK1
BK1
- DIAGNOSTICSREAR SEAT ENTERTAINMENT SYSTEM
05-1717
1907 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
POWER SOURCE CIRCUIT(TELEVISION DISPLAY ASSY)
CIRCUIT DESCRIPTION
This circuit is the power source circuit to operate the television display assy. The power source is sent from
the battery to the television display assy through the multi-display controller sub-assy.
WIRING DIAGRAM
05CF1-03

I37212ACC+B
GND
R28
Television Display Assy:
05-1718
- DIAGNOSTICSREAR SEAT ENTERTAINMENT SYSTEM
1908 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 INSPECT TELEVISION DISPLAY ASSY(+B, ACC, GND)
(a) Disconnect the connector from the television display
assy.
(b) Measure the resistance according to the value in the table
below.
Standard:
Tester connectionConditionSpecified condition
GND - Body groundAlwaysBelow 1 W
(c) Measure the voltage according to the values in the table
below.
Standard:
Tester connectionConditionSpecified condition
+B - GNDAlways10 to 14 V
ACC - GNDIgnition SW ACC10 to 14 V
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See page
05-1704)

I37212ACC+B
GND
R28
Television Display Assy:
I35960I36913
R30
ACC2+B2
GND1
Multi-display Controller Sub-assy:
- DIAGNOSTICSREAR SEAT ENTERTAINMENT SYSTEM
05-1719
1909 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK HARNESS AND CONNECTOR(TELEVISION DISPLAY ASSY -
MULTI-DISPLA Y CONTROLLER SUB-ASSY)
(a) Disconnect the connector from the multi-display control-
ler sub-assy.
(b) Measure the resistance according to the values in the
table below.
Standard:
Tester connectionConditionSpecified condition
+B - +B2AlwaysBelow 1 W
ACC - ACC2AlwaysBelow 1 W
GND - GND1AlwaysBelow 1 W
+B - Body groundAlways10 kW or higher
ACC - Body groundAlways10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(See page 05-1704)

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.

H45941
Airbag Sensor
Assy Center
A175
E1 E2
27IG2
1
Battery28 7IGN Instrument Panel J/B
IG2
6 YAM2
GR
1LB
A17
A17 1C
IAW-B
W-B W-B14
9
1L 1L
1D L-Y 1
IC1
FL MAINW F7 FL Block
WI15
Ignition SW
Instrument Panel J/BAM2
10
1 16
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1515
1705 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SOURCE VOLTAGE DROP
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage-increase circuit (DC-DC converter) in the airbag sensor assy center
in case the source voltage drops.
When the battery voltage drops, the voltage-increase circuit (DC-DC converter) functions to increase the
voltage of the SRS to normal voltage.
A malfunction in this circuit is displayed differently from other codes. The source voltage drop is indicated
when the SRS warning light comes on without showing any DTCs.
A malfunction in this circuit is not recorded in the airbag sensor assy center. The SRS warning light automati-
cally goes off when the source voltage returns to normal.
DTC No.Diagnosis
(Normal)Source voltage drop
WIRING DIAGRAM
05267-05

H40065
A17 IG2
E2
E1
05-1516
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1706 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK SOURCE VOLTAGE
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait for at least 90 seconds.
(c) Disconnect the connector of the airbag sensor assy cen-
ter.
(d) Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
(f) Measure the voltage and resistance according to the val-
ue(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
A17-5 (IG2) -
Body groundIgnition switch ON10 to 14 V
A17-27 (E1) -
Body groundAlwaysBelow 1 W
A17-28 (E2) -
Body groundAlwaysBelow 1 W
NG REPAIR OR REPLACE WIRE HARNESS
(BATTERY - AIRBAG SENSOR ASSY CENTER),
CHARGING SYSTEM AND BATTERY
OK
2 CHECK SRS WARNING LIGHT
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Connect the airbag sensor assy center connectors.
(d) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(e) Turn the ignition switch to the ON position.
(f) Operate all components of the electrical system (defogger, wiper, headlight, heater blower, etc.) and
check the SRS warning light operation.
OK:
SRS warning light does not come on.
NG REPLACE AIR BAG SENSOR ASSY CENTER
(SEE PAGE 60-53)
OK
END

- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1517
1707 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SRS WARNING LIGHT CIRCUIT MALFUNCTION (ALWAYS LIGHT
UP, WHEN DTC IS NOT OUTPUT.)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from the LOCK position to ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and CG of the DLC3 are connected, the DTC is displayed by blinking the SRS warning
light.
05IX2-02