2001 TOYOTA HIGHLANDER warning

- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-787
977 Author
: Date
:
SymptomsSuspected AreasSee page
TRAC OFF indicator abnormal
1. Check the DTC again and make sure that the normal
code is output.
2. TRAC control switch circuit
3. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-859
DTC of VSC check cannot be done
1. Check the DTC again and make sure that the normal
code is output.
2. TC terminal circuit
3. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-868
VSC warning light abnormal Remain ON
1. Check the DTC again and make sure that the normal
code is output.
2. VSC warning circuit
3. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-847
VSC warning light abnormal Does not light up
1. Check the DTC again and make sure that the normal
code is output.
2. VSC warning circuit
3. If the symptoms still occur even after the above circuits
in suspected areas are inspected and proved to be
normal, replace the skid control ECU.05-765
05-851

7101E-06
- INSTRUMENT PANEL/METERCOMBINATION METER
71-1
3592 Author
: Date
:
COMBINATION METER
PROBLEM SYMPTOMS TABLE
Warning Lights:
SymptomSuspect AreaSee page
Check Engine warning light does not come on.
7. ECM
8. Wire Harness or Connector
9. Combination Meter Assy05-5
05-366
-
71-18
Discharge warning light does not come on.
1. ECM
2. Wire Harness or Connector
3. Combination Meter Assy05-5
05-366
-
71-18
Brake warning light does not come on.
1. Skid control ECU
2. Wire Harness or Connector
3. Combination Meter Assy05-761
-
71-18
ABS warning light does not come on.
1. ABS ECU
2. Wire Harness or Connector
3. Combination Meter Assy05-761
-
71-18
SRS warning light does not come on.
1. Airbag Sensor Assy Center
2. Wire Harness or Connector
3. Combination Meter Assy05-1200
-
71-18
Open Door warning light does not come on.
1. Refer to troubleshooting
2. Wire Harness or Connector
3. Combination Meter Assy05-1601
-
71-18
Fuel Level warning light does not come on.
1. Refer to troubleshooting
2. Wire Harness or Connector
3. Combination Meter Assy05-1893
-
71-18
Low Oil Pressure warning light does not come on.
1. Low Oil Pressure Warning Switch
2. Wire Harness or Connector
3. Combination Meter Assy71-3
-
71-18
Driver's seat belt warning light does not come on.
1. Refer to troubleshooting
2. Wire Harness or Connector
3. Combination Meter Assy05-1898
-
71-18
ºOIL LEVELº warning light does not come on.
1. Low Oil Level Sensor
2. Wire Harness or Connector
3. ECM
4. Combination Meter Assy05-5
05-366
-
05-5
05-366
71-18
ºTIRE AIR PRESSº warning light does not come on.
1. Wire Harness or Connector
2. Skid Control ECU
3. Combination Meter Assy-
05-761
71-18
Indicator Lights:
SymptomSuspect AreaSee page
Turn indicator light does not come on.
1. Turn Signal and Hazard Warning System
2. Wire Harness or Connector
3. Combination Meter Assy05-1533
-
71-18
High Beam indicator light does not come on.
1. Headlight Dimmer Switch
2. Wire Harness or Connector
3. Combination Meter Assy05-1533
-
71-18
Washer level indicator light does not come on.
1. Washer Level Warning Switch
2. Wire Harness or Connector
3. Combination Meter Assy-
-
71-18

F46317
Instrument Panel J/BSkid Control ECU
with Actuator
F7
FL Block I15
Ignition SWPassenger Side J/B
4
1
FL MAIN IG1
Battery 4JS27BZ
630
B 1C 1DV8
VSC Warning
Buzzer ECU-IG
W8
1A AM1
W
2 710
ALT4M
1 AM1G
1C
2
11 2
BR-WIC420
Y G
4 2O
05-866
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1056 Author
: Date
:
SKID CONTROL BUZZER CIRCUIT
CIRCUIT DESCRIPTION
The skid control buzzer sounds and Slip Indicator blinking during VSC operation.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand-held tester and start from step 2 when not using the
hand-held tester.
1 PERFORM ACTIVE TEST BY HAND-HELD TESTER(SKID CONTROL BUZZER)
(a) Connect the hand-held tester to the DLC3.
(b) Start the engine.
(c) Select the item ºVSC/BR WARN BUZº in the ACTIVE TEST and operate the skid control buzzer on
the hand-held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
VSC / BR WARN BUZTurns VSC / BRAKE warning buzzer ON / OFFBuzzer can be heard
(d) Check that skid control buzzer sounds by operating with the hand-held tester.
OK:
The skid control buzzer sounds in accordance with operation of the hand-held tester.
NG Go to step 2
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)
05CDL-18

2005 HIGHLANDER (EWD592U)
60
H SYSTEM CIRCUITS
2005 HIGHLANDER
ELECTRICAL WIRING DIAGRAM
SYSTEM CIRCUITS
Page
Air Conditioning (Automatic A/C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
298
Air Conditioning (Manual A/C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
Audio System (6 Speaker) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280
Audio System (8 Speaker) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Automatic Glare-Resistant EC Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Automatic Light Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Back-Up Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
Combination Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Cruise Control (2AZ-FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Cruise Control (3MZ-FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Electronically Controlled Transmission and A/T Indicator (2AZ-FE) . . . . . . 110
Electronically Controlled Transmission and A/T Indicator (3MZ-FE) . . . . . . 102
Engine Control (2AZ-FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Engine Control (3MZ-FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Engine Immobilizer System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Front Deicer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Front Fog Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Front Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Headlight (w/ Daytime Running Light) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Headlight (w/o Daytime Running Light) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Interior Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Key Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Light Auto Turn Off System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Mirror Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Moon Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Multiplex Communication System (BEAN Bus) . . . . . . . . . . . . . . . . . . . . . . . . . 258
Multiplex Communication System (CAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
Navigation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Power Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Power Seat (Driver's Seat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Power Seat (Front Passenger's Seat) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Power Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Radiator Fan and Condenser Fan (2AZ-FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294
Radiator Fan and Condenser Fan (3MZ-FE) . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Rear Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312
Rear Window Defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Rear Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Remote Control Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Seat Belt Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226

2005 HIGHLANDER (EWD592U)
61
H
Page
Seat Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
256
Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
SRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Stop Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Taillight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Theft Deterrent System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Tire Pressure Warning System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Trailer Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Turn Signal and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
VSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Wireless Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-785
975 Author
: Date
:
PKB (S27-28) - GND1RW WBParking brake switch in-
IG switch ON, parking brake switch
ONBelow 1.5 VPKB (S27 28) GND1
(S27-32)R-W - W-BParking brake switch in
putIG switch ON, parking brake switch
OFF10 to 14 V
WA (S27-29) - GND1RL WBABS ilihttt
IG switch ON, ABS warning light
ON6 to 11 VWA (S27 29) GND1
(S27-32)R-L - W-BABS warning light outputIG switch ON, ABS warning light
OFFBelow 2.0 V
IG switch ON, VSC buzzer soundsBelow 1.0 e 10 to 14 V
BZ (S27-30) - GND1 (S27-32)BR-W - W-BBuzzer outputIG switch ON, VSC buzzer does not
sound10 to 14 V
VSCW (S27-36) - GND1
(S27-32)L-Y - W-BVSC warning light outputIG switch ON, VSC warning light
ONBelow 2.0 V
CSW* (S27-43) - GND1
(S27-32)L-R - W-BTRAC OFF switch inputTRAC OFF switch OFF10 to 14 V
BRL (S27-44) - GND1LG B W BBk ilihttt
IG switch ON, BRAKE warning light
ON6 to 11 VBRL (S27 44) GND1
(S27-32)LG-B - W-BBrake warning light outputIG switch ON, BRAKE warning light
OFFBelow 2.0 V
R+ (S27-45) - GND1 (S27-32)B-O - W-BPower supply for motor
relayIG switch ON10 to 14 V
IG1 (S27-46) - GND1
(S27-32)B-R - W-BIG1 power supplyIG switch ON10 to 14 V
*: 2WD only

05IOX-02
F45156
S27
F45157
GND 05-742
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
932 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TERMINALS OF ECU
SKID CONTROL ECU:
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
TRC+ (8) - TRC- (22)G-B - Y-BECM communication out-
putIgnition switch ONPulse generation
ENG+ (9) - GND1 (32)W-L - W-BECM serial communica-
tion line (+) input signalIgnition switch ON and vehicle
speed 30 km/h (19 mph) or morePulse generation
(See wave form 1)
D/G (13) - GND1 (32)GR-B - W-BDiagnosis tester commu-
nication lineIgnition switch ON10 to 14 V
ENG- (23) - GND1 (32)W-G - W-BECM serial communica-
tion line (-) input signalIgnition switch ON and engine idle
speedPulse generation
(See wave form 2)
STP (27) - GND1 (32)G-Y - W-BStop lamp switch assy in-
put signalBrake pedal depressed10 to 14 V
STP (27) - GND1 (32)G-Y - W-BStop lamp switch assy in-
put signalBrake pedal releasedBelow 1.5 V
GND1 (32) - Body groundW-B -
Body groundGroundAlwaysBelow 1 W
INIT (41) - GND1 (32)B-Y - W-BTire pressure warning re-
set switch signalIgnition switch ON and tire pressure
warning reset switch ONBelow 3 V
INIT (41) - GND1 (32)B-Y - W-BTire pressure warning re-
set switch signalIgnition switch ON and tire pressure
warning reset switch OFF10 to 14 V
Wave form 1:
Reference
ItemCondition
TerminalENG+ - GND1
Tool setting1 V / DIV, 0.5 ms / DIV
Vehicle conditionEngine idle speed

F45158
GND
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
05-743
933 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
Wave form 2:
Reference
ItemCondition
TerminalENG- - GND1
Tool setting1 V / DIV, 0.5 ms / DIV
Vehicle conditionEngine idle speed