2001 TOYOTA HIGHLANDER warning light

05-778
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
968 Author
: Date
:
HINT:
If the VSC warning light does not blink, perform the zero point calibration again.
(g) Turn the ignition switch off.

05CD2-13
05-786
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
976 Author
: Date
:
PROBLEM SYMPTOMS TABLE
If there are no DTCs output but the problem still occurs, check the circuits for each problem symptom in the
order given in the table below and proceed to the relevant troubleshooting page.
NOTICE:
When replacing the skid control ECU, sensor, etc., turn the ignition switch off.
SymptomsSuspected AreasSee page
ABS does not operate
BA does not operate
EBD does not operate
1. Check the DTC again and make sure that the normal
code is output.
2. IG power source circuit and ground circuit.
3. Speed sensor circuit
4. Check the ABS & TRAC actuator with a hand-held tes-
ter.
If abnormal, check the hydraulic circuit for leakage.
5. 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
05-827
05-788
05-795
32-36
ABS does not operate efficiently
BA does not operate efficiently
EBD does not operate efficiently
1. Check the DTC again and make sure that the normal
code is output.
2. Speed sensor circuit
3. Stop lamp switch circuit
4. Check the ABS & TRAC actuator with a hand-held tes-
ter.
If abnormal, check the hydraulic circuit for leakage.
5. 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
05-788
05-795
32-36
ABS warning light abnormal Remain ON1. ABS warning light circuit
2. Skid control ECU05-840
-
ABS warning light abnormal Does not light up1. ABS warning light circuit
2. Skid control ECU05-844
-
DTC of ABS 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
Sensor signal check cannot be done1. TS terminal circuit
2. Skid control ECU05-873
-
VSC and/or TRAC does not operate
1. Check the DTC again and make sure that the normal
code is output.
2. IG power source circuit and ground circuit.
3. Check the hydraulic circuit for leakage.
4. Speed sensor circuit
5. Deceleration sensor circuit
6. Yaw rate sensor circuit
7. Steering sensor circuit
8. 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
05-827
-
05-788
05-795
05-815
05-824
05-824
05-821
SLIP indicator light abnormal1. SLIP indicator light circuit
2. Skid control ECU05-863
-

- 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

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

F46303
Combination MeterSkid Control ECU with Actuator
Instrument Panel J/BI15
Ignition SW
F7
FL BlockECU-IG
IGN
AM1
ALT
AM2VSC
IG1 AM1VSCW
IG1
FL MAIN
BatteryIG2 AM2 IF3IC2
S27
IL1
S27 IC4 C11
J6
J/C Passenger Side J/B
IC1 C12
4E
4H 4J 4M
1A1C
1D
1C
1C 1G 1
2 45
6 7
1013 1636
9
4
11 7
6
642
746
10
1 12
10 PV
L-Y
SB
PP
WYEE
GR B-R
G
GR
W
Y B W
L-Y12
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-847
1037 Author
: Date
:
VSC WARNING LIGHT CIRCUIT (REMAINS ON)
CIRCUIT DESCRIPTION
If the ECU stores DTC, the VSC warning light comes on in the combination meter.
WIRING DIAGRAM
05CDH-1 1