Page 2042 of 2572
I38147
I38148
- DIAGNOSTICSNAVIGATION SYSTEM
05-1777
1967 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(9) When the vehicle runs on the snowy road or a
mountain path with the chains installed or using a
spare tire, the current vehicle position mark may
deviate from the correct position.
(10) When a tire is changed, the current vehicle position
mark may deviate from the correct position.
HINT:
Diameter of the tire may change, causing a speed sensor
error.
Performing the ºtire changeº in calibration mode will allow
the system to correct the current vehicle position faster.
Page 2048 of 2572
05EYW-02
F46771
Skid
Control
ECUTire Pressure Warning
Reset Switch
ECM
Right Front Speed Sensor
Stop Lamp Switch Assy
Combination Meter Assy
(Tire Pressure Warning Lamp)Ambient Temperature
Sensor
Left Front Speed Sensor
Right Rear Speed Sensor
Left Rear Speed Sensor 05-732
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
922 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SYSTEM DIAGRAM
Page 2052 of 2572
05-1522
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1712 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TC TERMINAL CIRCUIT
CIRCUIT DESCRIPTION
The DTCs output mode is set by connecting terminals TC and CG of the DLC3.
The DTCs are displayed by blinking the SRS warning light.
HINT:
Make sure that DTC B1281 has not been output. If DTC B1281 has been output, refer to the multiplex
communication system.
When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an
internal ground short in each ECU is suspected.
The DTC output mode signal is transmitted through BEAN to each ECU including the airbag sensor
assy center, except for the skid control ECU with actuator. Thus when all systems except the ABS sys-
tem do not enter DTC output mode, it can be suspected that there is an ECM malfunction.
0526A-05
Page 2053 of 2572
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
Page 2054 of 2572
H40173
A67445H40173
A67445H44085
DLC3:
TC
ECM:
TC
E5
H40173
DLC3
CG
05-1524
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1714 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK WIRE HARNESS(DLC3 - ECM)
(a) Turn the ignition switch to the LOCK position.
(b) Disconnect the airbag sensor assy center connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
DLC3 (TC) -
E5-20 (TC)AlwaysBelow 1 W
NG REPAIR OR REPLACE WIRE HARNESS(TC of
DLC3 - TC of ECM)
OK
2 CHECK WIRE HARNESS(CG of DLC3 - BODY GROUND)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
DLC3 (CG) -
Body groundAlwaysBelow 1 W
NG REPAIR OR REPLACE WIRE HARNESS(CG of
DLC3 - BODY GROUND)
OK
Page 2055 of 2572
A67445
ECM:
TC
E5
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
05-1525
1715 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK WIRE HARNESS(TC of ECM - BODY GROUND)
(a) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
E5-20 (TC) -
Body groundAlways1MW or Higher
NG REPAIR OR REPLACE WIRE HARNESS AND
EACH ECU
OK
4 REPLACE ECM
(a) Check that the ECM.
Result:
A: Normal system code is output.
B: DTC is output.
C: ECM does not set the DTC output mode.
A END
B GO TO INSPECTION PROCEDURE OF DTC
OUTPUT
C
REPLACE AIRBAG SENSOR ASSY CENTER (SEE PAGE 60-53)
Page 2062 of 2572
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
05-751
941 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
ABS SYSTEM MALFUNCTION
CIRCUIT DESCRIPTION
The skid control ECU outputs DTCs when a speed sensor malfunction occurs or there is an open in the stop
lamp switch assy circuit of the ABS system. If ABS system has a malfunction, tire pressure warning system
will not function.
INSPECTION PROCEDURE
1 CHECK DIAGNOSTIC TROUBLE CODE OUTPUT
(a) Check that the normal code is output by ABS system (see page 05-765).
OK:
DTC is not output.
NG REPAIR CIRCUIT INDICATED BY OUTPUT
CODE
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-740)
05EZ4-02
Page 2070 of 2572
05ESJ-05
05-2
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
192 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
PART AND SYSTEM NAME LIST
This reference list indicates the part names used in this manual along with their definitions.
TOYOTA/LEXUS nameDefinition
Toyota HCAC system, Hydro-carbon Adsorptive Catalyst
(HCAC) system, HC adsorptive three-way catalystHC adsorptive three-way catalytic converter
Variable valve timing sensor, VVT sensorCamshaft position sensor
Variable valve timing system, VVT systemCamshaft timing control system
Camshaft timing oil control valve, Oil control valve, OCV,
VVT, VSVCamshaft timing oil control valve
Variable timing and lift, VVTLCamshaft timing and lift control
Crankshaft position sensor ºAºCrankshaft position sensor
Engine speed sensorCrankshaft position sensor
THAIntake air temperature
Knock control moduleEngine knock control module
Knock sensorEngine knock sensor
Mass or volume air flow circuitMass air flow meter circuit
Vacuum sensorManifold air pressure sensor
Internal control module, Control module, Engine control
ECU, PCMPower train control module
FC idleDeceleration fuel cut
Idle air control valveIdle speed control
CCV, Canister close valve VSV for canister controlEvaporative emissions canister vent valve
EVAP VSV, Vacuum switching valve assembly No. 1, EVAP
VSV, Purge VSVEvaporative emissions canister purge valve
VSV for pressure switching valve, Bypass VSVEvaporative emission pressure switching valve
Vapor pressure sensor, EVAP pressure sensor, Evaporative
emission control system pressure sensorFuel tank pressure sensor
Charcoal canisterEvaporative emissions canister
ORVR systemOn-board refueling vapor recovery system
Intake manifold runner controlIntake manifold tuning system
Intake manifold runner valve, IMRV, IACV (runner valve)Intake manifold tuning valve
Intake control VSVIntake manifold tuning solenoid valve
AFSAir fuel ratio sensor
O2 sensorHeater oxygen sensor
Oxygen sensor pumping current circuitOxygen sensor output signal
Oxygen sensor reference ground circuitOxygen sensor signal ground
Accel position sensorAccelerator pedal position sensor
Throttle actuator control motor, Actuator control motor, Elec-
tronic throttle motor, Throttle control motorElectronic throttle actuator
Electronic throttle control system, Throttle actuator control
systemElectronic throttle control system
Throttle/pedal position sensor, Throttle/pedal position switch,
Throttle position sensor/switchThrottle position sensor
Turbo press sensorTurbocharger pressure sensor
Turbo VSVTurbocharger pressure control solenoid valve
P/S pressure switchPower-steering pressure switch
VSV for ACMActive control engine mount
Speed sensor, Vehicle speed sensor ºAº, Speed sensor for
skid control ECUVehicle speed sensor
ATF temperature sensor, Trans. fluid temp. sensor, ATF
temperature sensor ºAºTransmission fluid temperature sensor
Electronic controlled automatic transmission, ECTElectronically controlled automatic
Intermediate shaft speed sensor ºAºCounter gear speed sensor
