OBD port TOYOTA HIGHLANDER 2001 Service Repair Manual

'05 HIGHLANDER_U (L/O 0409)
412
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
25. IGN 10 A: Gauges and meters, SRS
airbag system, multiport fuel injection
system/sequential multiport fuel injec-
tion system, front passenger occupant
classification system
26. RAD NO.2 7.5 A: Audio system, shift
lock system, navigation system, rear
seat entertainment system, air condi-
tioning system, multiplex communica-
tion system
27. CIG 15 A: Cigarette lighter
28. P RR DOOR 20 A: Power windows
29. PWR OUTLET1 15 A: Power outlets
30. FR FOG 20 A: Front fog lights
31. ECU- IG 10 A: Electric moon roof,
anti- lock brake system, vehicle stability
control system, shift lock system,
charging system, starting system
32. WIPER 25 A: Windshield wipers and
washer
33. D RR DOOR 20 A: Power windows
34. D FR DOOR 25 A: Power windows,
door courtesy lights, power door lock
system
35. S/ROOF 20 A: Electric moon roof36. HEATER 10 A: Air conditioning system,
electric cooling fan, rear window defog-
ger, outside rear view mirror defogger,
gauges and meters
37. IG1 7.5 A: Back- up lights, vehicle sta-
bility control system, multiport fuel in-
jection system/sequential multiport fuel
injection system, outside rear view mir-
ror heaters, power door lock system,
wireless remote control system, naviga-
tion system, multiplex communication
system
38. RR WIP 15 A: Rear window wiper
39. STOP 20 A: Stop lights, high mounted
stoplight, anti- lock brake system, ve-
hicle stability control system, shift lock
system, trailer lights, multiplex commu-
nication system, multiport fuel injection
system/sequential multiport fuel injec-
tion system
40. OBD 7.5 A: On- board diagnosis sys-
tem
41. SEAT HTR 15 A: Seat heaters
42. IG2 15 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, charging system, starter sys-
tem
43. WASHER 20 A: Low windshield washer
fluid level warning light44. FR DEF 20 A: Air conditioning system,
outside rear view mirror defoggers
45. P FR DOOR 20 A: Power windows,
door courtesy lights, multiplex commu-
nication system
46. TAIL 10 A: Tail lights, license plate
lights, instrument panel lights, front fog
lights, front side marker lights, rear
side marker lights, parking lights
47. PANEL 7.5 A: Instrument panel lights,
trailer lights
48. DRL 7.5 A: Daytime running light sys-
tem
Fuses (type B)
49. AM2 30 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, starting system
50. ABS2 50 A: Anti- lock brake system,
vehicle stability control system
51. ABS1 30 A: Anti- lock brake system,
vehicle stability control system
52. HTR 50 A: Air conditioning system
53. RDI 30 A: Electric cooling fans
54. RR DEF 30 A: Rear window defoggers
55. CDS 30 A: Electric cooling fans

'05 HIGHLANDER_U (L/O 0409)
413
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
56. MAIN 40 A: H- LP RH LWRº, H- LP
LH LWRº, H- LP RH UPRº and H- LP
LH UPRº fuses
57. AM1 40 A: Multiport fuel injection sys-
tem/sequential multiport fuel injection
system, starting system
58. POWER 30 A: Power seat
Fuse (type C)
59. ALT 140 A: POWERº, STOPº, FR
DEFº, FR FOGº, OBDº, TAILº,
PANELº, S/ROOFº, D FR DOORº, P
FR DOORº, D RR DOORº, P RR
DOORº and PWR OUTLET1º fuses
60. RDI 50 A: No circuit

A67588
VSV is ON VSV is OFF
Air
Port E Port F Port E
Air
Port FAir
Filter
A54315
Air
Port EAir Filter(a)
A54316
Air
Port E
Port FBattery
(b)
05-662
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
852 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
Hand-held tester:
1 PERFORM ACTIVE TEST USING HAND-HELD TESTER (OPERATE VSV FOR IAC
VALVE NO. 2)
(a) Disconnect the vacuum hose.
(b) Connect the hand-held tester to the DLC3.
(c) Turn the ignition switch ON and push the hand-held tes-
ter main switch ON.
(d) Enter the following menus: DIAGNOSIS / ENHANCED
OBD II / ACTIVE TEST / INTAKE CTL VSV1. Operate the
VSV.
(e) Check the VSV operation when it is operated by the
hand-held tester.
OK:
Tester OperationSpecified Condition
VSV is ONAir from port E flows out through port F
VSV is OFFAir from port E flows out through the air filter
OK Go to step 4
NG
2 CHECK VSV FOR IAC VALVE NO.2 (OPERATION)
(a) Check that air flows from port E to the air filter.
(b) Apply battery positive voltage across the terminals.
(c) Check that air flows from port E to port F.
NG REPLACE VSV
OK

Y
A54315
A54316
A87791
Air
Port EAir Filter(a)
Air
Port E
Port FBattery
(b)
05-664
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)
854 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 CHECK VACUUM HOSES (INTAKE MANIFOLD - INTAKE AIR CONTROL VALVE,
INTAKE AIR CONTROL)
(a) Check that the vacuum hoses are:

Connected correctly.

Are not loose or disconnected.

Do not have cracks, holes or damage.
NG REPAIR OR REPLACE VACUUM HOSES
OK
5 INSPECT INTAKE AIR CONTROL VALVE (See page 13-2)
NG REPLACE INTAKE AIR CONTROL VALVE
OK
REPLACE ECM (See page 10-24)
OBD II scan tool (excluding hand-held tester):
1 INSPECT VSV FOR IAC VALVE NO.2 (OPERATION)
(a) Disconnect the VSV connector.
(b) Check operation of the VSV when battery positive voltage
is applied to the terminals of the VSV.
OK:
Battery positive voltage is not applied:
Air from port E flows out through the air filter.
Battery positive voltage is applied:
Air from port E flows out through port F.
NG REPLACE VSV
OK

A80089
AB B+
Power Transistor
Platinum Hot Wire
(Heater)
Output
Voltage
Temperature
Sensor
Platinum Hot Wire (Heater)
Temperature Sensor
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-81
271 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0100 MASS OR VOLUME AIR FLOW CIRCUIT
DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT
LOW INPUT
DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT
HIGH INPUT
CIRCUIT DESCRIPTION
The Mass Air Flow (MAF) meter measures the amount of air flowing through the throttle valve. The ECM uses
this information to determine the fuel injection time and provide a proper air fuel ratio. Inside the MAF meter,
there is a heated platinum wire exposed to the flow of intake air.
By applying a specific current to the wire, the ECM heats this wire to a given temperature. The flow of incom-
ing air cools the wire and an internal thermistor, changing their resistance. To maintain a constant current
value, the ECM varies the voltage applied to these components in the MAF meter. The voltage level is pro-
portional to the air flow through the sensor. The ECM interprets this voltage as the intake air amount.
The circuit is constructed so that the platinum hot wire and temperature sensor provide a bridge circuit, with
the power transistor controlled so that the potential of A and B remains equal to maintain the set temperature.
DTC No.DTC Detection ConditionTrouble Area
P0100When MAF meter circuit has an open or a short for more than
3 seconds
Open or short in MAF meter circuit

MAF meter

ECM
P0102When MAF meter circuit has an open for more than 3 seconds
Same as DTC No. P0100
P0103When MAF meter circuit has a short for more than 3 seconds
Same as DTC No. P0100
HINT:
After confirming DTC P0100, P0102 or P0103, use the hand-held tester or the OBD II scan tool to confirm
the MAF ratio from the ALL menu (to reach the ALL menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST
/ ALL).
Air Flow Value (g/s)Malfunction
Approximately 0.0
Open in MAF meter power source circuit

Open or short in VG circuit
271.0 or more
Open in EVG circuit
05ESV-05

05ITC-02
05-26
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
216 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
READINESS MONITOR DRIVE PATTERN
1. PURPOSE OF THE READINESS TESTS

The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emission-re-
lated components, and report any detected abnormalities with Diagnostic Trouble Codes (DTCs).
Since various components need to be monitored during different driving conditions, the OBD II system
runs separate monitoring programs called readiness monitors.

The hand-held tester's software must be version 9.0 or newer to view the readiness monitor status.
From the ºENHANCED OBD IIº menu, select ºMONITOR STATUSº to view the readiness monitor sta-
tus.

A generic OBD II scan tool can also be used to view the readiness monitor status.

When the readiness monitor status reads ºcompleteº, the necessary conditions have been met for run-
ning performance tests for that readiness monitor.
HINT:
Many state Inspection and Maintenance (I/M) programs require a vehicle's readiness monitor status to show
ºcompleteº.

The readiness monitor will be reset to ºincompleteº if:

The ECM has lost battery power or blown a fuse.

DTCs have been cleared.

The conditions for running the readiness monitor have not been met.

If the readiness monitor status shows ºincompleteº, follow the appropriate readiness monitor drive pat-
tern to change the status to ºcompleteº.
CAUTION:
Strictly observe posted speed limits, traffic laws, and road conditions when performing these drive
patterns.
NOTICE:
The following drive patterns are the fastest method of completing all the requirements necessary for
making the readiness monitor status read ºcompleteº.
If forced to momentarily stop a drive pattern due to traffic or other factors, the drive pattern can be
resumed. Upon completion of the drive pattern, in most cases, the readiness monitor status will
change to ºcompleteº.
Sudden changes in vehicle load and speed, such as driving up and down hills and/or sudden accel-
eration, hinder readiness monitor completion.

START
Confirm vehicle VIN
Preparation:
1. Connect hand-held tester to DLC3
2. Turn ignition switch to ON
3. Turn tester ON
Hand-held tester operation:
1. Select DIAGNOSIS
2. Select ENHANCED OBD ll
READ:
Menu Screen:
*********************************
[ VIN ]
*********************************
PRESS [EXIT]
ERROR
PRESS [EXIT] DTC P0630 was detected.
P0630 [VIN Not Programmed
or Mismatch - ECM/PCM]
Please input the VIN.
PRESS [EXIT] Possible cause:
To Menu Screen
17-digit VIN
displayed 3. Select VIN
DTC P0630 Set VIN Previously StoredVIN Not Stored
[EXIT] [EXIT][EXIT] 2. VIN WRITEVIN
Select VIN READ
1. VIN READ 1. VIN READ
ERROR
ECM does not respond the VIN.
1: VIN is not written yet.
2: Vehicle does not support this
function.
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-13
203 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3. READ VIN (Vehicle Identification Number)
(a) Read VIN using a hand-held tester.

- INTRODUCTIONTERMS
01-47
47 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U) HO2S
Heated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air Temperature
ICMIgnition Control Module-
IFIIndirect Fuel InjectionIndirect Injection (IDL)
IFSInertia Fuel-Shutoff-
ISCIdle Speed Control-
KSKnock SensorKnock Sensor
MAFMass AirflowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure Intake Vacuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Differential Pressure-
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Lamp
MSTManifold Surface Temperature-
MVZManifold Vacuum Zone-
NVRAMNon-V olatile Random Access Memory-
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn-Board DiagnosticOn-Board Diagnostic System (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Convert (OC), CCo
OLOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module-
PNPPark/Neutral Position-
PROMProgrammable Read Only Memory-
PSPPower Steering Pressure-
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module-
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger BypassE-ABV
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter-
SRIService Reminder Indicator-
SRTSystem Readiness Test-
STScan Tool-
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter