check engine light TOYOTA HIGHLANDER 2001 Service Owner's Manual

'05 HIGHLANDER_U (L/O 0409)
397
2005 HIGHLANDER from Nov. '04 Prod. (OM48570U)
NOTICE

Be sure the engine and all accesso-
ries are off before performing main-
tenance.

When checking the battery, remove
the ground cable from the negative
terminal (- º mark) first and rein-
stall it last.

Be careful not to cause a short cir-
cuit with tools.

Take care no solution gets into the
battery when washing it.
If the battery is disconnected or run
down, the moon roof may not operate
automatically and the jam protection func-
tion will not function correctly after you
reconnect, replace or recharge the battery.
In any of these cases, you should normal-
ize the moon roof. To normalize the moon
roof, see Electric moon roofº on page 36
in Section 1- 2.
Ty p e A
Green DarkClear or
light yellow
Ty p e B
Blue White Red
CHECKING BY INDICATOR
Check the battery condition by the indi-
cator color.
Indicator color
ConditionTy p e ATy p e BCondition
GreenBlueGood
DarkWhite
Charging necessary.
Have battery
checked by your
Toyota dealer.
Clear or
light
yellow
RedHave battery
checked by your
Toyota dealer.
During recharging, the battery is pro-
ducing hydrogen gas.
Therefore, before recharging:
1. If recharging with the battery installed
on the vehicle, be sure to disconnect
the ground cable.
2. Be sure the power switch on the re-
charger is off when connecting the
charger cables to the battery and when
disconnecting them.
CAUTION

Always charge the battery in an un-
confined area. Do not charge the
battery in a garage or closed room
where there is not sufficient ventila-
tion.

Only do a slow charge (5 A or
less). Charging at a quicker rate is
dangerous. The battery may ex-
plode, causing personal injuries.
NOTICE
Never recharge the battery while the
engine is running. Also, be sure all
accessories are turned off.
ÐChecking battery condition Battery recharging precautions

G24767
Skid Control ECU
(harness side connector)
S27
BRL
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-855
1045 Author
: Date
:
INSPECTION PROCEDURE
HINT:
When releasing the parking brake, set the chocks to hold the vehicle for safety.
1 CHECK BRAKE FLUID
(a) Release the parking brake pedal.
(b) Check that the brake fluid level is proper.
NG ADD BRAKE FLUID
OK
2 CHECK DTC FOR ABS
(a) Are the DTC recorded? (see page 05-765)
NO Go to step 3
YES
REPAIR CIRCUIT INDICATED BY OUTPUT CODE
3 INSPECT BRAKE WARNING LIGHT
WHEN USING HAND-HELD TESTER:
(a) Connect the hand-held tester to the DLC3.
(b) Start the engine.
(c) Select the item ºBRAKE WARN LIGHTº in the ACTIVE TEST and operate the BRAKE warning light
on the hand-held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
BRAKE WRN LIGHTTurns BRAKE warning light ON / OFFObserve combination me-
ter
(d) Check that ºONº and ºOFFº of the BRAKE warning light are indicated on the combination meter when
using the hand-held tester.
OK:
Turn the BRAKE warning light on or off in accordance with the hand-held tester.
WHEN NOT USING HAND-HELD TESTER:
(a) Turn the ignition switch off and disconnect the connector
from the skid control ECU.
(b) Ground terminal BRL of the skid control ECU.
(c) Turn the ignition switch to the ON position.
(d) Check that the brake warning light.
OK:
Turn the light on or off in accordance with the connec-
tion of terminal BRL and body ground.
NG Go to step 4
OK
REPLACE ABS & TRACTION ACTUATOR ASSY (SEE PAGE 32-37)

G24767
Skid Control ECU
(harness side connector)
S27
WA
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-845
1035 Author
: Date
:
INSPECTION PROCEDURE
1 INSPECT ABS WARNING LIGHT
WHEN USING HAND-HELD TESTER:
(a) Connect the hand-held tester to the DLC3 and start the engine.
(b) Select the item ºABS WARN LIGHTº in the ACTIVE TEST and operate the ABS warning light on the
hand-held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
ABS WARN LIGHTTurns ABS warning light ON / OFFObserve combination me-
ter
(c) Check that ºONº and ºOFFº of the ABS warning light can be shown on the combination meter by the
hand-held tester.
OK:
Turn the ABS warning light ON or OFF in accordance with the hand-held tester.
WHEN NOT USING HAND-HELD TESTER:
(a) Turn the ignition switch off and disconnect the connector
from the skid control ECU.
(b) Ground terminal WA of the skid control ECU.
(c) Turn the ignition switch to the ON position.
(d) Check that the ABS warning light.
OK:
Turn the light ON or OFF in accordance with the con-
necting condition of terminal WA and body ground.
NG CHECK AND REPAIR ABS WARNING LIGHT
CIRCUIT
OK

E72985
Engine Room J/B
Connector Front View:
2I
2I-1
- DIAGNOSTICSLIGHTING SYSTEM
05-1569
1759 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK HARNESS AND CONNECTOR(POWER SOURCE CIRCUIT)
(a) Disconnect the 2I connector from the engine room J/B.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2I-1 - Body groundAlways10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ENGINE ROOM J/B

E72985
Engine Room J/B
Connector Front View:
2I
2I-1
- DIAGNOSTICSLIGHTING SYSTEM
05-1573
1763 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 CHECK HARNESS AND CONNECTOR(POWER SOURCE CIRCUIT)
(a) Disconnect the 2I connector from the engine room J/B.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
2I-1 - Body groundAlways10 to 14 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ENGINE ROOM J/B

E74382
ECM
Connector Front View:
E9
E9-21
- DIAGNOSTICSLIGHTING SYSTEM
05-1597
1787 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
1 CHECK ECM
(a) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester connectionConditionSpecified condition
E9-21 - Body groundEngine running10 to 14 V
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)
2 INSPECT GENERATOR ASSY
(a) Inspect generator assy (see page 19-17 or 19-42).
NG CHECK AND REPLACE GENERATOR ASSY
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR (GENERATOR ASSY - ECM)

05ISA-02
I40190
I38204
I38205
05-1784
- DIAGNOSTICSNAVIGATION SYSTEM
1974 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DIAGNOSTIC START-UP/FINISH
HINT:

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.

After the ignition switch is turned on, check that the map is displayed before starting the diagnostic
mode. Otherwise, some items cannot be checked.
1. There are 2 methods to start diagnostic mode. Start the mode by using one of them.
2. Method 1
(a) Start the engine.
(b) While pressing and holding ºINFOº switch, operate light
control switch, OFF " TAIL " OFF " TAIL " OFF "
TAIL " OFF.
(c) The diagnostic mode starts and the service check screen
(ºSystem Check Modeº) will be displayed. Service inspec-
tion starts automatically and the result will be displayed.
3. Method 2
(a) Start the engine.
(b) Switch to the ºDisplay Checkº screen.
(c) From the display adjustment screen, touch the corners of
the screen in the following order: upper left " lower left
"upper left " lower left " upper left " lower left.
(d) The diagnostic mode starts and ºService Checkº screen
will be displayed. Service inspection starts automatically
and the result will be displayed.
4. Diagnosis MENU
(a) Diagnostic screen will be displayed by pressing the menu
switch on the service check screen.

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)(From August, 2004)
05-45
235 Author
: Date
:
Hand-held Tester DisplayDiagnostic Note Normal Condition* Measurement Item/Range
(Display)
AF FT B1 S1
Short term fuel trim associated with bank
1, sensor 1/
Minimum: 0, Maximum: 1.999

Value less than 1 (0.000 to
0.999) = LEAN

Stoichiometric Air-Fuel Ratio=1

Value greater than 1 (1.001 to
1.999) = RICH
-
FUEL SYS #1
Fuel system status (Bank 1) /
OL or CL or OL DRIVE or
OL FAULT or CL FAULT
Idling after warming up: CL

OL (Open Loop) : Has not yet sa-
tisfied conditions to go closed
loop

CL (Closed Loop) : Using heated
oxygen sensor(s) as feed back
for fuel control

OL DRIVE: Open loop due to
driving conditions (fuel enrich-
ment)

OL FAULT: Open loop due to de-
tected system fault

CL FAULT: Closed loop but one
of heated oxygen sensors, which
is used for fuel control, is mal-
functioning
FC IDLIdle fuel cut/ ON or OFFFuel cut operation: ON
FC IDL = ON when throttle valve
is fully closed and engine speed is
over 1,500 rpm
MILMIL status/ ON or OFFMIL ON: ON-
STARTER SIGStarter signal/ ON or OFFCranking: ON-
A/C SIGA/C signal/ ON or OFFA/C ON: ON-
PNP SW [NSW]PNP switch signal/ ON or OFFP or N position: ON-
ELECT LOAD SIGElectrical load signal/ ON or OFFDefogger switch ON: ON-
STOP LIGHT SWStop lamp switch/ ON or OFF
Brake pedal depressed: ON

Brake pedal released: OFF-
PS OIL PRESS SWPower steering signal/ ON or OFF

While turning steering wheel: ON

While not turning steering wheel:
OFFIdle-up control is performed when
PS is ON
PS SIGNALPower steering signal/
ON or OFFWhen steering wheel is turnedThis signal is usually ON until Igni-
tion switch is turned OFF
FUEL PUMP / SPDFuel pump / speed status /
ON/H or OFF/M,LIdling: ON-
A/C MAG CLUTCHA/C magnet clutch status /
ON or OFFA/C magnet clutch ON: ON-
EVAP VSVEVAP VSV status control /
ON or OFFVSV operating: ONEVAP VSV is controlled by ECM
(ground side duty control)
VVT CTRL B1VVT control status (Bank 1) /
ON or OFFVVT system operation: ON-
IGNITIONIgnition counter/ Minimum: 0,
Maximum: 4000 to 400-
CYL #1, #2, #3, #4Misfire ratio of cylinder 1 to 4/
Minimum: 0 %, Maximum: 50 %0 %This item is displayed in only idling
MISFIRE LOADEngine load for first misfire range/
Minimum: 0 g/rev, Maximum: 3.98 g/rev.Misfire 0: 0 g/rev.'
MISFIRE RPMEngine RPM for first misfire range/
Minimum: 0 rpm, Maximum: 6,375 rpmMisfire 0: 0 rpm'
FC TAUFuel Cut TAU: Fuel cut during very light
load/ ON or OFFFuel cut operating: ON
Fuel cut is being performed under
very light load to prevent engine
combustion from becoming incom-
plete
CHECK MODECheck mode/ ON or OFFCheck mode ON: ONSee page 05-40

05-410
- DIAGNOSTICSSFI SYSTEM (3MZ-FE)(From August, 2004)
600 Author
: Date
:
Hand-held Tester DisplayDiagnostic Note Normal Condition * Measurement Item/Range
(Display)
EVAP VSVVSV status for EVAP control/
ON or OFFVSV operating: ONEVAP VSV is controlled by the
ECM (ground side duty control)
BOOST PRESS VSV
VSV status for boost pressure
control/
ON or OFF
VSV operating: ON'
IGNITIONIgnition counter/ Minimum: 0, Max-
imum: 6000 to 600'
CYL #1, #2, #3, #4, #5, #6Misfire ratio of cylinder 1 to 6/
Minimum: 0 %, Maximum: 50 %0 %This item is displayed in only idling
MISFIRE LOAD
Engine load for first misfire range/
Minimum: 0 g/rev, Maximum: 3.98
g/rev.
Misfire 0: 0 g/rev.'
MISFIRE RPM
Engine RPM for first misfire range/
Minimum: 0 rpm, Maximum: 6,375
rpm
Misfire 0: 0 rpm'
FC TAUFuel Cut TAU: Fuel cut during very
light load/ ON or OFFFuel cut operating: ON
Fuel cut is being performed under
very light load to prevent engine
combustion from becoming incom-
plete
CHECK MODECheck mode/ ON or OFFCheck mode ON: ONSee step 3
HINT:
*: If no conditions are specifically stated for ºldlingº, the shift lever is in the N or P position, the A/C switch
is OFF and all accessory switches are OFF.
2. ACTIVE TEST
HINT:
Performing the hand-held tester ACTIVE TEST allows relay, VSV, actuator and other items to be operated
without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to shorten
labor time. The DATA LIST can be displayed during the ACTIVE TEST.
(a) Warm up the engine.
(b) Turn the ignition switch OFF.
(c) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(d) Turn the ignition switch ON.
(e) Turn ON the hand-held tester or the OBD II scan tool.
(f) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
(g) According to the display on tester, perform the ºACTIVE TESTº.
Hand-held Tester DisplayTest DetailsDiagnostic Note
INJ VOL
[Test Details]
Control injection volume
Minimum: -12.5 %, Maximum: 25 %
[Vehicle Condition]
Engine speed: 3,000 rpm or less
All injectors are tested at once

Injection volume is gradually
changed between -12.5 and 25
%
A/F CONTROL
[Test Details]
Control injection volume
-12.5 or 25 % (change injection volume -12.5 % or 25 %)
[Vehicle Condition]
Engine speed: 3,000 rpm or less
Following A/F CONTROL proce-
dure enables technician to check
and graph voltage outputs of both
the A/F sensor and heated oxygen
sensor
For displaying graph, enter ºAC-
TIVE TEST / A/F CONTROL /
USER DATAº, select ºAFS B1S1
and O2S B1S2º by pressing ºYESº
and push ºENTERº. Then press
ºF4º

E74263
Multiplex Network Body ECU
Connector Front View:
B9
B9-5B9-17
- DIAGNOSTICSLIGHTING SYSTEM
05-1595
1785 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
HINT:
Inspect if another system (engine, wiper and so on) is normal before performing this procedure.
1 CHECK HARNESS AND CONNECTOR(IGNITION SWITCH CIRCUIT)
(a) Disconnect the B9 connector from multiplex network body ECU.
(b) Measure the voltage according to the value(s) in the table below.
Standard:
Tester connectionConditionSpecified condition
B9-5 - Body groundIgnition switch is ON
Ignition switch is OFF10 to 14 V
Below 1 V
B9-17 - Body groundIgnition switch is ACC
Ignition switch is OFF10 to 14 V
Below 1 V
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (IGNITION SWITCH - MULTIPLEX
NETWORK BODY ECU)
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)