TOYOTA HIGHLANDER 2001 Service Repair Manual

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(c) Unit Check Mode Screen
Screen Description
DisplayContents
Device name/*1Target Device
Segment/*2Target Device Logical address
DTC/*3DTC (Diagnostic Trouble Code)
Timestamp/*4The time and date of past DTCs are displayed. (The year is displayed in 2 digit
format.)
Present Code/*5The DTC output at the service check is displayed.
Past Code/*6Diagnostic memory results and recorded DTCs are displayed.
(d) LAN Monitor (Original) Screen
Check Result
HINT:
Check results of all the devices are displayed.
ResultMeaningAction
No Err
(OK)There are no communication DTCs.-
CHEKThe device responds with a ºcheckº-type DTC.Look up the DTC in ºUnit Check Modeº.
NCONThe device was previously present, but does not respond in
diagnostic mode.1. Check power supply wire harness of the device.
2. Check the AVC-LAN of the device.
OldThe device responded with an old-type DTC.Look up the DTC in ºUnit Check Modeº.
NRESDevice responds in diagnostic mode, but gives no DTC
information.1. Check power supply wire harness of the device.
2. Check the AVC-LAN of the device.

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(e) LAN Monitor (Individual) Screen
Screen Description
DisplayContents
Device name/*1Target device
Segment/*2Target logical address
DTC/*3DTC (Diagnostic Trouble Code)
Sub-Code (device address)/*4Physical address stored with DTC. (If there is no address, nothing is displayed.)
Connection check No./*5Connection check number stored with DTC.
DTC occurrence/*6Number of times the same DTC has been recorded.
2. DISPLAY CHECK
(a) Vehicle Signal Check Mode Screen
Screen Description
NameContents
BatteryBattery voltage is displayed.
PKBParking brake ON/OFF state is displayed.
REVReverse signal ON/OFF state is displayed.
IGIG switch ON/OFF state is displayed.
ADIM/TCANBrightness state DIM (with)/ BRIGHT (without) is displayed.
SPEEDThe vehicle speed, displayed in km/h.
TAILTAIL signal (Head lamp dimmer switch) ON/OFF state is displayed.
HINT:

Only items sending a vehicle signal will be displayed.

This screen is updated once per second when input signals to the vehicle are changed.

I38667
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3. NAVIGATION CHECK
(a) Navigation Check MENU Screen
HINT:
Each item is grayed out or not displayed based on the device settings.
(b) GPS information Screen
Satellite information/*1
Information from a maximum of 12 satellites is displayed on the screen. This information includes the target
GPS satellite number, elevation angle, direction and signal level.
Receiving condition/*2
(DENSO model)
DisplayContents
TThe system is receiving a GPS signal, but is not using it for location.
PThe system is using the GPS signal for location.
-The system cannot receive a GPS signal.
(AISIN AW Model)
DisplayContents
01HThe system cannot receive a GPS signal.
02HThe system is tracing a satellite.
03HThe system is receiving a GPS signal, but is not using it for location.
04HThe system is using the GPS signal for location.
Measurement information/*3
DisplayContents
2D2-dimensional location method is being used.
3D3-dimensional location method is being used.
NGLocation data cannot be used.
ErrorReception error has occurred.
-Any other state.

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Position information/*4
DisplayContents
PositionLatitude and longitude information on the current position is displayed.
Date information/*5
DisplayContents
DateThe date/time information obtained from GPS signal is displayed in Greenwich
mean time (GMT). The last 4 digits are displayed.
(c) Vehicle Signal Check Screen
Vehicle signal
DisplayContents
REV/*1REV signal ON/OFF state is displayed.
SPD/*2SPD signal condition is displayed.
Sensor signal
DisplayContents
Gyro sensor/*3Gyro sensor output condition is displayed (when the vehicle runs straight or is sta-
tionary, the voltage is approximately 2.5 V).
HINT:
Signals are updated once per second only when vehicle sensor signals are changed.
(d) Parts Information Screen
Screen description
DisplayContents
Navigation Manufacturer/*1Navigation ECU manufacturer is displayed.
Navigation Version No./*2Navigation ECU version is displayed.
Disc Manufacturer/*3Map disc manufacturer is displayed.
Disc Version No./*4Map disc version is displayed.

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(e) Memory Copy/Paste Screen
HINT:
This function cannot be used.

05ISA-02
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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.

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5. There are 2 methods to exit. Use one of them.
(a) Turn the ignition switch off.
(b) Press the ºDisplayº switch for 3 seconds.

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FI0534
A80020
Hand-held Tester
DLC3
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DIAGNOSIS SYSTEM
1. DESCRIPTION

When troubleshooting On-Board Diagnostic (OBD II) ve-
hicles, the vehicle must be connected to the OBD II scan
tool (in compliance with SAE J1978) or the hand-held
tester. Various data output from the vehicle's ECM can
then be read.

OBD II regulations require that the vehicle's on-board
computer illuminates the Malfunction Indicator Lamp
(MIL) on the instrument panel when the computer detects
a malfunction in: 1) the emission control system/compo-
nents, or 2) the powertrain control components (which af-
fect vehicle emissions), or 3) the computer. In addition,
the applicable Diagnostic Trouble Codes (DTCs) pre-
scribed by SAE J2012 are recorded in the ECM memory
(see page 05-48).
If the malfunction does not reoccur in 3 consecutive trips, the
MIL turns off automatically but the DTCs remain recorded in the
ECM memory.

To check DTCs, connect the hand-held tester or OBD II
scan tool to the Data Link Connector 3 (DLC3) of the ve-
hicle. The hand-held tester or OBD II scan tool also en-
ables you to erase the DTC and check the freeze frame
data and various forms of engine data (see the instruction
manual for the OBD II scan tool or the hand-held tester).
The DTC includes SAE controlled codes and manufactur-
er controlled codes. SAE controlled codes must be set ac-
cording to the SAE, while manufacturer controlled codes
can be set by a manufacturer with certain restrictions (see
the DTC chart on page 05-48).

The diagnosis system operates in ºnormal modeº during
normal vehicle use. In ºnormal modeº, 2 trip detection log-
ic* is used to ensure accurate detection of malfunctions.
A ºcheck modeº is also available to technicians as an op-
tion. In ºcheck modeº, 1 trip detection logic is used for sim-
ulating malfunction symptoms and increasing the sys-
tem's ability to detect malfunctions, including intermittent
malfunctions (hand-held tester only) (see page 05-40).

3 2 1 45678
9 1 0 111 21 31 41 51 6
DLC3
A04550
SG CG SIL
BAT
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*2 trip detection logic:
When a malfunction is first detected, the malfunction is
temporarily stored in the ECM memory (1st trip). If the
ignition switch is turned OFF and then ON again, and the
same malfunction is detected again, the MIL will illumi-
nate (2nd trip).

Freeze frame data:
The freeze frame data records the engine conditions (fuel
system, calculated load, engine coolant temperature, fuel
trim, engine speed, vehicle speed, etc.) when a malfunc-
tion is detected. When troubleshooting, freeze frame data
can help determine if the vehicle was running or stopped,
if the engine was warmed up or not, if the air-fuel ratio
was lean or rich, and other data from the time the malfunc-
tion occurred.
Priorities for troubleshooting:
When multiple DTCs occur, find out the order in which the DTCs
should be inspected by checking the component's DTC chart.
If no instructions are written in the DTC chart, check DTCs in the
following order of priority:
(a) DTCs other than fuel trim malfunction DTCs (P0171 and
P0172) and misfire DTCs (P0300 to P0304).
(b) Fuel trim malfunction DTCs (P0171 and P0172).
(c) Misfire DTCs (P0300 to P0304).
2. CHECK DLC3
The vehicle's ECM uses the ISO 9141-2 for communica-
tion protocol. The terminal arrangement of the DLC3 com-
plies with SAE J1962 and matches the ISO 9141-2 for-
mat.
SymbolTerminal No.NameReference terminalResultCondition
SIL7Bus º+º line5 - Signal groundPulse generationDuring transmission
CG4Chassis groundBody groundBelow 1 WAlways
SG5Signal groundBody groundBelow 1 WAlways
BAT16Battery positiveBody ground9 to 14 VAlways

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HINT:
Connect the cable of the OBD II scan tool or the hand-held tes-
ter to the DLC3, turn the ignition switch ON and attempt to use
the OBD II scan tool or the hand-held tester. If the screen dis-
plays UNABLE TO CONNECT TO VEHICLE, a problem exists
in the vehicle side or the tester side.

If the communication is normal when the tool is connected
to another vehicle, inspect the DLC3 on the original ve-
hicle.

If the communication is still impossible when the tool is
connected to another vehicle, the problem is probably in
the tool itself. Consult the Service Department listed in the
tool's instruction manual.
3. CHECK BATTERY VOLTAGE
Standard: 11 to 14 V
If the voltage is below 11 V, recharge the battery before pro-
ceeding.
4. CHECK MIL
(a) The MIL turns on when the ignition switch is turned ON
and the engine is not running.
HINT:
If the MIL does not turn on, troubleshoot the MIL circuit (see
page 05-359).
(b) When the engine is started, the MIL should turn off. If the
lamp remains on, the diagnosis system has detected a
malfunction or abnormality in the system.