2003 LEXUS LS430 Identifying ac

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p.INSPECT REAR SEATBACK HEATER ASSY RH
a. Measure the resistance between the terminals of the rear seatback heater RH.
Standard:
TESTER CONNECTION AND SPECIFIED CONDITION
If the result is not as specified, replace the rear seatback heater assy RH.
Fig. 100: Identifying Rear Seatback Heater RH Connector Terminals

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Tester ConnectionConditionSpecified Condition
A2 - A420°C (68°F)5.4 to 6.6 ohms
S61-4 - A220°C (68°F)5.4 to 6.6 ohms
S61-2 - A420°C (68°F)5.4 to 6.6 ohms
S61-1 - A1AlwaysBelow 1 ohms
S61-3 - A3AlwaysBelow 1 ohms

Fig. 2: Identifying Components Locations (1 Of 3)
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Fig. 3: Identifying Components Locations (2 Of 3)
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Fig. 4: Identifying Components Locations (3 Of 3)
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Fig. 12: Identifying Multi-Information Display Areas
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The multi-information display consists of three display areas (computer area, graphic area, and
warning area) and the master warning indicator. These areas display the contents given in the table
below.
A steering pad switch (for multi-information display) that switches the contents of the multi-
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ITEM DETAILS
3.MULTI-INFORMATION DISPLAY FLOW CHART
ItemDetails
Computer areaDisplays cruise information. In addition, the contents of the display can be switched by
operating the DISP1 of the steering pad switch.
Graphic area
Displays the following information (radar cruise, clearance sonar, open door, compass,
and outside temperature). The items from "Compass" to "Blank" (via outside
temperature) can be switched by operating the DISP2 of the steering pad switch.
Warning areaDisplays warning messages. These messages appear only if an abnormal signal has been
input by a system.
Master
warning
indicatorComes on/blinks with buzzer sounding in accordance to direction from the displayed
item in the warning area.

Fig. 19: Identifying Zone Setting Number
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8.CALIBRATION SETTING MODE
a. Keep pressing the "RESET" for 6 sec. after selection of the compass display mode will activate the
calibration setting mode.
b. Drive the vehicle at a slow speed of 8 km/h (5 MPH) or less in the circular direction.
c. Driving round the circle 1 to 3 times will display the azimuthal direction on the display, completing
the calibration.
d. To finish the calibration mode, press the DISP2 switch long when the calibration is finished or
during the calibration.
HINT:

Fig. 26: Identifying Terminals Of ECU (Combination Meter Assy)
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COMBINATION METER ASSY CONNECTOR TERMINALS REFERENCE
Symbols
(Terminals No.)Wiring
ColorTerminal DescriptionConditionSpecified
Condition
IG + (C12-1) -
Body groundY - Body
groundIgnition switch signal
(ON)Ignition switch OFF -->
ONBelow 1 V --> 10
to 14 V
MPX + (C12-2) -
Body groundGR-B -
Body groundMultiplex
communication signal--
MPX- (C12-3) -
Body groundGR-B -
Body groundMultiplex
communication signal--
S (C12-4) - Body
groundB-Y - Body
groundTachometer signalEngine runningPulse generation
(See waveform 1)
CHECK (C12-5) -
Body groundY-R - Body
groundCHECK ENGINE
signalCHECK ENGINE warning
light ON --> OFFBelow 1 V --> 10
to 14 V
TEMS (C12-6) -
Body groundY - Body
groundTEMS SPORT signalTEMS SPORT indicator
light ON --> OFFBelow 1 V --> 10
to 14 V
A/B (C12-7) - V-R (W) - ODO/TRIP signalIgnition switch ON,
ODO/TRIP switch ON -->
Below 1 V --> 4.5

Fig. 27: Identifying Waveform 1
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Waveform 1 (Reference):
WAVEFORM 1 (REFERENCE)
ItemContents
Tool setting5V/DIV, 10 ms/DIV
Vehicle conditionEngine idle speed