2003 LEXUS LS430 warning light

73.INSPECT PARKING BRAKE PEDAL TRAVEL (SEE ADJUSTMENT )
74.ADJUST PARKING BRAKE PEDAL TRAVEL (SEE ADJUSTMENT
)
75.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.2 (SEE REPLACEMENT
)
76.INSTALL INSTRUMENT PANEL AIR BAG ASSY LOWER NO.1 (SEE REPLACEMENT
)
77.INSTALL INSTRUMENT PANEL SAFETY PAD SUB-ASSY NO.1 (SEE REPLACEMENT
)
78.INSTALL OUTER MIRROR SWITCH ASSY
79.INSTALL COIN BOX ASSY
80.INSTALL INSTRUMENT PANEL UNDER COVER SUB-ASSY NO.1 (SEE REPLACEMENT
)
81.INSTALL INSTRUMENT CLUSTER FINISH PANEL CENTER LOWER
82.INSTALL INSTRUMENT CLUSTER FINISH PANEL END
83.CONNECT BATTERY NEGATIVE TERMINAL
84.INSPECT SRS WARNING LIGHT (SEE DIAGNOSIS SYSTEM
)
85.CHECK FOR EXHAUST GAS LEAKS
86.PERFORM YAWRATE SENSOR ZERO POINT CALIBRATION (SEE CALIBRATION
)
87.PERFORM INITIALIZATION (SEE INITIALIZATION
)
COMPONENTS

WARNING/INDICATOR DETAILS
2.MULTI-INFORMATION DISPLAY
ItemDetail
TURN SIGNALReceives the turn signal from the driver side J/B ECU (Direct line).
BEAMReceives the beam signal from the driver side J/B ECU (BEAN).
CHARGEReceives the malfunction charge signal from the ECM (BEAN).
CHECK E/GReceives the malfunction charge signal from the ECM (Direct line).
DOOROpen door indicator comes on receiving from a signal each door ECU (BEAN).
D BELTReceives the driver seat belt signal (Unfastened) from the driver side J/B ECU
(BEAN).
BELTReceives the passenger seat belt signal (Unfastened) from the airbag sensor ECU
(BEAN).
BRAKEReceives the parking brake switch/brake fluid level warning signal from the skid
control ECU (BEAN).
CRUISEReceives the malfunction signal from the ECM (BEAN).
AIR BAGReceives the malfunction signal from the airbag sensor ECU (BEAN).
A/TPReceives the P signal from the ECM (BEAN).
A/T RReceives the R signal from the ECM (BEAN).
A/T NReceives the N signal from the ECM (BEAN).
A/T DReceives the D signal from the ECM (BEAN).
A/T SReceives the S signal from the ECM (BEAN).
SLIPReceives the malfunction signal from the skid control ECU (BEAN).
VSC OFFReceives the malfunction signal from the skid control ECU (BEAN).
WASHERReceives the washer level warning switch from the front light control ECU (BEAN).
ABSReceives the malfunction skid control ECU (BEAN).
TEMS SPORTReceives the sports mode signal from the air suspension ECU (Direct line).
ECT POWERReceives the power mode signal from the ECM (BEAN).
ECT SNOWReceives the snow mode signal from the ECM (BEAN).
AFS OFFReceives the AFS OFF signal from the AFS ECU (BEAN).
TAIL or HEADReceives the malfunction tail or head signal from driver side J/B ECU (BEAN).

Once calibration is completed, it is not necessary to perform the above procedures unless the magnetic
field strength is drastically changed.
HINT:
Inspect the related "Fuse" and "Relay" before confirming the suspected area as shown in the charts below.
MALFUNCTION SYSTEM:
MALFUNCTION SYSTEM SYMPTOMS REFERENCE
METER GAUGES:
METER GAUGES SYMPTOMS REFERENCE
WARNING LIGHTS:
SymptomSuspected AreaSee Procedure
Entire combination meter does
not operate1. Refer to troubleshootingENTIRE COMBINATION
METER DOES NOT OPERATE
Malfunction in ODO/TRIP SW1. Refer to troubleshootingMALFUNCTION IN ODO/TRIP
SW
Operating light control rheostat
does not change light brightness1. Refer to troubleshootingOPERATING LIGHT
CONTROL RHEOSTAT DOES
NOT CHANGE LIGHT
BRIGHTNESS
SymptomSuspected AreaSee Procedures
Malfunction in speedometer1. Refer to
troubleshootingsee MALFUNCTION IN SPEEDOMETER
Malfunction in tachometer1. Refer to
troubleshootingMALFUNCTION IN TACHOMETER
Malfunction in fuel receiver
gauge1. Refer to
troubleshootingMALFUNCTION IN FUEL RECEIVER
GAUGE
Malfunction in water
temperature receiver gauge1. Refer to
troubleshootingMALFUNCTION IN WATER
TEMPERATURE RECEIVER GAUGE

Fig. 20: Warning Lights Problem Symptoms Table
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INDICATOR LIGHTS:

Fig. 21: Indicator Lights Problem Symptoms Table
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WARNING AREA:

Fig. 26: Identifying Terminals Of ECU (Combination Meter Assy)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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

FUEL SIGNAL (GAUGE SIGNAL) FAIL-SAFE REFERENCE
SHIFT INDICATOR:
SHIFT INDICATOR FAIL-SAFE REFERENCE
GEAR POSITION INDICATOR (1 TO 6):
GEAR POSITION INDICATOR (1 TO 6) FAIL-SAFE REFERENCE
ABS & BRAKE:
ABS & BRAKE FAIL-SAFE REFERENCE
DOOR:
DOOR FAIL-SAFE REFERENCE
TAIL:
TAIL FAIL-SAFE REFERENCE
BEAM:
BEAM FAIL-SAFE REFERENCE
ConditionResponseRecovery
While the ignition switch is in the ON position, the
sender signal is interrupted for 60 seconds and a
malfunction signal is received from one of the gauges
for 10 to 20 seconds.The needle indicates
E, and the warning
light comes on.The ignition switch is
turned from off to on and
normal data is received.
ConditionResponseRecovery
"P to D" data is interrupted for 3 seconds.All indicators go off.Normal data is received.
"S" data is interrupted for 3 seconds.The "S" indicator goes off.Normal data is received.
ConditionResponseRecovery
Gear position data is interrupted for 3 seconds or a malfunction
signal is received.The indicator goes
off.Normal data is
received.
ConditionResponseRecovery
ABS & Brake data is interrupted for 10 seconds.The warning light comes on.Normal data is received.
ConditionResponseRecovery
Regular data is interrupted.The data received most recently remains displayed.Normal data is received.
ConditionResponseRecovery
Regular data is interrupted.The data received most recently remains displayed.Normal data is received.
ConditionResponseRecovery
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11[The indicator goes off.Normal data is received.

AIRBAG:
AIRBAG FAIL-SAFE REFERENCE
COMPASS:
COMPASS FAIL-SAFE REFERENCE
OUTSIDE TEMP.:
OUTSIDE TEMP FAIL-SAFE REFERENCE
MULTI-INFORMATION:
MULTI-INFORMATION FAIL-SAFE REFERENCE
RHEOSTAT:
RHEOSTAT FAIL-SAFE REFERENCE
DATA LIST
According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one
method to shorten work time.
a. Warm up the en
gine.
ConditionResponseRecovery
Airbag data is interrupted for 10 seconds or there is a
malfunction in the meter's internal CPU.The warning light
comes on.Normal data is
received.
ConditionResponseRecovery
Unspecified data is received.Only the compass frame is displayed.Direction data is received.
ConditionResponseRecovery
Abnormal data and sensor malfunctioning data are
received."- -.°C (- -°F)" is
displayed.Normal data is
received.
Outside temp, data is interrupted for 10 seconds.The display becomes
blank.Normal data is
received.
ConditionResponseRecovery
Cruise information data is interrupted
for 60 seconds.The display becomes blank (only measurement
units are displayed).Normal data is
received.
ConditionResponseRecovery
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03[
abnormal data is received.The display remains in
daytime mode.Normal data is
received.