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Problem Symptoms Table

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

GAUGE: 

PROBLEM SYMPTOMS

Symptom Suspect Area See Section
Speedometer does not operate or operates abnormally.
  1. Speedometer circuit
  2. Speed sensor circuit
  3. Combination meter
  1. SPEEDOMETER 
  2. SPEED SENSOR CIRCUIT 
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Tachometer does not operate or operates abnormally.
  1. Tachometer circuit
  2. Igniter signal circuit
  3. Combination meter
  1. TACHOMETER 
  2. IGNITER SIGNAL CIRCUIT 
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Fuel gauge does not operate or operates abnormally.
  1. Fuel gauge circuit
  2. Combination meter
  1. FUEL GAUGE 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Engine Coolant temperature does not operate or operates abnormally.
  1. Engine Coolant temperature gauge circuit
  2. Combination meter
  1. ENGINE COOLANT TEMPERATURE GAUGE 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE

INDICATOR LIGHT AND WARNING LIGHT: 

INDICATOR LIGHT AND WARNING LIGHT

Symptom Suspect Area See Section
Shift indicator lights does not light up.
  1. Bulb circuit
  2. Park/Neutral position switch circuit
  3. Transmission switch circuit
  4. Combination meter
  1. BULB CIRCUIT 
  2. DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT)
  3. DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT)
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Open door warning light does not light up.
  1. Bulb circuit
  2. Door courtesy switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. DOOR COURTESY LIGHT AND COURTESY SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Passenger seat belt warning light does not light up.
  1. Bulb circuit
  2. Passenger seat belt buckle switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. PASSENGER BUCKLE ILLUMINATION CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Driver seat belt warning light does not light up.
  1. Bulb circuit
  2. Driver seat belt buckle switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. DRIVER BUCKLE SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Low oil pressure warning light does not light up.
  1. Bulb circuit
  2. Low oil pressure warning switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. INSPECTION
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Discharge warning light does not light up.
  1. Bulb circuit
  2. Alternator circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. GENERATORS & REGULATORS
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Brake warning light does not light up.
  1. Bulb circuit
  2. Brake fluid level warning switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. TEST D: BRAKE WARNING LIGHT CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Headlight indicator light does not light up.
  1. Bulb circuit
  2. Headlight system
  3. Combination system
  1. BULB CIRCUIT 
  2. DRIVE SIDE JUNCTION BLOCK (BODY NO.2 CONTROL SYSTEM) - DIAGNOSIS - LS 430
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Taillight indicator light does not light up.
  1. Bulb circuit
  2. Taillight system
  3. Combination meter
  1. BULB CIRCUIT 
  2. DRIVE SIDE JUNCTION BLOCK (BODY NO.2 CONTROL SYSTEM) - DIAGNOSIS - LS 430
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
CRUISE MAIN indicator light does not light up.
  1. Bulb circuit
  2. Cruise control switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. CRUISE CONTROL SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
ECT SNOW indicator light does not light up.
  1. Bulb circuit
  2. ECT pattern select switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. PATTERN SELECT SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
ECT PWR indicator light does not light up.
  1. Bulb Circuit
  2. ECT pattern select switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. PATTERN SELECT SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
VSC OFF indicator light does not light up.
  1. Bulb circuit
  2. VSC system
  3. Combination meter
  1. BULB CIRCUIT 
  2. SELF-DIAGNOSTIC SYSTEM
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Washer fluid level warning light does not light up.
  1. Bulb circuit
  2. Washer fluid level warning switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. WASHER FLUID LEVEL SENSOR CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Rear lights warning light does not light up.
  1. Bulb circuit
  2. Luggage room J/B system
  3. Combination meter
  1. BULB CIRCUIT 
  2. LUGGAGE ROOM JUNCTION BLOCK (BODY NO 4) CONTROL SYSTEM - DIAGNOSIS - LS 430
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Engine oil level warning light does not light up.
  1. Bulb circuit
  2. Engine oil level warning switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. INSPECTION
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Fuel level warning light does not light up.
  1. Bulb circuit
  2. Fuel level warning switch
  3. Combination meter
  1. BULB CIRCUIT 
  2. INSPECTION
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
High-beam indicator light does pot light up.
  1. Bulb circuit
  2. Light control switch circuit
  3. Headlight circuit
  4. Combination meter
  1. BULB CIRCUIT 
  2. LIGHT CONTROL SWITCH CIRCUIT
  3. HEADLIGHT CIRCUIT
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
SRS warning light does not light up.
  1. Bulb circuit
  2. Airbag sensor assembly
  3. Combination meter
  1. BULB CIRCUIT 
  2. DIAGNOSTICS
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Malfunction indicator light does not light up.
  1. Bulb circuit
  2. Engine system
  3. Combination meter
  1. BULB CIRCUIT 
  2. BASIC DIAGNOSTIC PROCEDURES
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Slip indicator light does not light up.
  1. Bulb circuit
  2. TRAC system
  3. Combination system
  1. BULB CIRCUIT 
  2. SELF-DIAGNOSTIC SYSTEM
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
TRAC OFF indicator light does not light up.
  1. Bulb circuit
  2. 'TRAC' system
  3. Combination system
  1. BULB CIRCUIT 
  2. SELF-DIAGNOSTIC SYSTEM
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
ABS warning light does not light up.
  1. Bulb circuit
  2. ABS system
  3. Combination meter
  1. BULB CIRCUIT 
  2. SELF-DIAGNOSTIC SYSTEM
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Front fog light indicator light does not light up.
  1. Bulb circuit
  2. Front fog light switch circuit
  3. Combination meter
  1. BULB CIRCUIT 
  2. COMBINATION SWITCH CONTROL SYSTEM - DIAGNOSIS
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
VSC warning light does not light up.
  1. Bulb circuit
  2. VSC system
  3. Combination meter
  1. BULB CIRCUIT 
  2. SELF-DIAGNOSTIC SYSTEM
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Headlight beam leveling indicator light does not light up.
  1. Bulb circuit
  2. Headlight beam level control system
  3. Combination meter
  1. BULB CIRCUIT 
  2. INSPECTION
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
All warning indicator does hot light up.
  1. Combination meter power source circuit
  2. Combination meter
  1. COMBINATION METER ECU POWER SOURCE CIRCUIT 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE

MULTI-INFORMATION DISPLAY: 

MULTI-INFORMATION DISPLAY

Symptom Suspect Area See Section
"RADAR CRUISE READY" indicator light does not light up.
  1. Multi-information circuit
  2. Cruise control switch circuit
  3. Combination meter
  1. MULTI INFORMATION DISPLAY 
  2. CRUISE CONTROL SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
"CHECK CRUISE SYSTEM" indicator light does not light up.
  1. Multi-information circuit
  2. Cruise control switch circuit
  3. Combination meter
  1. MULTI INFORMATION DISPLAY 
  2. CRUISE CONTROL SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
"ODO/TRIP" indicator light does not light up.
  1. Multi-information circuit
  2. ODO/TRIP switch circuit
  3. Combination meter
  1. MULTI INFORMATION DISPLAY 
  2. INSPECTION
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
All warning indicator does not sound.
  1. Combination meter power source circuit
  2. Combination meter
  1. COMBINATION METER ECU POWER SOURCE CIRCUIT 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE

BUZZER: 

BUZZER INDICATION

Symptom Suspect Area See Section
Key remainder buzzer does not sound.
  1. Buzzer circuit
  2. Key unlock warning switch circuit
  3. Driver door courtesy switch circuit
  4. Combination meter
  1. BUZZER 
  2. DTC B2780 KEY UNLOCK WARNING SWITCH MALFUNCTION
  3. DOOR COURTESY LIGHT AND COURTESY SWITCH CIRCUIT
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Light remainder buzzer does not sound.
  1. Buzzer circuit
  2. Key unlock warning switch circuit
  3. Driver door courtesy switch circuit
  4. Combination meter
  1. BUZZER 
  2. DTC B2780 KEY UNLOCK WARNING SWITCH MALFUNCTION
  3. DOOR COURTESY LIGHT AND COURTESY SWITCH CIRCUIT
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Seat belt warning buzzer does not sound.
  1. Buzzer Circuit
  2. Seat belt buckle switch circuit
  3. Combination meter
  1. BUZZER 
  2. DRIVER BUCKLE SWITCH CIRCUIT
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Reverse-Warning buzzer does not sound.
  1. Buzzer circuit
  2. Park/Neutral position switch circuit
  3. Combination meter
  1. BUZZER 
  2. DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT)
  3. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
Speed warning buzzer does not sound.
  1. Buzzer circuit
  2. Speedometer circuit
  3. Speed sensor signal circuit
  4. Combination meter
  1. BUZZER 
  2. SPEEDOMETER 
  3. SPEED SENSOR CIRCUIT 
  4. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
All warning buzzer does not sound.
  1. Combination meter power source circuit
  2. Combination meter
  1. COMBINATION METER ECU POWER SOURCE CIRCUIT 
  2. HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE
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