LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2005 >> LS 430 >> Repair and Diagnosis >> Electrical >> Gauges >> Combination Meter - Diagnostics >> Problem Symptoms Table
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Problem Symptoms Table

HINT:

Inspect the related "Fuse" and "Relay" before confirming the suspected area as shown in the charts below.

MALFUNCTION SYSTEM: 

MALFUNCTION SYSTEM SYMPTOMS REFERENCE

Symptom Suspected Area See Procedure
Entire combination meter does not operate 1. Refer to troubleshooting ENTIRE COMBINATION METER DOES NOT OPERATE 
Malfunction in ODO/TRIP SW 1. Refer to troubleshooting MALFUNCTION IN ODO/TRIP SW 
Operating light control rheostat does not change light brightness 1. Refer to troubleshooting OPERATING LIGHT CONTROL RHEOSTAT DOES NOT CHANGE LIGHT BRIGHTNESS 

METER GAUGES: 

METER GAUGES SYMPTOMS REFERENCE

Symptom Suspected Area See Procedures
Malfunction in speedometer 1. Refer to troubleshooting see MALFUNCTION IN SPEEDOMETER 
Malfunction in tachometer 1. Refer to troubleshooting MALFUNCTION IN TACHOMETER 
Malfunction in fuel receiver gauge 1. Refer to troubleshooting MALFUNCTION IN FUEL RECEIVER GAUGE 
Malfunction in water temperature receiver gauge 1. Refer to troubleshooting MALFUNCTION IN WATER TEMPERATURE RECEIVER GAUGE 

WARNING LIGHTS: 

PROBLEM SYMPTOMS TABLE - WARNING LIGHTS

Symptom Suspected Area
Check Engine warning light does not come on.
  1. ECM
  2. Wire Harness or Connector
  3. Combination Meter Assy
Discharge warning light does not come on.
  1. ECM
  2. Wire Harness or Connector
  3. Combination Meter Assy
Brake warning light does not come on.
  1. Brake Fluid Level Warning Switch or Parking Brake Switch
  2. Wire Harness or Connector
  3. Combination Meter Assy
ABS warning light does not come on.
  1. Skid Control ECU
  2. Wire Harness or Connector
  3. Combination Meter Assy
SRS warning light does not come on.
  1. Airbag Sensor Assembly Center
  2. Wire Harness or Connector
  3. Combination Meter Assy
Open Door warning light does not come on.
  1. Door Courtesy Switch
  2. Wire Harness or Connector
  3. Each Door ECU
  4. Combination Meter Assy
Seat belt warning lamp for driver's seat does not operate
  1. Refer to troubleshooting
Seat belt warning lamp for passenger's seat does not operate
  1. Refer to troubleshooting

INDICATOR LIGHTS: 

PROBLEM SYMPTOMS TABLE - INDICATOR LIGHTS

Symptom Suspected Area
Turn indicator light does not come on.
  1. Turn Signal and Hazard Warning System
  2. Wire Harness or Connector
  3. Combination Meter Assy
High beam indicator light does not come on.
  1. Combination Switch ECU
  2. Wire Harness or Connector
  3. Combination Meter Assy
Washer level indicator light does not come on.
  1. Washer Level Warning Switch
  2. Wire Harness or Connector
  3. Front Light Control ECU
  4. Combination Meter Assy
CRUISE indicator light does not come on.
  1. ECM
  2. Wire Harness or Connector
  3. Combination Meter Assy
SLIP indicator light does not come on.
  1. Wire Harness or Connector
  2. Skid Control ECU
  3. Combination Meter Assy
VSC OFF indicator light does not come on.
  1. Wire Harness or Connector
  2. Skid Control ECU
  3. Combination Meter Assy
TEMS SPORT indicator light does not come on.
  1. Wire Harness or Connector
  2. Air Suspension ECU
  3. Combination Meter Assy
ECT POWER indicator light does not come on.
  1. Wire Harness or Connector
  2. ECM
  3. Combination Meter Assy
ECT SNOW indicator light does not come on.
  1. Wire Harness or Connector
  2. ECM
  3. Combination Meter Assy
AFS OFF indicator light does not come on.
  1. Wire Harness or Connector
  2. AFS ECU
  3. Combination Meter Assy
TAIL/HEAD indicator light does not come on.
  1. Wire Harness or Connector
  2. Driver Side J/B ECU
  3. Combination Meter Assy
A/T shift indicator light does not come on.
  1. Park Neutral Position Switch
  2. Wire Harness or Connector
  3. ECM
  4. Combination Meter Assy

WARNING AREA: 

PROBLEM SYMPTOMS TABLE - WARNING SYSTEM

Symptom Suspected Area
Warning display in the SMART KEY system does not turn on.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Theft Deterrent ECU
  4. Combination Meter Assy
"Low Oil Pressure" warning display does not turn on.
  1. Low Oil Pressure Switch
  2. Wire Harness or Connector
  3. ECM
  4. Combination Meter Assy
"Brake Wear" warning display does not turn on.
  1. Front/Rear Brake Pad Sensor
  2. Wire Harness or Connector
  3. Driver Side J/B ECU
  4. Combination Meter Assy
"Park Brake" warning display does not turn on.
  1. Parking Brake Switch
  2. Wire Harness or Connector
  3. Skid Control ECU
  4. Combination Meter Assy
Warning display of OPEN DOOR condition does not turn on.
  1. Door Courtesy Switch
  2. Wire Harness or Connector
  3. Each Door ECU
  4. Combination Meter Assy
"Trunk Open" warning display does not turn on.
  1. Luggage Door Lock Assy
  2. Wire Harness or Connector
  3. Luggage Room J/B ECU
  4. Combination Meter Assy
"Moon roof Open" warning display does not turn on.
  1. Wire Harness or Connector
  2. Sliding Roof ECU
  3. Combination Meter Assy
Warning display in the VSC system does not turn on.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Skid Control ECU
  4. Combination Meter Assy
Warning display in the RADAR CRUISE system does not turn on.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. ECM
  4. Combination Meter Assy
"Low ENG Oil Level" warning display does not turn on.
  1. Low Oil Level Sensor
  2. Wire Harness or Connector
  3. ECM
  4. Combination Meter Assy
"Low Washer Fluid" warning display does not turn on.
  1. Washer Level Warning Switch
  2. Wire Harness or Connector
  3. Front Light Control ECU
  4. Combination Meter Assy
"Head Light Leveling" warning display does not turn on.
  1. Wire Harness or Connector
  2. Passenger Side J/B ECU
  3. Combination Meter Assy
Warning display of TIRE PRESSURE condition does not turn on.
  1. Wire Harness or Connector
  2. Skid Control ECU
  3. Combination Meter Assy
Warning display of A/C FILTER condition does not turn on.
  1. Wire Harness or Connector
  2. A/C Amplifire Assy
  3. Combination Meter Assy
Warning display of OIL MAINTENANCE condition does not turn on.
  1. Wire Harness or Connector
  2. Combination Meter Assy
"Height Hi" warning display does not turn on.
  1. Wire Harness or Connector
  2. Air Suspension ECU
  3. Combination Meter Assy

COMPUTER AREA: 

PROBLEM SYMPTOMS TABLE - COMPUTER AREA

Symptom Suspected Area
Warning display of cruise information does not turn on.
  1. Wire Harness or Connector
  2. ECM
  3. Combination Meter Assy

GRAPHIC AREA: 

PROBLEM SYMPTOMS TABLE - GRAPHIC AREA

Symptom Suspected Area
Warning display in the RADAR CRUISE system does not turn on.
  1. Refer to troubleshooting
  2. Steering Pad Switch
  3. Wire Harness or Connector
  4. ECM
  5. Combination Meter Assy
Warning display in the PARK SONAR system does not turn on.
  1. Refer to troubleshooting
  2. Steering Pad Switch
  3. Wire Harness or Connector
  4. Park Sonar ECU
  5. Combination Meter Assy
Malfunction in compass operation.
  1. Refer to calibration
  2. Combination Meter Assy
Warning display of OPEN DOOR condition does not turn on.
  1. Door Courtesy Switch
  2. Wire Harness or Connector
  3. Each Door ECU
  4. Combination Meter Assy
Warning display of OUTSIDE TEMP condition does not turn on.
  1. Ambient Temperature Sensor
  2. Wire Harness or Connector
  3. A/C Amplifier Assy
  4. Combination Meter Assy

BUZZER: 

PROBLEM SYMPTOMS TABLE - BUZZER

Symptom Suspected Area
Key reminder warning buzzer does not sound.
  1. Performing the active test.
  2. Unlock warning switch
  3. Wire Harness or Connector
  4. Combination Meter Assy
Light reminder warning buzzer does not sound.
  1. Performing the active test.
  2. Refer to troubleshooting
  3. Wire Harness or Connector
  4. Combination Meter Assy
Seat belt warning buzzer does not sound.
  1. Performing the active test.
  2. Refer to troubleshooting
  3. Wire Harness or Connector
  4. Combination Meter Assy
Reverse and sports reject warning buzzer does not sound.
  1. Performing the active test.
  2. Refer to troubleshooting
  3. Wire Harness or Connector
  4. Combination Meter Assy
Speed warning buzzer does not sound.
  1. Performing the active test.
  2. Wire Harness or Connector
  3. Combination Meter Assy

HINT:

Refer to ON-VEHICLE INSPECTION  .

scientia non olet · About LEMON Manuals