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HOMESERVICE MANUALSLEXUS2006SC 430REPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTGAUGES & INSTRUMENT PANELSCOMBINATION METER - DIAGNOSTICSPROBLEM SYMPTOMS TABLE
2006 Lexus SC 430

Problem Symptoms Table

2006 Lexus SC 430SECTION Problem Symptoms Table

HINT:

  • Use MALFUNCTION SYSTEMS TABLE  to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the related fuses and relays before confirming the suspected area as shown in MALFUNCTION SYSTEMS TABLE .

MALFUNCTION SYSTEMS 

MALFUNCTION SYSTEMS TABLE

Symptom Suspected Area Reference
Entire combination meter does not operate Refer to troubleshooting ENTIRE COMBINATION METER DOES NOT OPERATE 
Operating lamp control rheostat does not change lamp brightness Refer to troubleshooting OPERATING LAMP CONTROL RHEOSTAT DOES NOT CHANGE LAMP BRIGHTNESS 
Warning buzzer does not sound (key unlock warning, parking brake warning, seat belt warning) Refer to troubleshooting WARNING BUZZER DOES NOT SOUND (PARKING BRAKE WARNING, KEY UNLOCK WARNING, SEAT BELT WARNING) 
Warning buzzer does not sound (open door warning, retractable hardtop operating warning) Refer to troubleshooting WARNING BUZZER DOES NOT SOUND (OPEN DOOR WARNING, RETRACTABLE HARDTOP OPERATING WARNING) 
Compass does not function Refer to troubleshooting COMPASS DOES NOT FUNCTION 

METER GAUGES 

METER GAUGES - SYMPTOM

Symptom Suspected Area Reference
Malfunction in speedometer Refer to troubleshooting MALFUNCTION IN SPEEDOMETER 
Malfunction in tachometer Refer to troubleshooting MALFUNCTION IN TACHOMETER 
Malfunction in engine coolant temperature receive gauge Refer to troubleshooting MALFUNCTION IN ENGINE COOLANT TEMPERATURE RECEIVER GAUGE 
Malfunction in fuel receiver gauge Refer to troubleshooting MALFUNCTION IN FUEL RECEIVER GAUGE 
Malfunction in ODO/TRIP meter Refer to troubleshooting MALFUNCTION IN ODO/TRIP METER 

WARNING LAMPS 

PROBLEM SYMPTOMS TABLE - WARNING LIGHTS

Symptom Suspected Area
MIL does not turn on Refer to troubleshooting
Discharge warning lamp does not turn on
  1. Wire harness
  2. ECM
  3. Combination meter assy
Brake warning lamp does not turn on Refer to troubleshooting
ABS warning lamp does not turn on Refer to troubleshooting
SRS warning lamp does not turn on Refer to troubleshooting
Open door warning lamp does not turn on
  1. Door courtesy lamp switch assy
  2. Driver door ECU
  3. Passenger door ECU
  4. Luggage room J/B ECU
  5. Combination meter assy
Fuel level warning lamp does not turn on
  1. Wire harness
  2. Fuel pump and sender gauge assy
  3. Combination meter assy
Low oil pressure warning lamp does not turn on
  1. Wire harness
  2. Engine oil pressure switch
  3. ECM
  4. Combination meter assy
Window washer level warning lamp does not turn on
  1. Wire harness
  2. Front lamp ECU (Front controller assy)
  3. Washer level warning switch
  4. Combination meter assy
Seat belt warning lamp for driver's seat does not turn on Refer to troubleshooting
Seat belt warning lamp for passenger's seat does not turn on Refer to troubleshooting

INDICATOR LAMPS 

PROBLEM SYMPTOMS TABLE - INDICATOR LIGHTS

Symptom Suspected Area
Shift indicator lamps do not turn on
  1. Wire harness
  2. Park/Neutral position switch
  3. ECM
  4. Shift lock control ECU
  5. Combination meter assy
Turn signal lamps do not turn on
  1. Wire harness
  2. Turn signal lamp switch or hazard warning lamp switch
  3. Combination meter assy
High beam indicator lamp does not turn on
  1. Wire Harness
  2. Headlamp dimmer switch assy
  3. Combination meter assy
SLIP indicator lamp does not turn on Refer to troubleshooting
VSC indicator lamp does not turn on Refer to troubleshooting
VSC OFF indicator lamp does not turn on Refer to troubleshooting

DRIVE MONITOR 

PROBLEM SYMPTOMS TABLE - DRIVE MONITOR

Symptom Suspected Area
Displayed range value is abnormal
  1. Wire harness
  2. Fuel pump and sender gauge assy
  3. ECM
  4. Skid control ECU assy
  5. Combination meter assy
Displayed average fuel consumption value is abnormal
  1. Wire harness
  2. Fuel pump and sender gauge assy
  3. ECM
  4. Skid control ECU assy
  5. Combination meter assy
Displayed average speed value is abnormal
  1. Wire harness
  2. ECM
  3. Skid control ECU assy
  4. Combination meter assy
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.