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Problem Symptoms Table

WARNING: This page is about a different car, the 2004 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.

Warning Lights and Buzzer: 

PROBLEM SYMPTOMS TABLE - WARNING LIGHTS

Symptom Suspect Area
Check Engine warning light does not light up.
  1. Wire Harness or Connector
  2. ECM
  3. Combination Meter Assy
Discharge warning light does not light up.
  1. Wire Harness or Connector
  2. ECM
  3. Combination Meter Assy
Brake warning light does not light up.
  1. Wire Harness or Connector
  2. Skid control ECU
  3. Combination Meter Assy
ABS warning light does not light up.
  1. Wire Harness or Connector
  2. Skid control ECU
  3. Combination Meter Assy
SRS warning light does not light up.
  1. Wire Harness or Connector
  2. Airbag Sensor Assy
  3. Combination Meter Assy
Open Door warning light does not light up.
  1. Wire Harness or Connector
  2. Front Door Courtesy Light
  3. Body ECU
  4. Combination Meter Assy
Fuel Level warning light does not light up.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Combination Meter Assy
Low Oil Pressure warning light does not light up.
  1. Wire Harness or Connector
  2. Low Oil Pressure Warning Switch
  3. Combination Meter Assy
Engine immobiliser warning light does not light up.
  1. Wire Harness or Connector
  2. Theft deterrent ECU
  3. Combination Meter Assy
Driver's seat belt warning light does not light up.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Combination Meter Assy
Passenger's seat belt warning light does not light up.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Combination Meter Assy
VSC warning light does not light up.
  1. Wire Harness or Connector
  2. VSC Circuit
  3. Combination Meter Assy

Indicator Lights: 

PROBLEM SYMPTOMS TABLE - INDICATOR LIGHTS

Symptom Suspect Area
Shift indicator lights do not light up.
  1. Wire Harness or Connector
  2. Neutral Start Switch Circuit
  3. Combination Meter Assy
Turn indicator light does not light up.
  1. Wire Harness or Connector
  2. Turn Signal and Hazard Warning System
  3. Combination Meter Assy
2nd start indicator light does not light up.
  1. Wire Harness or Connector
  2. Pattern select switch
  3. Combination Meter Assy
VSC off indicator light does not light up.
  1. Wire Harness or Connector
  2. VSC Circuit
  3. Combination Meter Assy
SLIP indicator light does not light up.
  1. Wire Harness or Connector
  2. Skid Control ECU
  3. Combination Meter Assy
CRUISE indicator light does not light up.
  1. Wire Harness or Connector
  2. Engine and ETC ECU
  3. Combination Meter Assy
AIR SUS indicator light does not light up.
  1. Wire Harness or Connector
  2. Hight control circuit
  3. Combination Meter Assy
High Beam indicator light does not light up.
  1. Wire Harness or Connector
  2. Headlight Dimmer Switch
  3. Combination Meter Assy
(* 1) KDSS indicator light does not light up.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Combination Meter Assy
((1)) RSCA OFF indicator light does not light up.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Combination Meter Assy
(* 1) TIRE PRS indicator light does not light up.
  1. Refer to troubleshooting
  2. Wire Harness or Connector
  3. Combination Meter Assy
(1) from November 2003

Meter Gauges: 

PROBLEM SYMPTOMS TABLE - METER GAUGES

Symptom Suspect Area
Tachometer, Fuel Gauge and Water Temperature Gauge do not operate.
  1. Wire Harness or Connector
  2. GAUGE Fuse
  3. Combination Meter Assy
Fuel Gauge does not operate or abnormal operation.
  1. Wire Harness or Connector
  2. Fuel Receiver Gauge
  3. Combination Meter Assy

Accessory Meter: 

PROBLEM SYMPTOMS TABLE - ACCESSORY METER

Symptom Suspect Area
Indicated average speed and possible cruising distance are in excessive error (Other meters operate normally).
  1. Wire Harness or Connector
  2. Accessory Meter
  3. Combination Meter Assy
Indicated average fuel consumption and instantaneous fuel consumption are in excessive error (Other meters operate normally).
  1. Combination Meter Assy
Incomplete display (Does not indicate numbers, some digital segments are missing).
  1. Accessory Meter
Indicated clock has excessive error.
  1. Accessory Meter
Time cannot be adjusted, Each mode cannot be switched, Date cannot be reset indicated outside temperature is in excessive error.
  1. Switch Assy
Outside temperature indicator shows "-".
  1. Ambient Temperature Sensor
  2. Accessory Meter
Indicated air pressure and altitude are in excessive error.
  1. Accessory Meter
Indicated direction is in excessive error.
  1. Accessory Meter

OTHERS: 

PROBLEM SYMPTOMS TABLE - OTHER BUZZERS

Symptom Suspect Area
key reminder buzzer does not operate.
  1. Wire Harness or Connector
  2. Body ECU (KSW, DCTY)
  3. Door Courtesy Switch
  4. Key Unlock Warning Switch
  5. Combination Meter Assy
Light reminder buzzer does not operate.
  1. Wire Harness or Connector
  2. Body ECU (DCTY)
  3. Combination Meter Assy
Seat belt Warning buzzer does not operate (Driver side).
  1. Wire Harness or Connector
  2. Seat Belt Buckle Switch
  3. Combination Meter Assy
All buzzer does not operate (A/T reverse, Fuel sediment, Speed warning).
  1. Wire Harness or Connector
  2. Combination Meter Assy
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