Last Modified: 4-30-2014 6.6 T Doc ID: RM000001FCA000X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: LIGHTING: LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE; 2006 MY LX470 [05/2005 -        ]

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below 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.

Lighting system

Symptom

Suspected area

See page

headlight does not come on (LOW beam)

1. Light control switch circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Light Control Switch Circuit

2. Headlight relay circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Headlight Relay Circuit

3. Combination switch

-

4. Body ECU (Main)

-

Headlight system does not operate (HI beam or Flash)

1. Dimmer signal circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Dimmer Signal Circuit

2. Light control switch circuit

-

3. Combination switch

-

4. Body ECU (Main)

-

Headlight and taillight system

Symptom

Suspected area

See page

Automatic light control system does not operate

1. Light control sensor circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Light Control Switch Circuit

2. Light control sensor

-

3. Body ECU (Main)

-

Taillight system does not comes on

1. Taillight relay circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Taillight Relay Circuit

2. Taillight circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Taillight Circuit

3. Light control switch circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Light Control Switch Circuit

4. Combination switch

-

5. Sub body ECU

-

6. Body ECU (Main)

-

Stop light system does not come on

1. Stop light switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: STOP LIGHT SWITCH: ON-VEHICLE INSPECTION

2. Stop light circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Stop Light Circuit

3.Sub body ECU

-

Automatic light control system does not operate

1. Automatic light control sensor

2006 MY LX470 [05/2005 -        ]; LIGHTING: AUTOMATIC LIGHT CONTROL SENSOR: ON-VEHICLE INSPECTION

2. Light control sensor

-

3. Door courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: FRONT DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

4. Wire harness

-

5. Body ECU (Main)

-

Auto turn-off system does not operate when driver door is opened

Driver door courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: FRONT DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

Headlight and taillight do not come on

1. Wire harness

-

2. Body ECU (Main)

-

Headlight and taillight stay on

1. Wire harness

-

2. Body ECU (Main)

-

Only on headlight come on

1. Bulb

-

2. Daytime running light relay

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHT CONTROL SWITCH: ON-VEHICLE INSPECTION

3. Wire harness

-

4. Body ECU (Main)

-

LO-beam does not come on (ALL)

1. Engine room junction block relay circuit

-

2. Wire harness

-

3. Body ECU (Main)

-

LO-beam does not come on (one side)

1. Bulb

-

2. H-LP L-LWR fuse

-

3. H-LP R-LWR fuse

-

4. Wire harness

-

HI-beam does not come on (ALL)

1. Headlight dimmer switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: HEADLIGHT DIMMER SWITCH: INSPECTION

2. Wire harness

-

3. Body ECU (Main)

-

HI-beam does not come on (one side)

1. Bulb

-

2. H-LP L-LWR fuse

-

3. H-LP R-LWR fuse

-

4. Daytime running light relay

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHT CONTROL SWITCH: ON-VEHICLE INSPECTION

5. Wire harness

-

Flash does not come on

1. Headlight dimmer switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: HEADLIGHT DIMMER SWITCH: COMPONENTS

2. Wire harness

-

3. Body ECU (Mian)

-

Headlight does not come on

1. Bulb

-

2. Headlight dimmer switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: HEADLIGHT DIMMER SWITCH: COMPONENTS

3. Light control switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHT CONTROL SWITCH: ON-VEHICLE INSPECTION

4. Daytime running light relay

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHT CONTROL SWITCH: ON-VEHICLE INSPECTION

5. Engine room junction block circuit

-

6. Wire harness

-

7. Body ECU (Main)

-

Headlight does not come on with light control switch in HEAD

1. Light control switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHT CONTROL SWITCH: ON-VEHICLE INSPECTION

2. Wire harness

-

3. Body ECU (Mian)

-

Headlight does not go off with light control switch in OFF

1. Ening room junction block circuit

-

2. Wire harness

-

3. Body ECU (Mian)

-

Headlight flickers

1. Bulb

-

2. Wire harness

-

Headlight is dark

1. Bulb

-

2. Wire harness

-

Taillight does not come on with light control switch in TAIL

1. Light control switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHT CONTROL SWITCH: ON-VEHICLE INSPECTION

2. Ening room junction block circuit

-

3. Wire harness

-

4. Sub body ECU

-

5. Body ECU (Main)

-

Headlight dies not come on with running and light control switch n OFF

1. ECU-B2 fuse

-

2. ECU-IG1 fuse

-

3. Daytime running light relay

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHT CONTROL SWITCH: ON-VEHICLE INSPECTION

4. Geneator terminal

-

5. Parking brake switch

2006 MY LX470 [05/2005 -        ]; PARKING BRAKE: PARKING BRAKE ASSEMBLY: COMPONENTS

6. Wire harness

-

7. Body ECU (Main)

-

Hazard warning system

Symptom

Suspected area

See page

Hazard warning light does not come on

1. Hazard switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: HAZARD WARNING SWITCH: ON-VEHICLE INSPECTION

2. Flasher relay

-

Illumination light system

Symptom

Suspected area

See page

Illumination light does not come on

1. ECU power source circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: ECU Power Source Circuit

2. Power source circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Power Source Circuit

3. Illumination circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: Illumination Circuit

4. Sub body ECU

-

5. Body ECU (Main)

-

Brighteness does not change even when rheostat is turned on (ALL)

1. Light control rheostat

2006 MY LX470 [05/2005 -        ]; METER: LIGHT CONTROL RHEOSTAT: ON-VEHICLE INSPECTION

2. Body ECU (Mian)

-

Door courtesy light does not come on

1. Door courtesy switch circuit

2006 MY LX470 [05/2005 -        ]; LIGHTING: FRONT DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

2. Body ECU (Main)

-

Fog light system

Symptom

Suspected area

See page

Fog light does not come on with light control switch HEAD (Headlight is normal)

1. FOG fuse

-

2. Fog light switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: FOG LIGHT ASSEMBLY: ADJUSTMENT

3. Engine room junction block relay circuit

-

4. Wire harness

-

Fog light does not come on with light control switch HEAD (Headlight does not normal)

1. Other parts*

-

2. Wire harness

-

Only one light does not come on

1. Bulb

-

2. Wire harness

-

Turn signal light and hazard warning light system

Symptom

Suspected area

See page

Hazard warning light and turn signal light do not come on

1. ECU-IG2 fuse

-

2. TURN HAZ fuse

-

3. Ignition switch

-

4. Turn signal flasher relay

2006 MY LX470 [05/2005 -        ]; LIGHTING: LIGHTING SYSTEM: ON-VEHICLE INSPECTION+

5. Wire harness

-

Hazard warning light does mot come on (turn is normal)

1. Hazard warning switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: HAZARD WARNING SWITCH: ON-VEHICLE INSPECTION

2. Wire harness

-

Turn signal light does not light up (hazard warning light is normal)

1. Turn signal switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: TURN SIGNAL LIGHT SWITCH: INSPECTION

2. Wire harness

-

Turn signal light does not light up in one direction

1. Turn signal switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: TURN SIGNAL LIGHT SWITCH: INSPECTION

2. Wire harness

-

Only one light does not light up

1. Bulb

-

2. Wire harness

-

Room light system

Symptom

Suspected area

See page

All light do not come on

1. DOME fuse

-

2. DOME relay

-

3. Body ECU (Main)

-

Light does not come on when driver door is opened

1. Driver door courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: FRONT DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

2. Wire harness side

-

Light does not come on when passenger door is opened

1. Passenger door courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: FRONT DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

2. Wire harness side

-

Light does not come on when rear-right door is opened

1. Rear-right door courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: REAR DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

2. Wire harness side

-

Light does not come on when rear-left door is opened

1. Rear-left door courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: REAR DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

2. Wire harness side

-

Only one of bulbs comes on

Bulb

-

Illumination does not fade out when all doors sre closed

1. Courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: FRONT DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

2. Wire harness

-

3. Body ECU (Main)

-

Illumination does not fade out immediately when ignition switch is turned to ACC or ON within 15 seconds after all doors are closed

1. ACC fuse

-

2. ECU-IG1 fuse

-

3. Ignition switch

-

4. Wire harness

-

5. Body ECU (Main)

-

Illumination does not fade out immediately when all doors are locked 15 seconds after they are closed

1. Door unlock detection switch

2006 MY LX470 [05/2005 -        ]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Door Unlock Detection Switch Circuit

2. Wire harness

-

Room light does not come on

1. Bulb

-

2. Room light

-

3. Rear personal light

2006 MY LX470 [05/2005 -        ]; LIGHTING: REAR ROOM LIGHT ASSEMBLY: ON-VEHICLE INSPECTION+

4. Wire harness

-

Front personal light does not come on

1. Bulb

-

2. front personal light

2006 MY LX470 [05/2005 -        ]; LIGHTING: PERSONAL LIGHT ASSEMBLY: ON-VEHICLE INSPECTION

3. Room light

2006 MY LX470 [05/2005 -        ]; LIGHTING: PERSONAL LIGHT ASSEMBLY: ON-VEHICLE INSPECTION

4. Wire harness

-

Rear room light does not come on

1. Bulb

-

2. Rear room light

2006 MY LX470 [05/2005 -        ]; LIGHTING: REAR ROOM LIGHT ASSEMBLY: ON-VEHICLE INSPECTION

3. Wire harness

-

Vanity light does not come on

1. Bulb

-

2. Vanity light

2006 MY LX470 [05/2005 -        ]; LIGHTING: VANITY LIGHT: INSPECTION

3. Wire harness

-

Glove compartment light does not come on

1. Bulb

-

2. Glove compartment courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: GLOVE BOX LIGHT: INSPECTION

3. Wire harness

-

Courtesy light does not come on

1. Bulb

-

2. Door courtesy switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: FRONT DOOR COURTESY SWITCH: ON-VEHICLE INSPECTION

3. Wire harness

-

Foot light does not come on

1. Wire harness

-

2. Bulb (LED)

-

3. Sub body ECU

-

4. Body ECU (Main)

-

Center console spot light does not come on

1. Wire harness

-

2. Bulb (LED)

-

3. Sub body ECU

-

Side step light and outer foot light does not come on

1. Wire harness

-

2. Bulb (LED)

-

3. Sub body ECU

-

4. Body ECU (Main)

-

Inside door handle illumination does not come on

1. Wire harness

-

2. Bulb (LED)

-

3. Sub body ECU

-

4. Body ECU (Main)

-

Back-up light system

Symptom

Suspected area

See page

Back-up light does not come on

1. GAUE 2 fuse

-

2. Bulb

-

3. Ignition switch

-

4. Wire harness

-

Back-up light does not come on

1. Park / neutral position switch

2006 MY LX470 [05/2005 -        ]; A750F AUTOMATIC TRANSMISSION: PARK / NEUTRAL POSITION SWITCH: COMPONENTS

2. Wire harness

-

Only one light does not come on

1. Bulb

-

2. Wire harness

-

Stop light system

Symptom

Suspected area

See page

Stop light does not come on

1. STOP fuse

-

2. Stop light switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: STOP LIGHT SWITCH: ON-VEHICLE INSPECTION

3. Wire harness

-

4. Sub body ECU

-

Stop light always come on

1. Stop light switch

2006 MY LX470 [05/2005 -        ]; LIGHTING: STOP LIGHT SWITCH: ON-VEHICLE INSPECTION

2. Wire harness

-

3. Sub body ECU

-

Only one light always come on

Wire harness

-

Only one light does not come on

1. Bulb

-

2. Wire harness

-