Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2011LANDCRUISER V8-5.7L (3UR-FE)REPAIR AND DIAGNOSISLIGHTING AND HORNSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSLIGHT CONTROL SWITCH CIRCUIT
2011 Toyota Landcruiser V8-5.7L (3UR-FE)
Light Control Switch Circuit
2011 Toyota Landcruiser V8-5.7L (3UR-FE)SECTION Light Control Switch Circuit
LIGHTING (EXT): LIGHTING SYSTEM: Light Control Switch Circuit
- Light Control Switch Circuit
DESCRIPTION
The main body ECU receives light control switch, dimmer switch and front fog light switch information signals from the headlight dimmer switch.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. READ VALUE USING TECHSTREAM (HEADLIGHT DIMMER SWITCH)
(a) Operate the Techstream according to the display and select the "Data List".
Main Body
OK:
When headlight dimmer switch operation is performed, the result will be the same as above.
NG -- INSPECT HEADLIGHT DIMMER SWITCH
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures
2. INSPECT HEADLIGHT DIMMER SWITCH
(a) Remove the headlight dimmer switch Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Removal
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH - MAIN BODY ECU AND BODY GROUND)
(a) Disconnect the E14 switch connector.
(b) Disconnect the E1, E2 and 2D ECU connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU
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.