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 MANUALSLEXUS1994SC 300 L6-3.0L (2JZ-GE)REPAIR AND DIAGNOSISDIAGRAMSELECTRICAL DIAGRAMSHEADLAMPHEADLAMP CONTROL MODULESERVICE HINTSLIGHT AUTO TURN OFF
1994 Lexus SC 300 L6-3.0L (2JZ-GE)
Light Auto Turn Off
1994 Lexus SC 300 L6-3.0L (2JZ-GE)SECTION Light Auto Turn Off
HEADLIGHT RELAY
1-2: Closed with light control SW at Head position or Dimmer SW at Flash position
TAILLIGHT RELAY
5-3: Closed with light control SW at Tail or Head position
I16(A)(B) INTEGRATION RELAY
7-Ground: Approx. 12 volts with Ignition SW at ON position
6-Ground: Continuity with Door LH open
(A)5, (B)11-Ground: Always Approx. 12 Volts
(A)6, (B)12-Ground: Always Approx. 12 Volts
(A)7, (B)13-Ground: Continuity with light control SW at Head position
(A)4, (B)10-Ground: Continuity with light control SW at Tail or Headposition
D16 DOOR OPEN DETECTION SW LH
3-6: Closed with driver's Door open
1-2: Closed with light control SW at Head position or Dimmer SW at Flash position
TAILLIGHT RELAY
5-3: Closed with light control SW at Tail or Head position
I16(A)(B) INTEGRATION RELAY
7-Ground: Approx. 12 volts with Ignition SW at ON position
6-Ground: Continuity with Door LH open
(A)5, (B)11-Ground: Always Approx. 12 Volts
(A)6, (B)12-Ground: Always Approx. 12 Volts
(A)7, (B)13-Ground: Continuity with light control SW at Head position
(A)4, (B)10-Ground: Continuity with light control SW at Tail or Headposition
D16 DOOR OPEN DETECTION SW LH
3-6: Closed with driver's Door open
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.