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 MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 599 (LIGHTING SYSTEM - DIAGNOSIS)DOOR COURTESY LIGHT AND COURTESY SWITCH CIRCUITINSPECTION PROCEDURE
2004 Toyota Matrix XR, FWD, Standard
Inspection Procedure
2004 Toyota Matrix XR, FWD, StandardSECTION Inspection Procedure
WARNING: This page is about a different car, the 2002 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE OF OBD II SCAN TOOL OR LEXUS HAND-HELD TESTER
- Connect the LEXUS hand-held tester to DLC 3.
- Check the door courtesy switch using DATA LIST.
Driver Door ECU:
Driver Door ECU INSPECTIONDescription Tester display Check condition Courtesy switch COURTESY SW ON - OFF Passenger Door ECU:
PASSENGER DOOR ECU INSPECTIONDescription Tester display Check condition Courtesy switch COURTESY SW ON - OFF - OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOM TABLE, SEE PROBLEM SYMPTOMS TABLE .
- NG: GO TO NEXT STEP.
- INSPECT COURTESY LAMP ASSEMBLY
- Check that the door courtesy light comes on when the door is open, and goes off when closed.
OK:
MUST BE OPERATED NORMALLY.
- OK: REPLACE COURTESY LAMP ASSEMBLY
- NG: GO TO NEXT STEP.
- Check that the door courtesy light comes on when the door is open, and goes off when closed.
- INSPECT FRONT DOOR COURTESY LAMP SWITCH ASSEMBLY
- Inspect door courtesy switch continuity.
- Check that the continuity exists between terminals 1 and body ground, when switch is operated.
Standard:
ON (when shaft is pressed): No continuity
OFF (when shaft is not pressed): Continuity
- NG: REPLACE FRONT DOOR COURTESY LAMP SWITCH ASSEMBLY
- OK: GO TO NEXT STEP.
- Inspect door courtesy switch continuity.
- CHECK HARNESS AND CONNECTOR
- Inspect the harness and connectors related to each light or switch, referring to the wiring diagram.
- NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
- OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOM TABLE, see PROBLEM SYMPTOMS TABLE .
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.