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 214 (AUTOMATIC HEADLIGHTS & LIGHTING SYSTEMS)CIRCUIT TESTSHEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT
2004 Toyota Matrix XR, FWD, Standard
Headlight Beam Level Control Ecu Circuit
2004 Toyota Matrix XR, FWD, StandardSECTION Headlight Beam Level Control Ecu Circuit
WARNING: This page is about a different car, the 2003 Lexus IS 300 and 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
- Connector Disconnected -
Disconnect the connector from the ECU and inspect the connector on the wiring harness side. See CONNECTOR IDENTIFICATION . See INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR DISCONNECTED) table. If the circuit is not as specified, go to step 2.INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR DISCONNECTED)
Tester Connection Condition Specified Condition 1 - 13 Ignition Switch OFF 26 - 30 Ohms 1 - 15 Ignition Switch OFF 26 - 30 Ohms 1 - 14 Ignition Switch OFF 26 - 30 Ohms 1 - 16 Ignition Switch OFF 26 - 30 Ohms 1 - 4 Ignition Switch OFF 26 - 30 Ohms 1 - 2 Ignition Switch OFF 26 - 30 Ohms 1 - 12 Ignition Switch OFF 26 - 30 Ohms 1 - 3 Ignition Switch OFF 26 - 30 Ohms 6 - 10 Ignition Switch OFF Continuity 7 - 11 Ignition Switch OFF Continuity 10 - 17 Ignition Switch OFF Continuity 5 - 11 Ignition Switch OFF Continuity 20 - Ground Ignition Switch OFF Continuity - Connector Connected -
Connect the connector from the ECU and inspect the connector on the back side. See CONNECTOR IDENTIFICATION . See INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR CONNECTED) table. If the circuit is not as specified, replace the ECU. See HEADLIGHTS under REMOVAL & INSTALLATION.INSPECTING HEADLIGHT BEAM LEVEL CONTROL ECU CIRCUIT (CONNECTOR CONNECTED)
Tester Connection Condition Specified Condition 1 - 20 Ignition Switch ON B+ Voltage 13 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 15 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 14 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 16 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 10 - 17 Ignition Switch ON Approx. 2.5 Volts 18 - 20 Ignition Switch ON No Continuity 4 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 2 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 12 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 3 - 20 Ignition Switch ON, When Keep & Bounce The Vehicle 1 Pulse Generation (1) 5 - 11 Ignition Switch ON Approx. 2.5 Volts 11 - 20 Ignition Switch OFF Continuity 10 - 17 Ignition Switch OFF Continuity 6 - 10 Ignition Switch ON 5 Volts 7 - 11 Ignition Switch ON 5 Volts 10 - 20 Ignition Switch OFF Continuity 20 - Body Ground Ignition Switch OFF Continuity (1) See Fig 1.
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.