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 693 (LIGHTING SYSTEM - DIAGNOSTICS)TAIL RELAY 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 2004 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RELAY
1. Inspect TAIL relay continuity.
  
  Fig 1: Inspecting Tail Relay Continuity
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Measure the resistance according to the value(s) in Fig 2 .
  Standard:
  
  Fig 2: Measuring Resistance Specifications Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE RELAY
2. OK: Go to Next Step.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY (POWER SOURCE CIRCUIT)

Disconnect the 2A connector from the instrument panel junction block assy.

Measure the voltage according to the value(s) in SPECIFIED CONDITION .

Standard:

SPECIFIED CONDITION

Tester connection	Condition	Specified condition
2A-1 - Body ground	Always	10 to 14 V

Fig 3: Disconnecting 2A Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - INSTRUMENT PANEL JUNCTION BLOCK ASSY)
OK: Go to Next Step.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY
1. Measure the voltage according to the value(s) in Fig 4 .
  Standard:
  
  Fig 4: Measuring Voltage Specifications Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.