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 734 (AUDIO SYSTEM - DIAGNOSIS)PRESSING POWER SWITCH DOES NOT START SYSTEMINSPECTION 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 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT RADIO RECEIVER ASSY (+B, ACC, GND)
1. Check that the continuity between terminals at each condition, as shown in Fig 1 .
  Standard:
  
  Fig 1: Checking Continuity Between Terminals +B, ACC & GND
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check that the voltage between terminals at each condition, as shown in Fig 2 .
  Standard:
  
  Fig 2: Checking Voltage Between Terminals +B, ACC & GND
  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.