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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 226 (ANTI-LOCK BRAKE SYSTEM)DIAGNOSTIC TESTSDTC C1241/ 41: IG POWER SOURCE CIRCUITDIAGNOSTIC PROCEDURE
2004 Toyota Matrix XR, FWD, Standard

Diagnostic Procedure

2004 Toyota Matrix XR, FWD, StandardSECTION Diagnostic Procedure
WARNING: This page is about a different car, the 2003 Toyota Tundra, 2002 Toyota Tundra, and 2001 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove and inspect ECU-IG fuse from underdash fuse block. If fuse is blown, check for short circuit in all wiring and components connected to ECU-IG fuse. See WIRING DIAGRAMS . Repair as necessary. If fuse is okay, go to next step.
  2. Ensure battery and charging system are okay. If voltage at battery is 10-14 volts, go to next step. If voltage is not 10-14 volts, repair charging system. Ensure system fuses are okay.
    3. NOTE: In case of not using hand-held tester, "NORMAL" is displayed.
  3. Connect hand held tester to DLC3. Turn ignition to ON position and push hand-held tester main switch ON. Select DATA LIST mode on tester. Check voltage condition output from ECU displayed on tester. Turn ignition OFF. Disconnect ABS ECU connector. Turn ignition switch to ON position and measure voltage between terminalsIG1 and GND of ABS ECU wiring harness side connector. See ABS ECU PIN VOLTAGES . Voltage should be 10-14 volts. If voltage is not as specified, check and/or replace ABS actuator assembly.
  4. If voltage is OK, measure resistance between terminal GND of ABS ECU wiring harness side connector and body ground. See ABS ECU PIN VOLTAGES . Resistance should be one megohm or less. If it is not, repair or replace wiring harness connector. If resistance is okay, check for open circuit in wiring harness or connector between ABS ECU and battery.
RENDER: 1.0x

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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.