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 777 (MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSIS)DIAGNOSTIC TROUBLE CODE TABLE
2004 Toyota Matrix XR, FWD, Standard
Diagnostic Trouble Code Table
2004 Toyota Matrix XR, FWD, StandardSECTION Diagnostic Trouble Code Table
WARNING: This page is about a different car, the 2004 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
If a malfunction code is displayed during the DTC check, check the circuit listed for that code in DIAGNOSTIC TROUBLE CODE TABLE .
DIAGNOSTIC TROUBLE CODE TABLE
| DTC | Description |
|---|---|
| DTC B1211/11 | Power window master switch ECU communication stop |
| DTC B1214/14, B1215/15 | Communication bus malfunction (+B short)/(GND short) |
| DTC B1241/41 | Body ECU switch circuit diagnosis |
| DTC B1242/42 | Wireless door lock tuner circuit malfunction |
| DTC B1244/44 | Light sensor circuit malfunction |
| DTC B1261/61 | ECM communication stop |
| DTC B1262/62 | A/C ECU communication stop |
| DTC B1269/69 | Theft deterrent ECU communication stop |
| DTC B1271/71 | Combinations meter ECU communication stop |
HINT:
- DTC 71 are not output through open door warning light on meter because of system itself.
- When some of the DTC 14, 15 first. The following shows DTCs which are output In this case, please repair DTC 14, 15 first, The following shows DTCs which are output when +B or GND short occurs on communication bus.
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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.