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 634 (MULTIPLEX COMMUNICATION SYSTEM - DIAGNOSTICS)TERMINALS OF ECU
2004 Toyota Matrix XR, FWD, Standard
Terminals Of Ecu
2004 Toyota Matrix XR, FWD, StandardSECTION Terminals Of Ecu
WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (BODY ECU) (REAR SIDE)Β
Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the 2B, 2F and 2G instrument panel J/B connectors, and check the continuity and voltage of each terminal of the disconnected connectors.
Standard:Β
TERMINAL SPECIFICATIONSymbols (Terminal No.) Wiring color Condition Specified condition SGND (2B-11) <--> Body ground BR <-->- Constant Continuity GND (2R-8(1), 2D-3(2)) <--> Body ground W-B<-->- Constant Continuity BDR1 (2G-14) <--> Body ground L-W <-->- Constant 10 - 14 V B (2F-7) <-->Body ground R <-->- Constant 10 - 14 V (1) : The check should be performed by using the 2D connector*2 , because the 2R connector*1 is unavailable for this check. (2) : The check should be performed by using the 2D connector*2 , because the 2R connector*1 is unavailable for this check. NOTE: If the result is not as specified, there may be a malfunction on the wire harness side.
- Disconnect the 2B, 2F and 2G instrument panel J/B connectors, and check the continuity and voltage of each terminal of the disconnected connectors.
- CHECK THEFT WARNING ECU (THEFT DETERRENT ECU)Β
Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the T5 theft warning ECU (theft deterrent ECU) connector and check the voltage and continuity of each terminal of the wire harness side connector.
Standard:Β
TERMINALS SPECIFICATIONSymbols (Terminal No.) Wiring color Condition Specified condition E (T5-11) <-->Body ground W-B <-->- Constant Continuity +B1 (T5-2) <-->E (T5-11) W-R <-->W-B Constant 10 - 14 V If the result is not as specified, there may be a malfunction on the wire harness side.
- Disconnect the T5 theft warning ECU (theft deterrent ECU) connector and check the voltage and continuity of each terminal of the wire harness side connector.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.