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.
Determining Open Circuit Location (HS-Can) [Multiplex Communication System]: Notes
2011 Mazda RX-8 Sport, 1.3 2SECTION Notes
CAUTION:
- If the malfunctioning part is detected in the communication line, before disconnecting the related connector for inspection, press the connector in the connection direction to verify that there is no looseness or disconnection.
- When disconnecting the connector, verify that there is no damage, deformation, or corrosion of the connector terminals.
- Verify the CAN system-related module DTCs and the failed module on the M-MDS screen.
- Refer to "DTC OUTPUT PATTERN AND MALFUNCTIONING PART " and find the area linked from the malfunctioning part.NOTE:
- A hyphen (-) in the DTC output pattern cell indicates that the DTC may be displayed depending on the malfunction detection conditions. If it is not displayed, the malfunctioning part can be determined by checking only the crosses (x.)
- If any of the following DTCs is displayed alone, perform the applicable DTC inspection. (See DTC TABLE [MULTIPLEX COMMUNICATION SYSTEM] .)
- Instrument cluster: U1900
- EPS control module: U1900
- DSC HU/CM: U1900
- Keyless control module: U1147, U2510
- Steering angle sensor: U1900
- Inspect the possible cause and inspection item of the applicable malfunctioning part.
- Perform the DTC inspection after the repair procedure.
- If any DTC is displayed, return to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] .
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.