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.
Terminals Of Ecu
- CHECK TRANSPONDER KEY AMPLIFIER
- Disconnect the I14 amplifier connector.
- Measure the resistance of the wire harness side connector.
Standard:
TERMINAL SPECIFIED CONDITIONSymbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (I14-7) - Body ground BR-R *1 - Body ground Ground Always Below 1 Ω GND (I14-7) - Body ground BR *2 - Body ground Ground Always Below 1 Ω If the result is not as specified, there may be a malfunction on the wire harness side.
*1: Coupe
*2: Convertible
- Reconnect the I14 amplifier connector.
- Measure the resistance and voltage of the connector.
Standard:
If the result is not as specified, there may be a malfunction on the amplifier.
- Inspect using an oscilloscope.
Waveform 1 (Reference):
Waveform 2 (Reference):
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.