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 AIR CONDITIONING AMPLIFIER ASSEMBLY (A/C CONTROL ASSEMBLY)Β
- Disconnect the A10 ECU connector.
- Measure the resistance and voltage of the wire harness side connector.ECU CONNECTOR TERMINAL SPECIFIED CONDITION
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition IG (A10-1) - Body ground V-W - Body ground Ignition (power supply) Ignition switch ON 10 to 14 V +B (A10-8) - Body ground W-R - Body ground Battery (power supply) Always 10 to 14 V GND (A10-14) - Body ground W-B - Body ground Ground Always Below 1 Ξ© If the result is not as specified, there may be a malfunction on the wire harness side.
- CHECK LUGGAGE ROOM JUNCTION BLOCK (LUGGAGE ROOM JUNCTION BLOCK ECU)Β
Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the 6A, 6F and 6L junction block connectors.
- Disconnect the L24 ECU connector.
- Measure the resistance and voltage of the wire harness side connectors.ECU CONNECTOR TERMINAL SPECIFIED CONDITION
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition MPX-IG (6F-13) - Body ground V-W - Body ground Ignition power supply Ignition switch ON 10 to 14 V MPX-B (6F-12) - Body ground L-B - Body ground +B power supply Always 10 to 14 V P-GND (6A-2) - Body ground W-B - Body ground Ground Always Below 1 Ξ© SG (L24-5) - Body ground W-B - Body ground Ground Always Below 1 Ξ© DEF (6L-1) - Body ground W-R - Body ground +B power supply Always 10 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.
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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.
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