Terminals Of Ecu
- CHECK MAIN BODY ECU
- Disconnect the 1B, 1E, 1F, 1L and E6 main body ECU connectors.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Measure the voltage of the wire harness side connectors.
Standard voltage:
MAIN BODY ECUSymbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition BECU (1B-4) - Body ground W-R - Body ground Power source (+B) Always 11 to 14 V BECU (1L-4) - Body ground W-R - Body ground Power source (+B) Always 11 to 14 V BECU (1F-12) - Body ground W-R - Body ground Power source (+B) Always 11 to 14 V BDR1 (1E-9) - Body ground B-Y - Body ground Power source (+B) Always 11 to 14 V MPX2 (E6-23) - Body ground BR-R - Body ground Multiplex communication signal During communication Signal waveform If the result is not as specified, there may be a malfunction on the wire harness side.
- Disconnect the 1B, 1E, 1F, 1L and E6 main body ECU connectors.
- CHECK BACK DOOR ECU
- Disconnect the S2 ECU connector.
- Measure the voltage of the wire harness side connector.
Standard voltage:
BACK DOOR ECUSymbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition GND (S2-3) - Body ground W-B - Body ground Ground for main power supply Ground for main power supply Below 1 V BECU (S2-5) - GND (S2-3) W-R - W-B Power source (+B) Always 11 to 14 V BDR (S2-4) - GND (S2-3) L-0 - W-B Power source (+B) Always 11 to 14V MPX2 (S2-1) - Body ground BR-R - Body ground Multiplex communication signal During communication Signal waveform SIG (S2-6) - Body ground B-R - Body ground Power source (IG) Ignition switch ON 11 to 14 V If the result is not as specified, there may be a malfunction on the wire harness side.