Terminals Of Ecu
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- CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSY (MULTIPLEX NETWORK BODY ECU)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the B6, B7 and B9 ECU connectors.
- Disconnect the 1A, 1C, 1K,1L and 1P J/B connectors.
- Check the voltage and resistance between each terminal of the wire harness side connectors and body ground.
Standard:
TERMINAL SPECIFIED CONDITIONSymbols (Terminal No.) Wiring Color Condition Specified Condition IG (1A-1) - Body ground W - Body ground Constant 10 to 14 V ACC (1A-1) - Body ground W - Body ground Constant 10 to 14 V BECU (1C-24) - Body ground W-L - Body ground Constant 10 to 14 V ALTB (1C-30) - Body ground B - Body ground Constant 10 to 14 V KSW (B6-21) - Body ground L-B - Body ground No key in ignition key cylinder -->Key inserted 10 kΩ or higher --> Below 1 Ω DCTY (B9-14) - Body ground R-Y - Body ground Driver side door CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω PCTY (B7-23) - Body ground R-Y - Body ground Passenger side door CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω RCTY (B9-16) - Body ground R-W - Body ground Rear door RH CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω LCTY (1P-19) - Body ground GR - Body ground Rear door LH CLOSED --> OPEN 10 kΩ or higher --> Below 1 Ω BCTY (B7-25) - Body ground G-W - Body ground Back door CLOSED -->OPEN 10 kΩ or higher --> Below 1 Ω GND1 (1L-16) - Body ground W-B - Body ground Constant Below 1 Ω GND2 (1K-17) - Body ground W-B - Body ground Constant Below 1 Ω If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the B6, B7 and B9 ECU connectors.
- Reconnect the 1A, 1C, 1K,1L and 1P J/B connectors.
- Check the voltage between each terminal of the connectors and the body ground.
Standard:
TERMINAL SPECIFIED CONDITIONSymbols (Terminal No.) Wiring Color Condition Specified Condition HAZ (B6-2) - Body ground G-O - Body ground Answer-back OFF --> Answer-back ON Below 1 V --> Pulse generation BZR (B8-2) - Body ground G - Body ground Wireless buzzer OFF --> ON Below 1 V --> Pulse generation RDA (B9-12) - Body ground P-L - Body ground No key in ignition key cylinder, all doors closed and transmitter switch OFF --> ON Below 1 V --> Approx. 6 to 7 V --> Below 1 V If the result is not as specified, the J/B assy (body ECU) may have a malfunction.