Terminals Of Ecu
WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU)
- Disconnect the instrument panel J/B and multiplex network body ECU connectors.
- Check the voltage or resistance according to the value(s) in the table below (wire harness side connector).INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU) VOLTAGE OR RESISTANCE
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BATB (1A-1) - Body ground W*1 - Body ground +B (power system, generator system) power supply Always 10 to 14 V BATB (1A-1) - Body ground B*2 - Body ground +B (power system, generator system) power supply Always 10 to 14 V BECU (1D-10) - Body ground L-B - Body ground +B (BECU) power supply Always 10 to 14 V ALTB (1D-16) - Body ground W - Body ground +B (power system, generator system) power supply Always 10 to 14 V GND1 (1F-10) - Body ground W-B - Body ground Ground Always Below 1 Ω GND2 (1M-9) - Body ground W-B - Body ground Ground Always Below 1 Ω LCTY (1O-7) - Body ground B - Body ground Rear courtesy light switch LH input Rear door LH closed → opened 10 kΩ or higher → Below 1 Ω KSW (B4-21) - Body ground B - Body ground Unlock warning switch input No key in ignition key cylinder → key inserted 10 kΩ or higher → Below 1 Ω PCTY (B5-23) - Body ground L - Body ground Passenger side courtesy light switch input Passenger side door closed → opened 10 kΩ or higher → Below 1 Ω BCTY (B5-25) - Body ground P - Body ground Back door courtesy light switch input Back door closed → opened 10 kΩ or higher → Below 1 Ω DCTY (B6-14) - Body ground L - Body ground Driver side courtesy light switch input Driver side door closed → opened 10 kΩ or higher → Below 1 Ω RCTY (B6-16) - Body ground GR - Body ground Rear courtesy light switch RH input Rear door RH closed → opened 10 kΩ or higher → Below 1 Ω HINT: - *1 : with Air suspension system
- *2 : without Air suspension system
- If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the instrument panel J/B and multiplex network body ECU connectors.
- Check the voltage according to the value(s) in the table below (ECU side connector).INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU) VOLTAGE
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition HAZ (B4-2) - Body ground SB - Body ground Hazard warning light signal Answer-back OFF → answer-back ON 10 to 14 V → Pulse generation KSW (B4-21) - Body ground B - Body ground Unlock warning switch input No key in the ignition key cylinder → key inserted 10 to 14 V → 0 V BZR (B7-2) - Body ground W - Body ground Wireless door lock buzzer Wireless door lock buzzer OFF → ON 0 V → Pulse generation RDA (B6-12) - Body ground LG - Body ground Door control receiver input No key in ignition key cylinder, all doors closed and transmitter switch OFF → ON Below 1 V → Approx. 6 to 7 → Below 1 V If the result is not as specified, the instrument panel J/B (multiplex network body ECU) may have a malfunction.