Terminals Of Ecu
- INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU)
- Disconnect the B6, B7 and B9 ECU connectors.
- Disconnect the 1A, 1C, 1K, 1L and 1P J/B connectors.
- Check the voltage or resistance according to the value(s) in the table below (wire harness side connector).TESTER DESCRIPTION SPECIFIED CONDITION CHART
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition IG (1A-1) - Body ground W - Body ground +B (power system, generator system) power supply Always 10 to 14 V ACC (1A-1) - Body ground W - Body ground +B (power system, generator system) power supply Always 10 to 14 V BECU (1C-24) - Body ground W-L - Body ground +B (BECU) power supply Always 10 to 14 V ALTB (1C-30) - Body ground B - Body ground +B (power system, generator system) power supply Always 10 to 14 V GND1 (1L-16) - Body ground W-B - Body ground Ground Always Below 1 Ω GND2 (1K-17) - Body ground W-B - Body ground Ground Always Below 1 Ω LCTY (1P-19) - Body ground GR - Body ground Rear courtesy light switch LH input Rear door LH closed → opened 10 kΩ or higher → Below 1Ω KSW (B6-21) - Body ground L-B - Body ground Unlock warning switch input No key in ignition key cylinder → key inserted 10 kΩ or higher → Below 1Ω PCTY (B7-23) - Body ground R-Y - Body ground Passenger side courtesy light switch input Passenger side door closed → opened 10 kΩ or higher → Below 1Ω BCTY (B7-25) - Body ground G-W - Body ground Back door courtesy light switch input Back door closed → opened 10 kΩ or higher → Below 1Ω DCTY (B9-14) - Body ground R-Y - Body ground Driver side courtesy light switch input Driver side door closed → opened 10 kΩ or higher → Below 1Ω RCTY (B9-16) - Body ground R-W - Body ground Rear courtesy light switch RH input Rear door RH closed → opened 10 kΩ or higher → Below 1Ω HINT:
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 1 A, 1C, 1K, 1L and 1P J/B connectors.
- Check the voltage according to the value(s) in the table below (ECU side connector).TERMINALS VOLTAGE CHART
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition HAZ (B6-2) - Body ground G-O - Body ground Hazard warning light signal Answer-back OFF → answer-back ON Below 1 V → Pulse generation BZR (B8-2) - Body ground G - Body ground Wireless door lock buzzer Wireless door lock buzzer OFF → ON Below 1 V → Pulse generation RDA (B9-12) - Body ground P-L - 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.