Terminals Of Ecu
- CHECK INSTRUMENT PANEL J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)
- Disconnect the B4, B5, B6 and B7 ECU connectors.
- Disconnect the 1 A, 1D, 1F and 1O J/B connectors.
- Measure the voltage and resistance between each terminal of the wire harness side connectors and body ground.TERMINAL DESCRIPTION SPECIFIED CONDITION CHART
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition IG (1A-1) - Body ground B - Body ground Ignition power supply Always 10 to 14 V BECU (1D-10) - Body ground W - Body ground +B (BECU) 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 KSW (B4-21) - Body ground B - Body ground Key unlock warning switch input No key in ignition key cylinder (OFF) → Key inserted (ON) 10 kΩ or higher → Below 1 Ω PCTY (B5-23) - Body ground L - Body ground Passenger side courtesy switch Passenger side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω BCTY (B5-25) - Body ground P - Body ground Back door courtesy switch Back door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω DCTY (B6-14) - Body ground L - Body ground Driver side courtesy switch Driver side door CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω RCTY (B6-16) - Body ground GR - Body ground Rear RH courtesy switch Rear door RH CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω HCTY (B7-10) - Body ground R - Body ground Engine hood courtesy switch Engine hood CLOSED (OFF) → OPEN (ON) 10 kΩ or higher → Below 1 Ω If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the B4, B5, B6 and B7 ECU connectors.
- Reconnect the 1A, 1D, 1F, 1M and 10 J/B connectors.
- Measure the voltage between each terminal of the connectors and the body ground.TERMINAL DESCRIPTION SPECIFIED CONDITION CHART
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition HORN (1D-11) - Body ground R - Body ground Vehicle horn drive Vehicle horn is sounding (Theft deterrent system is in alarm sounding state) Pulse generation (0V← →12V) HAZ (B4-2) - Body ground Y - Body ground Hazard warning light drive Answer-back OFF → Answer-back ON Below 1V → Pulse generation IND (B4-24) - Body ground W - Body ground Security indicator output Security indicator lights up (It lights up only for 30 sec. in alarm sounding state. It flashes when immobilizer system is operating.) 3 to 6 V SH (B7-1) - Body ground G - Body ground Security horn drive Security horn is sounding (Theft deterrent system is in alarm sounding state) Pulse generation (0V← →12V) If the result is not as specified, the J/B assy. (Body ECU) may have a malfunction.