Terminals Of Ecu
WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU) Fig 1: Identifying Instrument Panel Junction Block (Multiplex Network Body ECU) Connector Terminal Identification
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Disconnect the multiplex network body ECU connector and instrument panel J/B connector.
- Check the voltage and resistance of each terminal of the wire harness side connector.
Standard
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BATB (IA-1) - Body ground B - Body ground +B (power battery system) power supply Always 10 to 14 V BECU (ID-10) - Body ground BE - Body ground +B power supply Always 10 to 14 V ALTB (ID-16) - Body ground G - Body ground +B (power generator system) power supply Always 10 to 14 V GND1 (IF-10) - Body ground W-B - Body ground Ground Always Below 1 Ω ACC (IA-1) - Body ground B - Body ground Ignition power supply (ACC signal) Ignition switch off → on (ACC) Below 1 V → 10 to 14 V IG (IA-1) - Body ground B - Body ground Ignition power supply (IG signal) Ignition switch off → on (IG) Below 1 V → 10 to 14 V GND2 (IM-9) - Body ground W - Body ground Ground Always Below 1 Ω LCTY (IO-7) - Body ground B - Body ground Rear door (LH) courtesy light switch signal Rear door (LH) is open → closed Below 1 Ω → 10 kΩ or higher PCTY (D6-23) - Body ground L - Body ground Passenger side door courtesy light switch signal Passenger side door is open → closed Below 1 Ω → 10 kΩ or higher LGCY (D6-25) - Body ground V - Body ground Luggage compartment light (Luggage compartment door courtesy light switch) signal Luggage compartment light is ON → OFF (Luggage compartment door is open (unlocked) → closed (locked)) Below 1 Ω → 10 kΩ or higher KSW* (D7-21) - Body ground BR - Body ground Unlock warning switch signal Ignition key is inserted → not inserted Below 1 Ω → 10 kΩ or higher DCTY (D8-14) - Body ground G - Body ground Driver side door courtesy light switch signal Driver side door is open → closed Below 1 Ω → 10 kΩ or higher RCTY (D8-16) - Body ground GR - Body ground Rear door (RH) courtesy light switch signal Rear door (RH) is open → closed Below 1 Ω → 10 kΩ or higher HINT:
*: without Smart Key System
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the multiplex network body ECU connector and instrument panel J/B connector.
- Check the voltage of each terminal of the ECU side connector.
Voltage
Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition TR+ (D7-1) - Body ground L - Body ground Luggage compartment door opener motor signal Luggage compartment door is closed (locked) → open (unlocked) Below 1 V → 10 to 14 V (*1) HAZ (D7-2) - Body ground P - Body ground Turn signal flasher relay signal Any transmitter switch is pressed → not pressed Below 1 V → 10 to 14 V (*2) If the result is not as specified, the multiplex network body ECU may have a malfunction.
(*1): When operating the motor.
(*2): When operating the answer back function.