Terminals Of Ecu

INSTRUMENT PANEL JUNCTION BLOCK (MULTIPLEX NETWORK BODY ECU)

Fig 1: Identifying Instrument Panel Junction Block (Multiplex Network Body ECU) ECU Terminals

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:

MULTIPLEX NETWORK BODY ECU (1 OF 2)

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	O - Body ground	+B power supply	Always	10 to 14 V
ALTB (ID-16) - Body ground	W - 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 (II-3) - Body ground	GR - Body ground	Ignition power supply (ACC signal)	Ignition switch off --> on (ACC)	Below 1 V --> 10 to 14 V
IG (II-9) - Body ground	G - 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-B - 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	B - Body ground	Unlock warning switch signal	Ignition key is inserted --> not inserted	Below 1 Ω --> 10 kΩ or higher
DCTY (D8-14) - Body ground	L - 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

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.

Standard:

MULTIPLEX NETWORK BODY ECU (2 OF 2)

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

TR+ (D7-1) - Body ground

B - 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⁾

⁽¹⁾	When operating the motor.

⁽²⁾	When operating the answer back function.

If the result is not as specified, the multiplex network body ECU may have a malfunction.