Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Camry Solara. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INSTRUMENT PANEL J/B ASSEMBLY (MULTIPLEX NETWORK BODY ECU)

Disconnect the B6, B7, B8 and B9 ECU connectors.

Fig 1: Identifying B6, B7, B8 And B9 ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Disconnect the 2A, 2C, 2F and 2K J/B connectors.

Measure the voltage and resistance of the wire harness side connectors.

STANDARD RESISTANCE SPECIFICATION

Symbols (Terminal No.)

Wiring Color

Terminal Description

Condition

Specified Condition

IG (2A-1) - Body ground

B-G - Body ground

Ignition power supply

Ignition switch
1: OFF →
2: ON

1: 0V
2:10 to 14 V

ACC (2A-1) - Body ground

B-G - Body ground

Ignition power supply

Ignition switch
1: OFF →
2: ACC

1: 0V
2: 10 to 14 V

BECU (2F-7) - Body ground

W-R - Body ground

+B (BECU) power supply

Always

10 to 14 V

ALTB (2C-30) - Body ground

L-W - Body ground

+B (power system, generator system) power supply

Always

10 to 14 V

KSW (B6-21) - Body ground

L - Body ground

Key unlock warning switch input

1: No key in ignition key cylinder →
2: Key inserted

1: 10 kΩ or higher →
2: Below 1 Ω

DCTY (B8-14) - Body ground

R-G - Body ground

Driver side courtesy switch input

Driver side door
1: Closed →
2: Open

1: 10 kΩ or higher →
2: Below 1 Ω

PCTY (B7-23) - Body ground

R-G - Body ground

Passenger side courtesy switch input

Passenger side door
1: Closed →
2: Open

1: 10 kΩ or higher →
2: Below 1 Ω

LGCY (B7-25) - Body ground

G-R⁽¹⁾ - Body ground

Luggage compartment door courtesy switch input

Luggage compartment door
1: Closed →
2: Open

1: 10 kΩ or higher →
2: Below 1 Ω

LGCY (B7-25) - Body ground

R⁽²⁾ - Body ground

Luggage compartment door courtesy switch input

Luggage compartment door
1: Closed →
2: Open

1: 10 kΩ or higher →
2: Below 1 Ω

GND1 (2F-16) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

GND2 (2K-17) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

⁽¹⁾

Coupe

⁽²⁾	Convertible

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the B6, B7, B8 and B9 ECU connectors.
Reconnect the 2A, 2C, 2F and 2K J/B connectors.

Measure the voltage of the connectors.

STANDARD VOLTAGE SPECIFICATION

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
HAZ (B6-2) - Body ground	LG - Body ground	Hazard light drive	Answer-Luggage compartment 1: OFF → 2: ON	1: 10 to 14 V → 2: Pulse generation
BZR (B9-2) - Body ground	L - Body ground	Wireless door lock buzzer	Wireless door lock buzzer 1: OFF → 2: ACC	1: 0V → 2: Pulse generation
RDA (B8-12) - Body ground	L-W - Body ground	Door control receiver input	Each transmitter switch 1: OFF → 2: ON (No key in ignition key cylinder and all doors closed)	1: Below 1V → 2: Alternating 6 to 7 V and below 1 V

If the result is not as specified, there may be a malfunction on the J/B assembly (multiplex network body ECU).