Terminals Of Ecu

CHECK DOOR CONTROL RELAY ASSEMBLY

Fig 1: Checking Door Control Relay ECU Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the D3 relay connector.

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

WIRING COLOR TERMINAL DESCRIPTION

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
B (D3-14) - Body ground	L-O - Body ground	+B (B) power supply	Always	10 to 14 V
E (D3 - 25) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
IG (D3-3) - Body ground	R-B - Body ground	Ignition power supply	Ignition switch ON	10 to 14 V
DCTY (D3-18) - Body ground	R-W - Body ground	Driver side courtesy switch input	Driver side door CLOSED --> OPEN	10 kΩ or higher --> Below 1 Ω
L1 (D3-7) - Body ground	BR-W - Body ground	Door control switch (master switch and passenger side switch) lock input	Door control switch (master switch or passenger side switch) OFF --> LOCK	10 kΩ or higher --> Below 1 Ω
UL1 (D3-8) - Body ground	G-W - Body ground	Door control switch (master switch and passenger side switch) unlock input	Door control switch (master switch or passenger side switch) OFF --> UNLOCK	10 kΩ or higher --> Below 1 Ω
LSWD (D3-5) - Body ground	L-R - Body ground	Driver side door lock position switch input	Driver side door UNLOCK --> LOCK	10 kΩ or higher --> Below 1 Ω
L2 (D3-9) - Body ground	BR-Y - Body ground	Driver and passenger side door key linked door lock input	Driver or passenger side door key cylinder OFF --> LOCK	10 kΩ or higher --> Below 1 Ω
UL3 (D3-10) - Body ground	Y-B - Body ground	Driver side door key linked door unlock input	Driver side door key cylinder OFF --> UNLOCK	10 kΩ or higher --> Below 1 Ω
UL2 (D3-11) - Body ground	G-B - Body ground	Passenger side door key linked door unlock input	Passenger side door key cylinder OFF --> UNLOCK	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 D3 relay connector.

Measure the voltage of the connector.

WIRING COLOR TERMINAL DESCRIPTION

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
ACT+ (D3-1) - Body ground	L-W - Body ground	Door lock motor LOCK drive output (driver, passenger, rear LH, rear RH and back doors)	Door control switch (master switch or passenger side switch) or door key cylinder (driver or 'passenger) OFF --> LOCK --> OFF	Below 1 V --> 10 to 14 V --> Below 1 V
ACTD (D3-2) - Body ground	Y-G - Body ground	Door lock motor UNLOCK drive output (driver door)	Door control switch (master switch or passenger side switch) or door key cylinder (driver or passenger) OFF --> UNLOCK --> OFF	Below 1 V 10 to 14 V --> Below 1 V
ACT- (D3-13) - Body Below 1 V ground	L-B - Body ground	Door lock motor UNLOCK drive output (passenger, rear LH, rear RH and back doors)		Below 1 V 10 to 14 V --> Below 1 V

If the result is not as specified, the relay may have a malfunction.