Terminals Of Ecu

CHECK BACK DOOR ECU

Fig 1: Identifying Back Door ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltages of the wire harness side connectors.

Standard voltage:

STANDARD VOLTAGE SPECIFICATIONS

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
BECU (S2-5) - GND (S2-3)	W-R - W-B	ECU power supply (from battery)	Always	11 to 14 V
GND (S2-3) - Body ground	W-B - Body ground	Ground circuit	Always	Below 1 V
L (S5-5) - E (S5-19)	L-V-G	Back door lock key cylinder lock signal (Back window unlock signal)	Back door lock key cylinder lock OFF	11 to 14 V
L (S5-5) - E (S5-19)	L-V-G		Back door lock key cylinder lock ON (LOCK)	Below 1 V
GHC+ (S5-13) - GND (S2-3)	L-Y - W-B	Back window unlock operation signal	Back door lock key cylinder lock OFF	Below 1 V
GHC+ (S5-13) - GND (S2-3)	L-Y - W-B	Back window unlock operation signal	Back door lock key cylinder lock ON (LOCK) for 0.8 seconds or more	11 to 14 V → Below 1 V
P (S5-12) - E (S5-19)	P-B - V-G	Rear wiper housing position switch signal	Ignition switch ON and wiper switch OFF	Below 1 V

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