Terminals Of Ecu

WARNING: This page is about a different car, the 2005 Lexus RX 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POSITION CONTROL ECU & SWITCH ASSY

Fig 1: Checking Position Control ECU & Switch Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the P32 and P33 ECU & switch connectors.

Check the voltage of each terminal of the wire harness side connectors.

Standard:

POSITION CONTROL ECU & SWITCH ASSY (DISCONNECTED)

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND (P33-1) - Body ground	W-B - Body ground	Ground	Constant	Below 1 V
+B (P33-5) - P33-1 (GND)	LG - W-B	Battery	Constant	11 to 14 V
SYSB (P32-8) - P33-1 (GND)	GR - W-B	Power source	Constant	11 to 14 V
IG (P32-4) - P33-1 (GND)	Y - W-B	Ignition switch	Ignition switch OFF --> ON	0 V --> 11 to 14 V

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

Reconnect the P32 and P33 ECU & switch connectors.
Check the voltage of each terminal of the connectors.
Standard:

Fig 2: Checking Position Control ECU And Switch Assy (Reconnected)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, the position control ECU & switch may be malfunctioning.