Terminals Of Ecu

CHECK STEERING LOCK ECU

Fig 1: Steering Lock ECU D29 Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D29-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
D29-6 (IG2) - D29-1 (GND)	B - W-B	IG2 signal input	Engine switch off → engine switch on (IG)	Below 1 V → 11 to 14 V
D29-7 (B) - D29-1 (GND)	R - W-B	Power source	Always	11 to 14 V

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

Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D29-3 (IGE) - D29-1 (GND)	V - W-B	Power source for motor drive	When all conditions are met: Steering lock unlocked Engine switch off Shift lever in P Driver side door closed → opened	11 to 14 V (Steering lock motor not operating) → Below 1 V (Steering lock motor operating) → 11 to 14 V (Steering lock motor not operating)
D29-4 (SLP1) - D29-1 (GND)	G - W-B	Unlock position sensor output signal	Steering lock locked → steering lock unlocked	11 to 14 V → Below 1.2 V

If the result is not as specified, there may be a malfunction in the steering lock ECU.