Terminals Of Ecu

CHECK ELECTRIC POWER CONTROL ECU (PASSENGER SIDE JUNCTION BLOCK)

Fig 1: Identifying PA, PM, PK And A69 ECU Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

VOLTAGE AND RESISTANCE REFERENCE CHART

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
PA-39 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A69-8 (VB-) - Body ground	W-B - Body ground	Voltage detection (-)	Always	Below 1 Ω
PM-1 (BECU) - Body ground	L - Body ground	ECU power supply	Always	11 to 14 V
PM-1 (BCUT) - Body ground	L - Body ground	Power cut linked power (input)	Always	11 to 14 V
A69-18 (VB+) - Body ground	BE - Body ground	Voltage detection (+)	Always	11 to 14 V
PK-1 (IG) - Body ground	G - Body ground	IG power supply	Engine switch on (IG)	11 to 14 V

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

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

VOLTAGE AND RESISTANCE REFERENCE CHART

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
A69-12 (STSW) - PA-39 (GND)	B - W-B	Starter switch signal	Engine switch on (IG) → Engine cranking	Below 1 V → 8 to 14 V
A69-6 (VC) - PA-39 (GND)	B - W-B	Sensor power supply	Engine switch on (IG)	4.5 to 5.5 V
A69-9 (IB) - PA-39 (GND)	L - W-B	Battery current detection	Engine switch on (IG)	0.5 to 4.5 V
A69-10 (E2) - PA-39 (GND)	W - W-B	Sensor ground	Engine switch on (IG)	Below 1 Ω
A69-20 (THB) - PA-39 (GND)	P - W-B	Battery temperature detection	Engine switch on (IG)	0.5 to 4.5 V
PA-57 (CUTD) - PA-39 (GND) PA-35 (CUTD) - PA-39 (GND)	B - W-B B - W-B	Power cut linked power (output)	Engine switch on (IG)	11 to 14 V

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