STOP AND START SYSTEM TERMINALS OF ECU

ENGINE STOP AND START ECU

1. Disconnect the A73, A38 and I57 engine stop and start ECU connectors.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A73-1 (BIN2) - Body ground	R - Body ground	Battery	Always	9.5 to 14 V
   A73-2 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   A73-3 (BIN1) - Body ground	L - Body ground	Battery	Always	9.5 to 14 V
   A73-8 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   A38-1 (+B) - Body ground	B - Body ground	Power source of engine stop and start ECU	Engine switch on (IG)	9.5 to 14 V
   A38-6 (DGND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   A38-10 (NE) - Body ground	B - Body ground	Engine speed signal from ECM	Always	10 kΩ or higher
   I57-13 (CANH) - Body ground	LG - Body ground	CAN communication	Always	200 Ω or higher
   I57-14 (CANL) - Body ground	W - Body ground	CAN communication	Always	200 Ω or higher
   I57-18 (IG2) - Body ground	V - Body ground	Engine switch signal	Engine switch on (IG)	9.5 to 14 V
   I57-19 (ACC) - Body ground	R - Body ground	Engine switch signal	Engine switch on (ACC)	9.5 to 14 V
   I57-21 (IG1) - Body ground	L - Body ground	Engine switch signal	Engine switch on (IG)	9.5 to 14 V

3. Reconnect the A73, A38 and I57 engine stop and start ECU connectors.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   A73-6 (OP21) - A38-6 (DGND)	B - W-B	Oil pump with motor assembly (automatic transaxle assembly) drive power source signal	Either of the following conditions is met: Engine stopped by stop and start control Engine switch on (IG) (engine not running) and Active Test "Oil Pump" being performed	10.5 to 16 V
   A38-3 (BRE2) - Body ground	G - Body ground	Ground (vacuum sensor assembly)	Always	Below 1 Ω
   A38-7 (BNT1) - A38-6 (DGND)	GR - W-B	Engine hood courtesy switch (Hood lock assembly) signal	Engine switch on (IG) Engine stopped Engine hood closed	0 to 1.5 V
   			Engine switch on (IG) Engine stopped Engine hood open	8 to 14 V
   A38-9 (OPM1) - A38-6 (DGND)	LG - W-B	Oil pump with motor assembly (automatic transaxle assembly) directions signal	Either of the following conditions is met: Engine stopped by stop and start control Engine switch on (IG) (engine not running) and Active Test "Oil Pump" being performed	Pulse generation (see waveform 1)
   A38-10 (NE) - A38-6 (DGND)	B - W-B	Engine speed signal from ECM	Idling after engine warmed up	Pulse generation (see waveform 2)
   A38-13 (PB) - A38-3 (BRE2)	B - G	Vacuum sensor assembly signal	Engine switch on (IG) Absolute pressure of 40 kPa (300 mmHg, 11.8 in.Hg) applied to vacuum sensor assembly	1.6 to 2.0 V
   			Engine switch on (IG) Absolute pressure of 60 kPa (450 mmHg, 17.7 in.Hg) applied to vacuum sensor assembly	2.2 to 2.6 V
   			Engine switch on (IG) Atmospheric pressure applied to vacuum sensor assembly	3.4 to 3.8 V
   A38-14 (BRVC) - A38-6 (DGND)	P - W-B	Vacuum sensor assembly power supply	Engine switch on (IG) Engine stopped	4.5 to 5.5 V
   A38-17 (CLL) - A38-6 (DGND)	R - W-B	Park/neutral position switch assembly signal	Engine switch on (IG) Shift lever not in P or N	8 to 14 V
   			Engine switch on (IG) Shift lever in P or N	Below 3.0 V
   A38-21 (STA) - A38-6 (DGND)	LG - W-B	Starter pinion operation signal	Cranking	6.0 V or more
   A38-23 (STA2) - A38-6 (DGND)	R - W-B	Starter motor operation signal	Cranking	6.0 V or more
   A38-27 (NOPM) - A38-6 (DGND)	W - W-B	Oil pump with motor assembly (automatic transaxle assembly) speed signal	Either of the following conditions is met: Engine stopped by stop and start control Engine switch on (IG) (engine not running) and Active Test "Oil Pump" being performed	Pulse generation (see waveform 3)
   I57-1 (IG31) - A38-6 (DGND)	SB - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V
   I57-3 (IG41) - A38-6 (DGND)	L - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V
   I57-5 (ECAN) -A38-6 (DGND)	V - W-B	Stop and start system cancel switch (combination switch assembly) signal	Engine switch on (IG) Stop and start system cancel switch (combination switch assembly) pressed	0 to 1.5 V
   			Engine switch on (IG) Stop and start system cancel switch (combination switch assembly) not pressed	8 to 14 V
   I57-6 (IG11) - A38-6 (DGND)	L - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V
   I57-12 (B42) - A38-6 (DGND)	B - W-B	Backup boost converter signal	Always	10.5 to 16 V
   I57-2 (B41) - A38-6 (DGND)	R - W-B	Backup boost converter signal	Always	10.5 to 16 V
   I57-18 (IG2) - A38-6 (DGND)	V - W-B	Engine switch signal	Engine switch on (ACC)	Below 1 V
   			Engine switch on (IG)	9.5 to 14 V
   I57-19 (ACC) - A38-6 (DGND)	R - W-B	Engine switch signal	Engine switch off	Below 1 V
   			Engine switch on (ACC)	9.5 to 14 V
   I57-21 (IG1) - A38-6 (DGND)	L - W-B	Engine switch signal	Engine switch on (ACC)	Below 1 V
   			Engine switch on (IG)	9.5 to 14 V
   I57-24 (AC41) - A38-6 (DGND)	B - W-B	Backup boost converter signal	Engine switch on (ACC)	10.5 to 16 V

5. 

   *a	5 V/DIV.
   *b	5 ms./DIV.

   Waveform 1

   Item	Content
   Tester Connection	A38-9 (OPM1) - A38-6 (DGND)
   Tool Setting	5 V/DIV., 5 ms./DIV.
   Condition	Either of the following conditions is met: Engine stopped by stop and start control Engine switch on (IG) (engine not running) and Active Test "Oil Pump" being performed

6. 

   *a	5 V/DIV.
   *b	2 ms./DIV.

   Waveform 2

   Item	Content
   Tester Connection	A38-10 (NE) - A38-6 (DGND)
   Tool Setting	5 V/DIV., 2 ms./DIV.
   Condition	Idling after engine warmed up

7. 

   *a	5 V/DIV.
   *b	5 ms./DIV.

   Waveform 3

   Item	Content
   Tester Connection	A38-27 (NOPM) - A38-6 (DGND)
   Tool Setting	5 V/DIV., 5 ms./DIV.
   Condition	Either of the following conditions is met: Engine stopped by stop and start control Engine switch on (IG) (engine not running) and Active Test "Oil Pump" being performed