STOP AND START SYSTEM TERMINALS OF ECU

ENGINE STOP AND START ECU

1. Disconnect the A8, A9 and E24 engine stop and start ECU connector.

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
   A8-5 (+B) - Body ground	B - Body ground	Power source of engine stop and start ECU	Ignition switch ON	9.5 to 14 V
   A8-7 (BIN) - Body ground	L - Body ground	Battery	Always	9.5 to 14 V
   A8-8 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   A9-10 (NE) - Body ground	L - Body ground	Engine speed signal from ECM	Always	10 kΩ or higher
   A9-17 (VB-) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   E24-15 (CANH) - Body ground	P - Body ground	CAN communication	Always	200 Ω or higher
   E24-16 (CANL) - Body ground	W - Body ground	CAN communication	Always	200 Ω or higher
   E24-17 (IG1) - Body ground	L - Body ground	Ignition switch signal	Ignition switch ON	9.5 to 14 V
   E24-19 (ACC) - Body ground	GR - Body ground	Ignition switch signal	Ignition switch ACC	9.5 to 14 V
   E24-20 (IG2) - Body ground	P - Body ground	Ignition switch signal	Ignition switch ON	9.5 to 14 V

3. Reconnect the A8, A9 and E24 engine stop and start ECU connector.

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
   A8-6 (OPO) - A8-8 (GND)*1	B - W-B	Oil pump with motor assembly drive power source signal	Either of the following conditions is met: Engine stopped by stop and start control Ignition switch ON (engine not running) and Active Test "AT Oil Pump (Lo)" being performed	10.5 to 16 V
   A9-3 (BRE2) - Body ground	G - Body ground	Ground (vacuum sensor assembly (brake booster pressure sensor))	Always	Below 1 Ω
   A9-7 (BNT1) - A8-8 (GND)	R - W-B	Engine hood courtesy switch (hood lock assembly) signal	Ignition switch ON Engine stopped Engine hood closed	0 to 1.5 V
   			Ignition switch ON Engine stopped Engine hood open	8 to 14 V
   A9-9 (OPM1) - A8-8 (GND)*1	P - W-B	Oil pump with motor assembly directions signal	Either of the following conditions is met: Engine stopped by stop and start control Ignition switch ON (engine not running) and Active Test "AT Oil Pump (Lo)" being performed	Pulse generation (see waveform 1)
   A9-10 (NE) - A8-8 (GND)	L - W-B	Engine speed signal from ECM	Idling after engine warmed up	Pulse generation (see waveform 2)
   A9-11 (CLU) - A8-8 (GND)*2	GR - W-B	Clutch start switch assembly (for upper) signal	Ignition switch ON Clutch pedal released	8 to 14 V
   			Ignition switch ON Clutch pedal fully depressed	Below 1.5 V
   A9-13 (PB) - A9-3 (BRE2)	B - G	Vacuum sensor assembly (brake booster pressure sensor) signal	Ignition switch ON Absolute pressure of 40 kPa 40 kPa (0.4 kgf/cm2, 5.8 psi) applied to vacuum sensor assembly (brake booster pressure sensor)	1.6 to 2.0 V
   			Ignition switch ON Absolute pressure of 60 kPa (0.6 kgf/cm2, 8.7 psi) applied to vacuum sensor assembly (brake booster pressure sensor)	2.2 to 2.6 V
   			Ignition switch ON Atmospheric pressure applied to vacuum sensor assembly (brake booster pressure sensor)	3.4 to 3.8 V
   A9-14 (BRVC) - A8-8 (GND)	P - W-B	Vacuum sensor assembly (brake booster pressure sensor) power supply	Ignition switch ON Engine stopped	4.5 to 5.5 V
   A9-21 (STA) - A8-8 (GND)	LG - W-B	Starter operation signal	Ignition switch ON	0 V to 1.5 V
   			Cranking	6 V to 14 V
   A9-26 (TMVC) - A8-8 (GND)*2	B - W-B	Neutral position switch power supply	Ignition switch ON Engine stopped	4.5 to 5.5 V
   A9-27 (NOPM) - A8-8 (GND)*1	GR - W-B	Oil pump with motor assembly speed signal	Either of the following conditions is met: Engine stopped by stop and start control Ignition switch ON (engine not running) and Active Test "AT Oil Pump (Lo)" being performed	Pulse generation (see waveform 3)
   A9-27 (TMN) - A9-25 (TME2)*2	R - GR	Neutral position switch signal	Ignition switch ON Shift lever in neutral	2.7 to 4.3 V
   			Ignition switch ON Shift lever in any other than neutral	0.7 to 1.9 V
   A9-28 (CLL) - A8-8 (GND)	W - W-B	Park/neutral position switch signal*2	Ignition switch ON Shift lever in any other than N or P	8 to 14 V
   			Ignition switch ON Shift lever in N or P	Below 3.0 V
   		Clutch start switch assembly (for lower) signal*3	Ignition switch ON Clutch pedal released	8 to 14 V
   			Ignition switch ON Clutch pedal fully depressed	Below 1.5 V
   E24-2 (BO1) - A8-8 (GND)	SB - W-B	Backup boost converter signal	Always	9.5 to 14 V
   E24-3 (ACO) - A8-8 (GND)	GR - W-B	Backup boost converter signal	Ignition switch ACC	9.5 to 14 V
   E24-4 (CHI) - A8-8 (GND)*3	R - W-B	Combustion type Power heater system operating signal	Ignition switch ON Heater switch assembly on	9.5 to 14 V
   			Ignition switch ON Heater switch assembly off	Below 1 V
   E24-11 (IGO2) - A8-8 (GND)	P - W-B	Backup boost converter signal	Ignition switch ON	9.5 to 14 V
   E24-12 (IGO1) - A8-8 (GND)	L - W-B	Backup boost converter signal	Ignition switch ON	9.5 to 14 V
   E24-17 (IG1) - A8-8 (GND)	L - W-B	Ignition switch signal	Ignition switch ACC	Below 1 V
   			Ignition switch ON	9.5 to 14 V
   E24-19 (ACC) - A8-8 (GND)	GR - W-B	Ignition switch signal	Ignition switch off	Below 1 V
   			Ignition switch ACC	9.5 to 14 V
   E24-20 (IG2) - A8-8 (GND)	P - W-B	Ignition switch signal	Ignition switch ACC	Below 1 V
   			Ignition switch ON	9.5 to 14 V
   E24-23 (ECAN) - A8-8 (GND)	V - W-B	Eco run cancel switch assembly signal	Ignition switch ON Eco run cancel switch assembly pressed	0 to 1.5 V
   			Ignition switch ON Eco run cancel switch assembly not pressed	8 to 14 V

   
   

   • *1: for CVT

   • *2: for Manual Transaxle

   • *3: w/ Combustion Type Power Heater System

5. 

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

   Waveform 1

   Item	Content
   Tester Connection	A9-9 (OPM1) - A8-8 (GND)
   Tool Setting	5 V/DIV., 5 ms./DIV.
   Condition	Either of the following conditions is met: Engine stopped by stop and start control Ignition switch ON (engine not running) and Active Test "AT Oil Pump (Lo)" being performed

6. 

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

   Waveform 2

   Engine Speed Signal

   Item	Content
   Tester Connection	A9-10 (NE) - A8-8 (GND)
   Tool Setting	5 V/DIV, 2 ms/DIV
   Condition	Idling after engine warmed up

   Tech Tips

   The wavelength become shorter as the engine speed increases.

7. 

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

   Waveform 3

   Item	Content
   Tester Connection	A9-27 (NOPM) - A8-8 (GND)
   Tool Setting	5 V/DIV., 5 ms./DIV.
   Condition	Either of the following conditions is met: Engine stopped by stop and start control Ignition switch ON (engine not running) and Active Test "AT Oil Pump (Lo)" being performed