STOP AND START SYSTEM

Disconnect the A76, A77 and H191 engine stop and start ECU connectors.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A76-1 (BIN2) - Body ground	W - Body ground	Battery	Always	9.5 to 14 V
A76-2 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A76-3 (BIN1) - Body ground	B - Body ground	Battery	Always	9.5 to 14 V
A76-8 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A77-1 (+B) - Body ground	LG - Body ground	Power source of engine stop and start ECU	Engine switch on (IG)	9.5 to 14 V
A77-6 (DGND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A77-10 (NE) - Body ground	G - Body ground	Engine speed signal from ECM	Always	10 kΩ or higher
H191-13 (CANH) - Body ground	BE - Body ground	CAN communication	Always	200 Ω or higher
H191-14 (CANL) - Body ground	W - Body ground	CAN communication	Always	200 Ω or higher
H191-18 (IG2) - Body ground	LG - Body ground	Engine switch signal	Engine switch on (IG)	9.5 to 14 V
H191-19 (ACC) - Body ground	V - Body ground	Engine switch signal	Engine switch on (ACC)	9.5 to 14 V
H191-20 (ILL) - Body ground	G - Body ground	Headlight dimmer switch (light control switch) tail signal input	Headlight dimmer switch (light control switch) in tail or head position	9.5 to 14 V
H191-21 (IG1) - Body ground	P - Body ground	Engine switch signal	Engine switch on (IG)	9.5 to 14 V

Reconnect the A76, A77 and H191 engine stop and start ECU connectors.

Measure the resistance, voltage and check for pulse according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A77-3 (BRE2) - Body ground	G - Body ground	Ground (Vacuum sensor assembly)	Always	Below 1 Ω
A76-6 (OP21) - A77-6 (DGND)	V - W-B	Oil pump assembly with motor (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 "AT Oil Pump (Lo)" being performed	10.5 to 16 V
A77-7 (BNT1) - A77-6 (DGND)	V - W-B	Engine hood courtesy switch (hood lock assembly) signal	Engine switch on (IG) Engine stopped Engine hood closed	0 to 1.5 V
A77-7 (BNT1) - A77-6 (DGND)	V - W-B	Engine hood courtesy switch (hood lock assembly) signal	Engine switch on (IG) Engine stopped Engine hood open	8 to 14 V
A77-9 (OPM1) - A77-6 (DGND)	GR - W-B	Oil pump assembly with motor (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 "AT Oil Pump (Lo)" being performed	Pulse generation (see waveform 1)
A77-10 (NE) - A77-6 (DGND)	G - W-B	Engine speed signal from ECM	Idling after engine warmed up	Pulse generation (see waveform 2)
A77-13 (PB) - A77-3 (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
A77-14 (BRVC) - A77-6 (DGND)	P - W-B	Vacuum sensor assembly power supply	Engine switch on (IG) Engine stopped	4.5 to 5.5 V
A77-17 (CLL) - A77-6 (DGND)	L - W-B	Park/neutral position switch assembly signal	Engine switch on (IG) Shift lever in any other than N or P	8 to 14 V
A77-17 (CLL) - A77-6 (DGND)	L - W-B	Park/neutral position switch assembly signal	Engine switch on (IG) Shift lever in N or P	Below 3.0 V
A77-19 (DON2) - A77-6 (DGND)	LG - W-B	External backup boost converter (eco run vehicle converter assembly) signal	Engine running	Pulse generation (see waveform 3)
A77-21 (STA) - A77-6 (DGND)	G - W-B	Starter pinion operation signal	Cranking	6.0 V or more
A77-23 (STA2) - A77-6 (DGND)	BR - W-B	Starter motor operation signal	Cranking	6.0 V or more
A77-27 (NOPM) - A77-6 (DGND)	B - W-B	Oil pump assembly with motor (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 "AT Oil Pump (Lo)" being performed	Pulse generation (see waveform 4)
H191-1 (IG31) - A77-6 (DGND)	V - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V
H191-2 (B41) - A77-6 (DGND)	L - W-B	Backup boost converter signal	Always	10.5 to 16 V
H191-3 (IG41) - A77-6 (DGND)	Y - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V
H191-5 (ECAN) - A77-6 (DGND)	Y - W-B	Stop and start cancel switch (integration control and panel assembly) signal	Engine switch on (IG) Stop and start cancel switch (integration control and panel assembly) pressed	0 to 1.5 V
H191-5 (ECAN) - A77-6 (DGND)	Y - W-B		Engine switch on (IG) Stop and start cancel switch (integration control and panel assembly) not pressed	8 to 14 V
H191-6 (IG11) - A77-6 (DGND)	R - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V
H191-10 (IG12) - A77-6 (DGND)	GR - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V
H191-11 (B43) - A77-6 (DGND)	L - W-B	Backup boost converter signal	Always	10.5 to 16 V
H191-12 (B42) - A77-6 (DGND)	R - W-B	Backup boost converter signal	Always	10.5 to 16 V
H191-15 (AC42) - A77-6 (DGND)	GR - W-B	Backup boost converter signal	Engine switch on (ACC)	10.5 to 16 V
H191-16 (B12) - A77-6 (DGND)	Y - W-B	Backup boost converter signal	Always	10.5 to 16 V
H191-18 (IG2) - A77-6 (DGND)	LG - W-B	Engine switch signal	Engine switch on (ACC)	Below 1 V
H191-18 (IG2) - A77-6 (DGND)	LG - W-B	Engine switch signal	Engine switch on (IG)	9.5 to 14 V
H191-19 (ACC) - A77-6 (DGND)	V - W-B	Engine switch signal	Engine switch off	Below 1 V
H191-19 (ACC) - A77-6 (DGND)	V - W-B	Engine switch signal	Engine switch on (ACC)	9.5 to 14 V
H191-21 (IG1) - A77-6 (DGND)	P - W-B	Engine switch signal	Engine switch on (ACC)	Below 1 V
H191-21 (IG1) - A77-6 (DGND)	P - W-B	Engine switch signal	Engine switch on (IG)	9.5 to 14 V
H191-24 (AC41) - A77-6 (DGND)	B - W-B	Backup boost converter signal	Engine switch on (ACC)	10.5 to 16 V
H191-25 (IL41) - A77-6 (DGND)	G - W-B	Backup boost converter signal	Headlight dimmer switch (light control switch) in tail or head position	10.5 to 16 V
H191-26 (IG13) - A77-6 (DGND)	LG - W-B	Backup boost converter signal	Engine switch on (IG)	10.5 to 16 V


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

Waveform 1

Item	Content
Tester connection	A77-9 (OPM1) - A77-6 (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 "AT Oil Pump (Lo)" being performed

Item

Content

Tester connection

A77-9 (OPM1) - A77-6 (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 "AT Oil Pump (Lo)" being performed


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

Waveform 2

Item	Content
Tester connection	A77-10 (NE) - A77-6 (DGND)
Tool setting	5 V/DIV., 2 ms./DIV.
Condition	Idling after engine warmed up


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

Waveform 3

Item	Content
Tester connection	A77-19 (DON2) - A77-6 (DGND)
Tool setting	5 V/DIV., 2 ms./DIV.
Condition	Engine running


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

Waveform 4

Item	Content
Tester connection	A77-27 (NOPM) - A77-6 (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 "AT Oil Pump (Lo)" being performed