STOP AND START SYSTEM

Disconnect the A53 and F75 engine stop and start ECU connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A53-1 (CA3N) - Body ground	W - Body ground	CAN communication	Always	10 kΩ or higher
A53-2 (CA3P) - Body ground	B - Body ground	CAN communication	Always	10 kΩ or higher
A53-10 (NE) - Body ground	V - Body ground	Crankshaft position sensor signal	Always	10 kΩ or higher
A53-11 (+B) - Body ground	B - Body ground	Power source of engine stop and start ECU	Ignition switch ON	9.5 to 14 V
A53-13 (AM21) - Body ground	B - Body ground	Battery	Always	9.5 to 14 V
A53-14 (LIN1) - Body ground	Y - Body ground	LIN communication signal	Always	10 kΩ or higher
F75-1 (CA1L) - Body ground	W - Body ground	CAN communication	Always	10 kΩ or higher
F75-2 (CA1H) - Body ground	BE - Body ground	CAN communication	Always	10 kΩ or higher
F75-5 (GND2) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
F75-6 (GND1) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω

Reconnect the A53 and F75 engine stop and start ECU connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A53-4 (STA) - F75-6 (GND)	P - BR	Starter operation signal	Cranking	6 V or higher
A53-5 (DDON) - F75-6 (GND)	L - BR	Backup boost converter signal	Engine running	Pulse generation (see waveform 1)
A53-6 (CLL) - F75-6 (GND)	R - W-B	Clutch start switch (lower) signal*1	Ignition switch ON, clutch pedal released	8 to 14 V
		Clutch start switch (lower) signal*1	Ignition switch ON, clutch pedal fully depressed	0 to 1.5 V
		Park/Neutral position switch signal*2	Ignition switch ON, shift lever in P or N	8 to 14 V
		Park/Neutral position switch signal*2	Ignition switch ON, shift lever in other than P or N	0 to 1.5 V
A53-7 (OPM1) - F75-6 (GND)	P - BR	Oil pump motor output signal	Ignition switch ON, engine stopped, activate the AT oil pump (Lo)	Pulse generation (see waveform 2)
A53-8 (OPM2) - F75-6 (GND)	SB - BR	Oil pump relay signal	Ignition switch ON, engine stopped, activate the AT oil pump (Lo)	8 to 14 V
A53-9 (OPST) - F75-6 (GND)	V - BR	Oil pump motor condition signal	Idling after engine warmed up	8 to 14 V
A53-9 (OPST) - F75-6 (GND)	V - BR	Oil pump motor condition signal	Ignition switch ON, engine stopped, activate the AT oil pump (Lo)	Pulse generation (see waveform 3)
A53-10 (NE) - F75-6 (GND)	V - BR	Engine speed signal from ECM	Idling after engine warmed up	Pulse generation (see waveform 4)
A53-18 (BNT1) - F75-6 (GND)	P - BR	Engine hood courtesy switch signal	Ignition switch ON, engine stopped, engine hood closed	0 to 1.5 V
A53-18 (BNT1) - F75-6 (GND)	P - BR	Engine hood courtesy switch signal	Ignition switch ON, engine stopped, engine hood open	8 to 14 V
A53-19 (BRE2) - Body ground	B - Body ground	Body ground (Brake booster pressure sensor)	Always	Below 1 Ω
A53-20 (PB) - A53-19 (BRE2)	LG - B	Brake booster pressure sensor signal	Ignition switch ON, absolute pressure of 40 kPa (300 mmHg) applied to sensor	1.6 to 2.0 V
			Ignition switch ON, absolute pressure of 60 kPa (450 mmHg) applied to sensor	2.2 to 2.6 V
			Ignition switch ON, atmospheric pressure applied to vacuum sensor	3.4 to 3.8 V
A53-21 (BRVC) - F75-6 (GND)	G - BR	Brake booster pressure sensor power supply	Ignition switch ON, engine stopped	4.5 to 5.5 V
A53-24 (E2) - Body ground	V - Body ground	Body ground (Battery current sensor)	Always	Below 1 Ω
A53-25 (IB) - F75-6 (GND)	L - BR	Battery current sensor	Ignition switch ON	0.2 to 4.8 V
A53-26 (VC) - F75-6 (GND)	P - BR	Battery current sensor power supply	Ignition switch ON, engine stopped	4.5 to 5.5 V
A53-27 (THB) - F75-6 (GND)	SB - BR	Battery temperature sensor	Ignition switch ON	0.2 to 4.8 V
A53-29 (TMN) - F75-6 (GND)	W - BR	Neutral position switch signal	Ignition switch ON, shift lever in neutral	2.7 to 4.3 V
A53-29 (TMN) - F75-6 (GND)	W - BR	Neutral position switch signal	Ignition switch ON, shift lever in any position other than neutral	0.7 to 1.9 V
F75-3 (CLU) - F75-6 (GND)	B - W-B	Clutch switch (upper) signal	Clutch pedal released	8 to 14 V
F75-3 (CLU) - F75-6 (GND)	B - W-B	Clutch switch (upper) signal	Clutch pedal depressed	0 to 1.5 V
F75-4 (IG2) - F75-6 (GND)	GR - BR	Ignition switch signal	Ignition switch off	1 V or less
F75-4 (IG2) - F75-6 (GND)	GR - BR	Ignition switch signal	Ignition switch ON, engine stopped	8 to 14 V
F75-18 (ECAN) - F75-6 (GND)	SB - BR	Stop and start cancel switch signal	Ignition switch ON, stop and start cancel switch on	0 to 1.5 V
F75-18 (ECAN) - F75-6 (GND)	SB - BR	Stop and start cancel switch signal	Ignition switch ON, stop and start cancel switch off	8 to 14 V
F75-23 (TFAL) - F75-6 (GND)	Y - BR	A/C cooler thermistor signal	Ignition switch ON, A/C on with set temperature of 10 to 30°C (50 to 86°F)	2.4 to 2.9 V
F75-29 (SBL) - F75-6 (GND)	SB - W-B	Blower switch signal	Ignition switch ON, blower switch on	0 to 1.5 V
F75-29 (SBL) - F75-6 (GND)	SB - W-B	Blower switch signal	Ignition switch ON, blower switch off	8 to 14 V

Waveform 1

Eco Run Vehicle Converter (Backup Boost Converter) Signal
Item	Content
Tester connection	DDON - GND
Tool setting	5 V/DIV, 2 ms/DIV
Vehicle condition	Engine running

Tech Tips

According to the state of the eco run vehicle converter assembly, each waveform changes.

Waveform 2

Oil Pump Motor Output Signal
Item	Content
Tester connection	OPM1 - GND
Tool setting	5 V/DIV, 5 ms/DIV
Vehicle condition	Engine stopped (Stop and start system operation)

Waveform 3

Oil Pump Motor Condition Signal
Item	Content
Tester connection	OPST - GND
Tool setting	5 V/DIV, 5 ms/DIV
Vehicle condition	Engine stopped (Stop and start system operation)

Waveform 4

Engine Speed Signal
Item	Content
Tester connection	NE - GND
Tool setting	5 V/DIV, 2 ms/DIV
Vehicle condition	Idling after engine warmed up

Tech Tips

The wavelength become shorter as the engine speed increases.

STOP AND START SYSTEM TERMINALS OF ECU