STOP AND START SYSTEM > TERMINALS OF ECU



ENGINE STOP AND START ECU

A207157E06

HINT:
The standard voltage and resistance between each pair of ECU terminals are shown in the table below.
The appropriate conditions for checking each pair of terminals are also indicated.
The check results should be compared with the standard voltage, listed in the "Specified Condition" column.
The illustration above can be used to identify the ECU terminal locations.


Terminal No.
(Symbol)
Wiring Color
Terminal Description
Condition
Specified Condition
D79-1 (STA) - D78-6 (E1)
L - W-B
Starter operation signal
Cranking
6 V or higher
D79-4 (NE) - D78-6 (E1)
P - W-B
Engine speed signal from ECM
Idling after engine warmed up
Pulse generation
(see waveform 1)
D79-5 (BATT) - D78-6 (E1)
GR - W-B
Battery voltage (for engine stop and start ECU memory)
Always
11 to 14 V
D79-6 (+B) - D78-6 (E1)
G - W-B
Power source for engine stop and start ECU
Ignition switch ON, engine stopped
10 to 14 V
Ignition switch off
0 to 0.5 V
D79-9 (BNT1) - D78-6 (E1)
BE - W-B
Engine hood courtesy switch signal
Ignition switch ON, engine stopped, engine hood closed
0 to 1.5 V
Ignition switch ON, engine stopped, engine hood open
10 to 14 V
D79-10 (TMN) - D78-6 (E1)
W - W-B
Neutral position switch signal
Ignition switch ON, shift lever in neutral
0 to 1.5 V
Ignition switch ON, shift lever in any position other than neutral
10 to 14 V
D79-11 (PB) - D79-24 (E2)
Y - 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
D79-12 (RL) - D78-6 (E1)
R - W-B
Generator signal
Idling after engine warmed up
10 to 14 V
Ignition switch ON, engine stopped
0 to 1.5 V
D79-13 (CLL) - D78-6 (E1)
V - W-B
Clutch start switch (lower) signal
Clutch pedal released
10 to 14 V
Clutch pedal fully depressed
0 to 1.5 V
D79-18 (DDON) - D78-6 (E1)
V - W-B
Backup boost converter signal
Engine running
Pulse generation
(see waveform 2)
D79-19 (VC) - D78-6 (E1)
BR - W-B
Vacuum sensor power supply
Ignition switch ON, engine stopped
4.5 to 5.5 V
D79-20 (CLU) - D78-6 (E1)
G - W-B
Clutch switch (upper) signal
Clutch pedal released
10 to 14 V
Clutch pedal depressed
0 to 1.5 V
D79-22 (MOPS) - D78-6 (E1)
LG - W-B
Oil pressure switch signal
Ignition switch ON, engine stopped
0 to 1.5 V
Idling after engine warmed up
10 to 14 V
D79-24 (E2) - Body ground
B - Body ground
Sensor circuit ground wire
Always
Below 1 Ω
D78-1 (EC) - Body ground
BR - Body ground
Body ground wire
Always
Below 1 Ω
D78-6 (E1) - Body ground
W-B - Body ground
Body ground wire
Always
Below 1 Ω
D78-7 (ECLP) - D78-6 (E1)
BE - W-B
Stop and start cancel switch (illumination)
System disabled using stop and start cancel switch after ignition switch turned to ON (indicator on)
0 to 2.5 V
System not disabled using stop and start cancel switch after ignition switch turned to ON (indicator off)
10 to 14 V
D78-8 (ECAN) - D78-6 (E1)
R - W-B
Stop and start cancel switch
Ignition switch ON, stop and start cancel switch on
0 to 1.5 V
Ignition switch ON, stop and start cancel switch off
10 to 14 V
D78-9 (SP1) - D78-6 (E1)
W - W-B
Vehicle speed signal
Ignition switch ON, drive wheel rotated slowly
Pulse generation
(see waveform 3)
D78-10 (TFAL) - D79-24 (E2)
V - B
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
D78-16 (CANH) - D78-6 (E1)
BE - W-B
CAN communication circuit
Ignition switch ON
Pulse generation
(see waveform 4)
D78-17 (CANL) - D78-6 (E1)
W - W-B
CAN communication circuit
Ignition switch ON
Pulse generation
(see waveform 5)
D78-19 (IGSW) - D78-6 (E1)
SB - W-B
Ignition switch signal
Ignition switch ON, engine stopped
10 to 14 V
Ignition switch off
0 to 0.5 V
D78-22 (SBL) - D78-6 (E1)
G - W-B
Blower switch signal
Ignition switch ON, blower switch on
0 to 1.5 V
Ignition switch ON, blower switch off
10 to 14 V
D78-26 (OIL) - D78-6 (E1)
LG - W-B
Engine oil pressure warning light signal
Ignition switch ON, engine stopped (engine oil pressure warning light on)
5 to 6 V
Ignition switch ON, engine idling (engine oil pressure warning light off)
10 to 14 V


    A005137E03

  1. Waveform 1
    Engine Speed Signal 
    Item
    		Content
    Tester connection
    		D79-4 (NE) - D78-6 (E1)
    Tool setting
    		5 V/DIV, 2 ms/DIV
    Vehicle condition
    		Idling after engine warmed up

    HINT:
    The wavelength becomes shorter as the engine speed increases.



    2. A199267E04

  2. Waveform 2
    Backup Boost Converter Signal 
    Item
    		Content
    Tester connection
    		D79-18 (DDON) - D78-6 (E1)
    Tool setting
    		2 V/DIV, 2 ms/DIV
    Vehicle condition
    		Engine running

    HINT:
    The wavelength becomes shorter as the engine speed increases.



    3. A005135E52

  3. Waveform 3
    Vehicle Speed Signal 
    Item
    		Content
    Tester connection
    		D78-9 (SP1) - D78-6 (E1)
    Tool setting
    		5 V/DIV, 2 ms/DIV
    Vehicle condition
    		Ignition switch ON, drive wheel rotated slowly

    HINT:
    The wavelength becomes shorter as the vehicle speed increases.



    4. A086154E01

  4. Waveform 4
    CAN Communication Signal (Reference) 
    Item
    		Content
    Tester connection
    		D78-16 (CANH) - D78-6 (E1)
    Tool setting
    		1 V/DIV., 10 μsec./DIV.
    Vehicle condition
    		Ignition switch ON

    HINT:
    The waveform varies depending on the CAN communication signal.



    5. A086155E01

  5. Waveform 5
    CAN Communication Signal (Reference) 
    Item
    		Content
    Tester connection
    		D78-17 (CANL) - D78-6 (E1)
    Tool setting
    		1 V/DIV., 10 μsec./DIV.
    Vehicle condition
    		Ignition switch ON

    HINT:
    The waveform varies depending on the CAN communication signal.