Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 69

1A-223 Engine General Information and Diagnosis: For Petrol Engine Model

C37-14

GRY/

RED

Output of 5 V
power source for
MAP sensor, A/C
refrigerant
pressure sensor,
electric load
current sensor
(J20A engine) and
CO adjusting
resistor (if
equipped)

4.5 – 5.5 V

Ignition switch turned ON.

—

C37-15

BLK/
ORN

Ground for ECM

Below 0.3 V

Ignition switch turned ON.

—

C37-16

PNK/

GRN

Fuel injector No.3

10 – 14 V

Ignition switch turned ON.

—

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference

waveform No.1: For

Petrol Engine Model”

and “Reference

waveform No.10: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.

C37-17

PNK/

BLU

Fuel injector No.4

10 – 14 V

Ignition switch turned ON.

—

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference

waveform No.1: For

Petrol Engine Model”

and “Reference

waveform No.11: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active low
pulse. Pulse frequency
varies depending on
engine speed.

C37-18

BRN/

YEL

Ignition coil No.4
(J20A engine)

0 – 0.6 V

Ignition switch turned ON.

—

*0 – 0.6 V

↑↓

3 – 5 V

(“Reference

waveform No.12: For
Petrol Engine Model”

and “Reference

waveform No.13: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active
high pulse. Pulse
frequency varies
depending on engine
speed.

C37-19

BRN/

WHT

Ignition coil No.3
(J20A engine)

0 – 0.6 V

Ignition switch turned ON.

—

*0 – 0.6 V

↑↓

3 – 5 V

(“Reference

waveform No.12: For
Petrol Engine Model”

and “Reference

waveform No.14: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active
high pulse. Pulse
frequency varies
depending on engine
speed.

Terminal

No.

Wire

color

Circuit

Normal voltage

Condition

Remarks

Engine General Information and Diagnosis: For Petrol Engine Model 1A-224

C37-20

BRN/

BLK

Ignition coil No.2
and No.3 (M16A
engine)

0 – 0.6 V

Ignition switch turned ON.

—

Ignition coil No.2
(J20A engine)

*0 – 0.6 V

↑↓

3 – 5 V

(“Reference

waveform No.12: For
Petrol Engine Model”

and “Reference

waveform No.15: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active
high pulse. Pulse
frequency varies
depending on engine
speed.

C37-21

BRN

Ignition coil No.1
and No.4 (M16A
engine)

0 – 0.6 V

Ignition switch turned ON.

—

Ignition coil No.1
(J20A engine)

*0 – 0.6 V

↑↓

3 – 5 V

(“Reference

waveform No.12: For
Petrol Engine Model”

and “Reference

waveform No.16: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active
high pulse. Pulse
frequency varies
depending on engine
speed.

C37-22

BLK/

YEL

Starting motor
control relay output

0 – 1 V

Ignition switch turned ON.

—

8 – 14 V

Ignition switch turned to
ST (engine cranking)
position.

C37-23

—

—

—

—

—

C37-24

PPL/

YEL

Engine coolant
temp. (ECT)
sensor signal

3.3 – 3.8 V

Ignition switch turned ON,
ECT at 0

°C, 32 °F.

—

1.38 – 1.72 V

Ignition switch turned ON,
ECT at 50

°C, 122 °F.

0.40 – 0.53 V

Ignition switch turned ON,
ECT at 100

°C, 212 °F.

C37-25 LT GRN

Intake air temp.
(IAT) sensor signal

3.18 – 3.67 V

Ignition switch turned ON,
IAT at 0

°C, 32 °F.

—

1.32 – 1.65 V

Ignition switch turned ON,
IAT at 40

°C, 104 °F.

0.46 – 0.60 V

Ignition switch turned ON,
IAT at 80

°C, 176 °F.

C37-26

RED

Mass air flow
(MAF) sensor
signal

0.5 – 1.0 V

Ignition switch turned ON
with engine at stop.

—

1.3 – 1.8 V

(“Reference

waveform No.17: For

Petrol Engine Model”)

When engine running at
specified idle speed after
warmed up.

C37-27

BLU

Ground for MAF
sensor

Below 0.3 V

Ignition switch turned ON.

—

C37-28

BRN/

BLK

Generator control
signal output

*0 – 0.6 V

↑↓

5 – 7 V

(“Reference

waveform No.5: For

Petrol Engine Model”

and “Reference

waveform No.6: For

Petrol Engine Model”)

Engine running at idle
speed, headlight switch
turned ON.

Output signal is active low
duty pulse. Duty ratio
varies depending on
vehicle condition.

Terminal

No.

Wire

color

Circuit

Normal voltage

Condition

Remarks

1A-225 Engine General Information and Diagnosis: For Petrol Engine Model

C37-29

BLK/

YEL

Ground for ECM

Below 0.3 V

Ignition switch turned ON.

—

C37-30

BLK/
ORN

Ground for ECM

Below 0.3 V

Ignition switch turned ON.

—

C37-31

BLK/

YEL

Ground for A/F
sensor heater

Below 0.3 V

Ignition switch turned ON.

—

C37-32

PNK/

BLU

Heater output of A/
F sensor

10 – 14 V

Ignition switch turned ON.

—

*0 – 1 V

↑↓

10 – 14 V

(“Reference

waveform No.18: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active low
duty pulse. Duty ratio
varies depending on
engine condition.

C37-33

GRY/

RED

Intake manifold
tuning vacuum
solenoid valve
output (J20A
engine)

10 – 14 V

Ignition switch turned ON.

—

0 – 1 V

(“Reference

waveform No.19: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

C37-34

RED/

BLU

Ground for A/F
sensor adjusting
resistor (J20A
engine)

Below 0.3 V

Ignition switch turned ON.

—

C37-35

RED/

YEL

A/F sensor
adjusting resistor
signal (J20A
engine)

0.15 – 4.82 V

Ignition switch turned ON.

—

C37-36

PNK

Crankshaft position
(CKP) sensor (–)
(J20A engine)

0 – 1 V

Ignition switch turned ON.

—

*4 – 6 V

↑↓

–4 – –6 V

(“Reference

waveform No.20: For
Petrol Engine Model”

and “Reference

waveform No.21: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is sinusoidal
waveform.
Waveform frequency
varies depending on
engine speed. (30 (36 – 6)
pulses are generated par
1 crankshaft revolution.)

C37-37

BLK

A/F sensor signal
(–)

2.6 – 2.8 V

(“Reference

waveform No.18: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

—

C37-38

WHT

A/F sensor signal
(+)

3.0 – 3.2 V

(“Reference

waveform No.18: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

—

C37-39

—

—

—

—

—

C37-40

RED

Throttle position
sensor (sub) signal

1.60 – 1.91 V

Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.

—

3.88 – 4.45 V

Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.

C37-41

GRN

Ground for throttle
position sensor

Below 0.3 V

Ignition switch turned ON.

—

C37-42

—

—

—

—

—

C37-43

—

—

—

—

—

Terminal

No.

Wire

color

Circuit

Normal voltage

Condition

Remarks

Engine General Information and Diagnosis: For Petrol Engine Model 1A-226

C37-44

BLU/

RED

Output of throttle
actuator

0 – 1 V

Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.

Output signal is duty
pulse. Duty ratio varies
depending on throttle
valve and accelerator
pedal position.

*0 – 1 V

↑↓

10 – 14 V

(“Reference

waveform No.22: For
Petrol Engine Model”

and “Reference

waveform No.23: For

Petrol Engine Model”)

Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.

C37-45

BLU/

YEL

Output of throttle
actuator

0 – 1 V

Ignition switch turned ON
and accelerator pedal at
full depressed position
after warmed up engine.

Output signal is duty
pulse. Duty ratio varies
depending on throttle
valve and accelerator
pedal position.

*0 – 1 V

↑↓

10 – 14 V

(“Reference

waveform No.22: For
Petrol Engine Model”

and “Reference

waveform No.23: For

Petrol Engine Model”)

Ignition switch turned ON
and accelerator pedal at
idle position after warmed
up engine.

C37-46

—

—

—

—

—

C37-47

BLK/

RED

Heater output of
heated oxygen
sensor-2

10 – 14 V

Ignition switch turned ON.

—

*0 – 1 V

↑↓

10 – 14 V

(“Reference

waveform No.7: For

Petrol Engine Model”

and “Reference

waveform No.8: For

Petrol Engine Model”)

Engine running at idle
after warmed up engine.

Output signal is active low
duty pulse. Duty ratio
varies depending on
engine condition.

C37-48

BLK/

YEL

Ground for ECM

Below 0.3 V

Ignition switch turned ON.

—

C37-49

—

—

—

—

—

C37-50

—

—

—

—

—

Terminal

No.

Wire

color

Circuit

Normal voltage

Condition

Remarks