Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual — part 14

1A-52 Engine General Information and Diagnosis:

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: ”)

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: ” and
“Reference waveform

No.6: ”)

Engine running at idle
speed, headlight switch
turned ON.

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

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: ”)

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 (for J20
engine)

10 – 14 V

Ignition switch turned ON.

—

0 – 1 V

(“Reference

waveform No.19: ”)

Engine running at idle
after warmed up engine.

C37-34

RED/

BLU

Ground for A/F
sensor adjusting
resistor

Below 0.3 V

Ignition switch turned ON.

—

C37-35

RED/

YEL

A/F sensor
adjusting resistor
signal

0.15 – 4.82 V

Ignition switch turned ON.

—

C37-36

PNK

Crankshaft position
(CKP) sensor (–)
(for J20 engine)

0 – 1 V

Ignition switch turned ON.

—

*4 – 6 V

↑↓

–4 – –6 V

(“Reference

waveform No.20: ”

and “Reference

waveform No.21: ”)

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.)

Terminal

No.

Wire

color

Circuit

Normal voltage

Condition

Remarks

Engine General Information and Diagnosis: 1A-53

C37-37

BLK

A/F sensor signal
(–)

2.6 – 2.8 V

(“Reference

waveform No.18: ”)

Engine running at idle
after warmed up engine.

—

C37-38

WHT

A/F sensor signal
(+)

3.0 – 3.2 V

(“Reference

waveform No.18: ”)

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

—

—

—

—

—

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: ”

and “Reference

waveform No.23: ”)

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: ”

and “Reference

waveform No.23: ”)

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: ” and
“Reference waveform

No.8: ”)

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

1A-54 Engine General Information and Diagnosis:

C37-51

WHT/

BLU

CKP sensor signal
(for M16 engine)

0 – 1 V or 4 – 5 V

Ignition switch turned ON.

—

*4 – 5 V

↑↓

0 – 0.6 V

(“Reference

waveform No.20: ”

and “Reference

waveform No.21: ”)

Engine running at idle
after warmed up engine.

Sensor signal is pulse.
Pulse frequency which
varies depending on
engine speed.
(30 (36 – 6) pulses are
generated per 1
crankshaft revolution.)

GRN

Crankshaft position
(CKP) sensor (+)
(for J20 engine)

0 – 1 V

Ignition switch turned ON.

—

*4 – 6 V

↑↓

–4 – –6 V

(“Reference

waveform No.20: ”

and “Reference

waveform No.21: ”)

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.)

C37-52

WHT/

RED

CMP sensor signal

0 – 1 V or 4 – 5 V

Ignition switch turned ON.

—

*0 – 0.6 V

↑↓

4 – 5 V

(“Reference

waveform No.20: ”

and “Reference

waveform No.21: ”)

Engine running at idle
after warmed up engine.

Sensor signal is pulse.
Pulse frequency varies
depending on engine
speed.
(6 pulses are generated
per 1 camshaft revolution.)

C37-53

WHT

Output for 5 V
power source of
throttle position
sensor

4.5 – 5.5 V

Ignition switch turned ON.

—

C37-54

BLK

Throttle position
sensor (main)
signal

0.72 – 1.04 V

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

—

3.67 – 4.25 V

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

C37-55

RED/

WHT

Manifold absolute
pressure (MAP)
sensor signal

Approx. 4 V
(“Reference

waveform No.24: ”

Ignition switch turned ON
with barometric pressure
at 100 kPa, 760 mmHg.

—

0.4 – 2.0 V

(“Reference

waveform No.25: ”

While engine running at
specified idle speed after
warmed up with
barometric pressure at
100 kPa, 760 mmHg.

C37-56

WHT

Knock sensor
signal

2 – 3 V

(“Reference

waveform No.26: ”

and “Reference

waveform No.27: ”)

Ignition switch turned ON.

—

Engine running at 4000 r/
min. after warmed up.

C37-57

GRY/

GRN

Ground for sensors

Below 0.3 V

Ignition switch turned ON.

—

C37-58

BLK/

YEL

Ground for ECM

Below 0.3 V

Ignition switch turned ON.

—

C37-59

BRN/

YEL

Oil control valve
ground (for M16
engine)

Below 1.3 V

Ignition switch turned ON.

—

Terminal

No.

Wire

color

Circuit

Normal voltage

Condition

Remarks

Engine General Information and Diagnosis: 1A-55

C37-60

BRN/

WHT

Oil control valve
output (for M16
engine)

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference

waveform No.28: ”

and “Reference

waveform No.29: ”)

At the moment of ignition
switch turned ON.

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

E23-1

BLU/

BLK

Main power supply

10 – 14 V

Ignition switch turned ON.

—

E23-2

WHT

Power source for
ECM internal
memory

10 – 14 V

Ignition switch turned ON.

—

E23-3

—

—

—

—

—

E23-4

WHT/

RED

CAN (high)
communication line
(active high signal)

*2.5 – 4.5 V
(“Reference

waveform No.30: ”)

Ignition switch turned ON
with engine at stop.

CAN communication line
signal is pulse. Pulse
signal displayed with a
regular frequency which
varies depending on
engine condition.

E23-5

PPL/

WHT

Serial
communication line
of data link
connector 12 V

8 – 14 V

Ignition switch turned ON.

—

E23-6

BLK/

WHT

Cruise control main
switch signal (if
equipped with
cruise control
system)

10 – 14 V

Ignition switch turned ON,
cruise control main switch
to ON position. (cruise
control main switch is kept
in push)

—

E23-7

BLU

Clutch pedal
position switch
signal (for M/T
model, if equipped
with cruise control
system)

4 – 6 V

Ignition switch turned ON,
clutch pedal not
depressed.

—

0 – 1 V

Ignition switch turned ON,
clutch pedal full
depressed.

E23-8

YEL/
GRN

Brake pedal
position switch
signal (if equipped
with cruise control
system)

10 – 14 V

Ignition switch turned ON,
stop lamp not lit up.

—

0 – 1 V

Ignition switch turned ON,
stop lamp lit up.

E23-9

—

—

—

—

—

E23-10

—

—

—

—

—

E23-11

—

—

—

—

—

E23-12

YEL

Diagnosis switch
terminal (if
equipped)

4 – 5 V

Ignition switch turned ON.

—

E23-13

PNK/

BLU

Clock signal for
immobilizer coil
antenna (if
equipped)

10 – 14 V

Ignition switch turned ON.

—

E23-14

—

—

—

—

—

E23-15

WHT/

GRN

Fuel pump relay
output

0 – 2.5 V

For 2 sec. from the time
ignition switch is turned
ON or while engine is
running.

—

10 – 14 V

On and after 2 sec. from
the time ignition switch is
turned ON or while engine
is at stop.

Terminal

No.

Wire

color

Circuit

Normal voltage

Condition

Remarks