Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 71

1A-231 Engine General Information and Diagnosis: For Petrol Engine Model

E23-49

PNK

A/C compressor 
relay output (if 
equipped with A/C)

10 – 14 V

Engine running, A/C 
switch OFF and blower 
selector at OFF position.

—

0 – 1 V

Engine running, A/C 
switch ON and blower 
selector at 1st position or 
more.

E23-50

BLU/
ORN

Throttle actuator 
control relay output

0 – 1 V

Ignition switch turned ON.

—

E23-51

BLU/

YEL

Ground for 
accelerator pedal 
position (APP) 
sensor (sub)

Below 0.3 V

Ignition switch turned ON.

—

E23-52

BLU/
GRN

Accelerator pedal 
position (APP) 
sensor (sub) signal

0.30 – 0.44 V

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

—

1.74 – 2.17 V

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

E23-53

ORN/

BLU

Output for 5 V 
power source of 
accelerator pedal 
position (APP) 
sensor (sub)

4.5 – 5.5 V

Ignition switch turned ON.

—

E23-54

ORN

Ground for 
accelerator pedal 
position (APP) 
sensor (main)

Below 0.3 V

Ignition switch turned ON.

—

E23-55

WHT/

BLU

Accelerator pedal 
position (APP) 
sensor (main) 
signal

0.65 – 0.82 V

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

—

3.50 – 4.27 V

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

E23-56

WHT

Output for 5 V 
power source of 
accelerator pedal 
position (APP) 
sensor (main)

4.5 – 5.5 V

Ignition switch turned ON.

—

E23-57

—

—

—

—

—

E23-58

—

—

—

—

—

E23-59

—

—

—

—

—

E23-60

BLU

Main power supply 
relay output

10 – 14 V

Ignition switch turned OFF.

—

0 – 2 V

Ignition switch turned ON.

Terminal 

No.

Wire 

color

Circuit

Normal voltage

Condition

Remarks

Engine General Information and Diagnosis: For Petrol Engine Model 1A-232

Reference waveform No.1
Fuel injector signal (1) with engine idling

Reference waveform No.2
No.1 fuel injector signal (2) with engine idling

Reference waveform No.3
No.2 fuel injector signal (2) with engine idling

Reference waveform No.4
EGR valve signal

Measurement 
terminal

CH1: “C37-2” to “C37-58”

Oscilloscope 
setting

CH1: 20 V/DIV
TIME: 1 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed

2. Fuel injection pulse width: 2-4 msec.
3. 10 – 14 V

Measurement 
terminal

CH1: “C37-52” to “C37-58”
CH2: “C37-1” to “C37-58”

Oscilloscope 
setting

CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed

1. Cylinder reference signal (CMP reference signal)
3. 720

° crank angle

I5JB0A110074-01

I5JB0A110075-01

Measurement 
terminal

CH1: “C37-52” to “C37-58”
CH2: “C37-2” to “C37-58”

Oscilloscope 
setting

CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed

1. Cylinder reference signal (CMP reference signal)
3. 720

° crank angle

Measurement 
terminal

CH1: “C37-5” to “C37-58”
CH2: “C37-6” to “C37-58”
CH3: “C37-3” to “C37-58”
CH4: “C37-4” to “C37-58”

Oscilloscope 
setting

CH1: 20 V/DIV, CH2: 20 V/DIV
CH3: 20 V/DIV, CH4: 20 V/DIV
TIME: 40 ms/DIV

Measurement 
condition

Engine at cranking

1. EGR valve stepper motor coil 1 signal
2. EGR valve stepper motor coil 2 signal
3. EGR valve stepper motor coil 3 signal
4. EGR valve stepper motor coil 4 signal
5. ON signal
6. OFF signal

I5JB0A110076-01

I4RS0B110053-01

1A-233 Engine General Information and Diagnosis: For Petrol Engine Model

Reference waveform No.5
Generator field coil monitor signal (1) at engine idling

Reference waveform No.6
Generator field coil monitor signal (1) at engine idling

Reference waveform No.7
Heated oxygen sensor-2 signal (1) with engine idling

Reference waveform No.8
Heated oxygen sensor-2 signal (1) with engine racing

Measurement 
terminal

CH1: “C37-8” to “C37-58”
CH2: “C37-28” to “C37-58”

Oscilloscope 
setting

CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 20 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed
• All accessory switch turned off

2. Generator output control signal

Measurement 
terminal

CH1: “C37-8” to “C37-58”
CH2: “C37-28” to “C37-58”

Oscilloscope 
setting

CH1: 5 V/DIV, CH2: 5 V/DIV
TIME: 20 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed
• For a few sec. from headlight 

switch turned ON

2. Generator output control signal

I5JB0A110077-01

I5JB0A110078-01

Measurement 
terminal

CH1: “C37-11” to “C37-57”
CH2: “C37-47” to “C37-58”

Oscilloscope 
setting

CH1: 200 mV/DIV, CH2: 10 V/DIV
TIME: 200 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed

2. Heated oxygen sensor-2 heater signal
3. One duty cycle

Measurement 
terminal

CH1: “C37-11” to “C37-57”
CH2: “C37-47” to “C37-58”

Oscilloscope 
setting

CH1: 500 mV/DIV, CH2: 10 V/DIV
TIME: 200 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine racing

2. Heated oxygen sensor-2 heater signal
3. Engine racing

I5JB0A110079-01

I5JB0A110080-03

Engine General Information and Diagnosis: For Petrol Engine Model 1A-234

Reference waveform No.9
EVAP canister purge valve signal

Reference waveform No.10
No.3 fuel injector signal (2) with engine idling

Reference waveform No.11
No.4 fuel injector signal (2) with engine idling

Measurement 
terminal

CH1: “C37-13” to “C37-58”

Oscilloscope 
setting

CH1: 10 V/DIV
TIME: 40 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Set EVAP canister purge valve at 

52% by using “Misc Test” of scan 
tool

1. ON signal
2. OFF signal
3. One duty cycle
4. 10 – 14 V

Measurement 
terminal

CH1: “C37-52” to “C37-58”
CH2: “C37-16” to “C37-58”

Oscilloscope 
setting

CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed

1. Cylinder reference signal (CMP reference signal)
3. 720

° crank angle

I4RS0B110067-01

I5JB0A110081-01

Measurement 
terminal

CH1: “C37-52” to “C37-58”
CH2: “C37-17” to “C37-58”

Oscilloscope 
setting

CH1: 5 V/DIV, CH2: 20 V/DIV
TIME: 40 ms/DIV

Measurement 
condition

• After warmed up to normal 

operating temperature

• Engine at specified idle speed

1. Cylinder reference signal (CMP reference signal)
3. 720

° crank angle

I5JB0A110082-01