Suzuki Grand Vitara JB627. Manual - part 66

1A-213 Engine General Information and Diagnosis: 

26

WHT/

BLU

APP sensor signal 
(main)

0.70 – 0.80 V

Ignition switch is at ON 
position and accelerator 
pedal is not depressed 
after warmed up engine.

Output signal varies 
linearly depending on the 
accelerator pedal position.

3.33 – 4.07 V

Ignition switch is at ON 
position and accelerator 
pedal is at fully depressed 
position after warmed up 
engine.

27

ORN

Ground for APP 
sensor (main)

Below 0.3 V

Ignition switch is at ON 
position.

—

28

YEL/

RED

Fuel level sensor 
signal

0 – 6 V

Ignition switch is at ON 
position. (Voltage varies 
depends on fuel level.)

Output signal varies 
linearly depending on the 
fuel level.

29

PPL/

WHT

Serial 
communication line 
of DLC

8 – 14 V

Ignition switch is at ON 
position.

—

30

GRN/

WHT

Brake light switch 
signal

0 – 1 V

Ignition switch is at ON 
position and brake pedal is 
not depressed.

—

10 – 14 V

Ignition switch is at ON 
position and brake pedal is 
depressed.

—

31

BLK/

WHT

Cruise control main 
switch signal 
(if equipped)

0 – 1 V

Ignition switch is at ON 
position and cruise control 
main switch is not pushed.

For details, refer to 
“Inspection of Cruise 
Control System Circuit in 
Section 10A”.

10 – 14 V

Ignition switch is at ON 
position and cruise control 
main switch is kept in 
push.

32

YEL/
GRN

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

0 – 1 V

Ignition switch is at ON 
position and brake pedal is 
depressed.

—

10 – 14 V

Ignition switch is at ON 
position and brake pedal is 
not depressed.

—

33

ORN/

BLU

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

4.5 – 5.5 V

Ignition switch is at ON 
position.

—

34

BLU/
GRN

APP sensor signal 
(sub)

0.37 – 0.38 V

Ignition switch is at ON 
position and accelerator 
pedal is not depressed 
after warmed up engine.

Output signal varies 
linearly depending on the 
accelerator pedal position.

1.66 – 2.03 V

Ignition switch is at ON 
position and accelerator 
pedal is at fully depressed 
position after warmed up 
engine.

35

BLU/

YEL

Ground for APP 
sensor (sub)

Below 0.3 V

Ignition switch is at ON 
position.

—

36

—

—

—

—

—

Terminal 

No.

Wire 

color

Circuit

Normal voltage

Condition

Remarks

Engine General Information and Diagnosis:  1A-214

Reference waveform No.1
Oxygen (1) and heater output (2) signals of heated 
oxygen sensor-2 (Bank-1 and Bank-2):

Reference waveform No.2
Oxygen signal (1) and heater output signal (2) of heated 
oxygen sensor-2:

37

PNK

A/C compressor 
relay output 
(if equipped)

0 – 1 V

A/C switch is at OFF 
position and blower 
selector is at OFF position 
while engine is running.

—

10 – 14 V

A/C switch is at ON 
position and blower 
selector is other than OFF 
position while engine is 
running.

—

38

BLK/

YEL

Ground for cruise 
control command 
switch (if equipped)

Below 1.3 V

Ignition switch is at ON 
position.

For details, refer to 
“Inspection of Cruise 
Control System Circuit in 
Section 10A”.

39

LT GRN

Cruise control 
command switch 
signal (if equipped)

4.5 – 5.5 V

Ignition switch is at ON 
position and cruise control 
command switch are not 
pushed.

40

BLU

Clutch pedal 
position switch 
signal for cruise 
control system 
(if equipped)

0 – 1 V

Ignition switch is at ON 
position and clutch pedal 
is depressed.

10 – 14 V

Ignition switch is at ON 
position and clutch pedal 
is not depressed.

Terminal 

No.

Wire 

color

Circuit

Normal voltage

Condition

Remarks

Measurement 
terminal

Bank-1
CH1: C37-1 or C37-2 to C37-81
CH2: C37-3 to C37-81
Bank-2
CH1: C37-20 or C37-21 to C37-81
CH2: C37-22 to C37-81

Oscilloscope 
setting

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

Measurement 
condition

Engine is running at specified idle 
speed after warmed up engine.

3. One duty cycle

I6JB01110065-02

Measurement 
terminal

Bank-1
CH1: C37-1 or C37-2 to C37-81
CH2: C37-3 to C37-81
CH3: C37-46 to C37-81
Bank-2
CH1: C37-20 or C37-21 to C37-81
CH2: C37-22 to C37-81
CH3: C37-46 to C37-81

Oscilloscope 
setting

CH1: 10 V/DIV, CH2: 500 mV/DIV, 
CH3: 5 V/DIV
TIME: 400 ms/DIV

Measurement 
condition

Engine is racing after warmed up 
engine.

3. Throttle position sensor (main) signal

4. Racing

I6JB01110066-03

1A-215 Engine General Information and Diagnosis: 

Reference waveform No.3
MAF sensor signal (1):

Reference waveform No.4
EVAP canister purge valve Signal:

Reference waveform No.5
EGR valve Signal:

Reference waveform No.6
Fuel injector signal:

Measurement 
terminal

CH1: C37-4 to C37-23
CH2: C37-46 to C37-81

Oscilloscope 
setting

CH1: 1 V/DIV, CH2: 1 V/DIV
TIME: 200 ms/DIV

Measurement 
condition

Engine is racing after warmed up 
engine.

2. Throttle position sensor (main) signal
3. Idle
4. Racing

Measurement 
terminal

CH1: C37-10 to C37-81

Oscilloscope 
setting

CH1: 10 V/DIV
TIME: 40 ms/DIV

Measurement 
condition

Engine is running at specified idle 
speed after warming up.
Set EVAP canister purge valve at 
50% by using “MISC Test” of 
SUZUKI scan tool.

1. ON signal
2. OFF signal
3. One duty cycle

I6JB01110067-04

I6JB01110068-02

Measurement 
terminal

CH1: C37-12 to C37-81
CH2: C37-31 to C37-81
CH3: C37-11 to C37-81
CH4: C37-30 to C37-81

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 is 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

Measurement 
terminal

CH1: C37-15 (No.1), C37-34 (No.2), 
C37-14 (No.3), C37-33 (No.4), C37-
13 (No.5) or C37-32 (No.6) to C37-
81

Oscilloscope 
setting

CH1: 20 V/DIV
TIME: 1 ms/DIV

Measurement 
condition

Engine is running at specified idle 
speed after warmed up engine.

I6JB01110069-02

I6JB01110070-02

Engine General Information and Diagnosis:  1A-216

Reference waveform No.7
Fuel injector No.5 (1), CKP sensor (2) and CMP sensor 
(3) signals:

Reference waveform No.8
Fuel injector No.3 (1), CKP sensor (2) and CMP sensor 
(3) signals:

Reference waveform No.9
Fuel injector No.1 (1), CKP sensor (2) and CMP sensor 
(3) signals:

Measurement 
terminal

CH1: C37-13 to C37-81
CH2: C37-47 to C37-81
CH3: C37-66 to C37-81

Oscilloscope 
setting

CH1: 20 V/DIV, CH2: 5 V/DIV, CH3: 
5 V/DIV
TIME: 20 ms/DIV

Measurement 
condition

Engine is running at specified idle 
speed after warmed up engine.

4. 720

° crank angle

Measurement 
terminal

CH1: C37-14 to C37-81
CH2: C37-47 to C37-81
CH3: C37-66 to C37-81

Oscilloscope 
setting

CH1: 20 V/DIV, CH2: 5 V/DIV,
CH3: 5 V/DIV
TIME: 20 ms/DIV

Measurement 
condition

Engine is running at specified idle 
speed after warmed up engine.

4. 720

° crank angle

I6JB01110071-03

I6JB01110072-02

Measurement 
terminal

CH1: C37-15 to C37-81
CH2: C37-47 to C37-81
CH3: C37-66 to C37-81

Oscilloscope 
setting

CH1: 20 V/DIV, CH2: 5 V/DIV,
CH3: 5 VDIV
TIME: 20 ms/DIV

Measurement 
condition

Engine is running at specified idle 
speed after warmed up engine.

4. 720

° crank angle

I6JB01110073-02