Suzuki Grand Vitara JB416 / JB420. Manual - part 66

1A-213 Engine General Information and Diagnosis: 

DTC Confirmation Procedure
DTC P2227:

WARNING

!

 

• When performing a road test, select a place where there is no traffic or possibility of a traffic 

accident and be very careful during testing to avoid occurrence of an accident.

• Road test should be carried out by 2 persons, a driver and a tester, on a level road.

 

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and warm up 

engine to normal operating temperature.

3) Check DTC and pending DTC by using scan tool.

DTC P2228 / P2229:

1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch, clear DTC by using scan tool and run engine for 1 min.
3) Check DTC and pending DTC by using scan tool.

DTC Troubleshooting

NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to 
“Precautions For DTC Troubleshooting”.

 

Step

Action

Yes

No

1

Was “Engine and Emission Control System Check” 
performed?

Go to Step 2.

Go to “Engine and 
Emission Control 
System Check”.

2

Is DTC P2227 set?

Go to Step 3.

Substitute a known-
good ECM and recheck.

3

MAP sensor check
1) Check MAP sensor and its circuit referring to “DTC 

P0107: Manifold Absolute Pressure Circuit Low 
Input”and/or “DTC P0108: Manifold Absolute Pressure 
Circuit High Input”.

Is check result satisfactory?

Substitute a known-
good ECM and recheck.

MAP sensor or its circuit 
malfunction.

Engine General Information and Diagnosis:  1A-214

Inspection of ECM and Its Circuits

S5JB0A1104063

ECM and its circuits can be checked by measuring voltage, pulse signal and resistance with special tool connected.

CAUTION

!

 

ECM cannot be checked by itself. It is strictly prohibited to connect voltmeter or ohmmeter to ECM 
with ECM connectors disconnected from it.

 

Voltage Check

1) Remove ECM (1) from its bracket referring to “Engine Control Module (ECM) Removal and Installation in Section 

1C”.

2) Connect special tool between ECM and ECM connectors securely.

Special tool
(A):  09933–06320

3) Check voltage and/or pulse signal using voltmeter (2) and oscilloscope (3).

NOTE

• As each terminal voltage is affected by battery voltage, confirm that it is 11 V or more when ignition 

switch is turned ON.

• Voltage with asterisk (*) cannot be measured with voltmeter because it is pulse signal. Use 

oscilloscope for its check if necessary.

• Before performed this inspection, be sure to read the “Precautions of ECM Circuit Inspection”.

 

Viewed from harness side

1

2

3

(A)

I5JB0A110073-01

E23

C37

3

4

18

19

5

6

7

10

11

17

20

47

46

49

50

51

21

22

52

16

25

9

24

14
29

55

57

54 53

59

60

58

2

26

27

28

15
30

56

48

32

31

34

35

36

37

40

42

39 38

44

45

43

41

33

1

12

13

23

8

3

4

18

19

5

6

7

10

11

17

20

47

46

49

50

51

21

22

52

16

25

9

24

14
29

55

57

54 53

59

60

58

2

26

27

28

15
30

56

48

32

31

34

35

36

37

40

42

39 38

44

45

43

41

33

1

12

13

23

8

I4RS0A110055-01

1A-215 Engine General Information and Diagnosis: 

Terminal 

No.

Wire 

color

Circuit

Normal voltage

Condition

Remarks

C37-1

PNK

Fuel injector No.1

10 – 14 V

Ignition switch turned ON.

—

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference 

waveform No.1: ”, 

“Reference waveform 

No.2: ” and 

“Reference waveform 

No.31: ”)

Engine running at idle 
after warmed up engine.

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

C37-2

PNK/

BLK

Fuel injector No.2

10 – 14 V

Ignition switch turned ON.

—

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference 

waveform No.1: ” and 
“Reference waveform 

No.3: ”)

Engine running at idle 
after warmed up engine.

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

C37-3

YEL/
GRN

EGR valve 
(stepper motor coil 
3)

10 – 14 V

Ignition switch turned ON.

—

*0 – 1 V

↑↓

10 – 14 V

(“Reference 

waveform No.4: ”)

Ignition switch is turned to 
ST (cranking) position.

Output signal is active low 
duty pulse. Number of 
pulse generated times 
varies depending on 
vehicle condition.

C37-4

YEL

EGR valve 
(stepper motor coil 
4)

10 – 14 V

Ignition switch turned ON.

—

*0 – 1 V

↑↓

10 – 14 V

(“Reference 

waveform No.4: ”)

Ignition switch is turned to 
ST (cranking) position.

Output signal is active low 
duty pulse. Number of 
pulse generated times 
varies depending on 
vehicle condition.

C37-5

YEL/

BLK

EGR valve 
(stepper motor coil 
1)

10 – 14 V

Ignition switch turned ON.

—

*0 – 1 V

↑↓

10 – 14 V

(“Reference 

waveform No.4: ”)

Ignition switch is turned to 
ST (cranking) position.

Output signal is active low 
duty pulse. Number of 
pulse generated times 
varies depending on 
vehicle condition.

C37-6

YEL/

RED

EGR valve 
(stepper motor coil 
2)

10 – 14 V

Ignition switch turned ON.

—

*0 – 1 V

↑↓

10 – 14 V

(“Reference 

waveform No.4: ”)

Ignition switch is turned to 
ST (cranking) position.

Output signal is active low 
duty pulse. Number of 
pulse generated times 
varies depending on 
vehicle condition.

C37-7

BLU/
ORN

Power steering 
pump pressure 
switch signal

10 – 14 V

Ignition switch turned ON.

—

0 – 1 V

With engine at idle speed, 
turning steering wheel to 
the right or left as far as it 
stops.

C37-8

BRN/

RED 

(for M16 

engine)

BRN/

BLK (for 

J20 

engine)

Generator field coil 
monitor signal

10 – 14 V

Ignition switch turned ON.

Signal is duty pulse. Duty 
ratio varies depending on 
vehicle condition.

*0 – 1 V

↑↓

10 – 14 V

(“Reference 

waveform No.5: ” and 
“Reference waveform 

No.6: ”)

Engine running at idle 
after warmed up engine.

Engine General Information and Diagnosis:  1A-216

C37-9

BLU

Electric load 
current sensor 
signal (for J20 
engine)

0.5 – 1.0 V

Ignition switch turned ON.

—

1.3 – 1.7 V

Run engine at 2000 rpm, 
headlight switch turned 
ON.

1.8 – 2.4 V

Run engine at 2000 rpm, 
headlight switch ON and 
blower selector at HI 
position.

C37-10

GRN/

WHT

CO adjusting 
resistor signal (for 
J20 engine, if 
equipped)

0 – 5 V

Ignition switch turned ON.

—

C37-11

RED

Oxygen signal of 
heated oxygen 
sensor-2

4 – 5 V

Ignition switch turned ON.

—

*Approx. 0.15 V

(“Reference 

waveform No.7: ” and 
“Reference waveform 

No.8: ”)

Engine running at idle 
after warmed up engine.

C37-12

GRY/

BLK

A/C refrigerant 
pressure sensor 
signal (if equipped 
with A/C)

1.38 – 1.52 V

Engine running, A/C 
switch OFF and blower 
selector at OFF position, 
A/C refrigerant pressure: 
800 kPa (116 psi)

—

2.15 – 2.38 V

Engine running, A/C 
switch ON and blower 
selector at 1st position or 
more, A/C refrigerant 
pressure: 1400 kPa (203 
psi)

2.67 – 2.95 V

Engine running, A/C 
switch ON and blower 
selector at 1st position or 
more, A/C refrigerant 
pressure: 1800 kPa (261 
psi)

C37-13

GRN/

BLK

EVAP canister 
purge valve output

10 – 14 V

Ignition switch turned ON 
with engine at stop.

—

*0 – 0.6 V

↑↓

10 – 14 V

(“Reference 

waveform No.9: ”)

Set EVAP canister purge 
valve at 52% by using 
“Misc Test” of scan tool.

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

C37-14

GRY/

RED

Output of 5 V 
power source for 
MAP sensor, A/C 
refrigerant 
pressure sensor, 
electric load 
current sensor (for 
J20 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.

—

Terminal 

No.

Wire 

color

Circuit

Normal voltage

Condition

Remarks