Suzuki Grand Vitara JB416 / JB420. Manual - part 74

1A-245 Engine General Information and Diagnosis: 

Fuel Pressure Check

S5JB0A1104067

System Diagram

Special tool
(A):  09912–58442
(B):  09912–58432
(C):  09912–58490

4

(C)

(B)

(A)

1

2

3

I2RH01110133-01

1. Injector

2. Delivery pipe

3. Fuel pressure regulator

4. Fuel filter and fuel pump

Engine General Information and Diagnosis:  1A-246

Troubleshooting

NOTE
Before using following flow, check to make sure that battery voltage is higher than 11 V. If battery 
voltage is low, pressure becomes lower than specification even if fuel pump and line are in good 
condition.

 

Step

Action

Yes

No

1

Fuel pump operating sound check
1) Remove fuel filler cap and then turn ON ignition switch.

Can you hear operating sound?

Go to Step 2.

Go to “Fuel Pump and 
Its Circuit Check”.

2

Fuel pressure check
1) Check fuel pressure referring to “Fuel Pressure 

Inspection in Section 1G”.

Is check result satisfactory?

Go to Step 3.

Go to Step 6.

3

Fuel pressure check
1) Start engine and warm it up to normal operating 

temperature.

2) Keep engine speed at 4000 rpm.

Does fuel pressure show about the same value as Step 2?

Go to Step 4.

Go to Step 8.

4

Fuel line check
1) Check fuel pipe, fuel hose and joint for fuel leakage.

Are they in good condition?

Go to Step 5.

Repair or replace 
defective part.

5

Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or 

deform.

Are they in good condition?

Faulty fuel pressure 
regulator.

Repair or replace 
damaged or damaged 
part.

6

Was fuel pressure higher than specification in Step 2?

Go to Step 7.

Go to Step 8.

7

Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or 

deform.

Are they in good condition?

Faulty fuel pressure 
regulator.

Repair or replace 
damaged or damaged 
part.

8

Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or 

deform.

Are they in good condition?

Clogged fuel filter, faulty 
fuel pump, faulty fuel 
pressure regulator or 
fuel leakage from hose 
connection in fuel tank.

Repair or replace 
defective part.

1A-247 Engine General Information and Diagnosis: 

A/C System Circuits Check

S5JB0A1104069

Wiring Diagram

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

5V

RED/BLK

E23-46  

E23-47  

BLU/RED

BLU/YEL

BLU/BLK

E23-48  

PPL/YEL

GRY/GRN

C37-24  
C37-57  

BLK

RED

YEL/GRN

RED/YEL

BLK

BLU

BLU

BLU/WHT

YEL/GRN

5V

WHT/BLU

WHT/RED

E23-4

E23-19

RED

WHT

WHT/BLU

WHT/RED

RED

WHT

5V

PNK/GRN

YEL/RED

WHT/BLK

BLK/RED

12V

PNK

*RED

GRY/RED

GRY/BLK

C37-14  
C37-12  

WHT/RED

E23-49  

YEL/GRN

YEL/GRN

5V

1

2

4

9

11

12

15

16

5

8

14

13

7

10

3

6

I5JB0A110103-02

1. BCM

6. “IG2 SIG” fuse

11. Radiator cooling fan relay No.2

16. ECT sensor

2. ABS hydraulic unit / control 

module assembly

7. “CPRSR” fuse

12. Radiator cooling fan relay No.3

*: For M16 engine

3. HVAC control module

8. Compressor relay

13. Radiator cooling fan No.1

4. ECM

9. Compressor

14. Radiator cooling fan No.2

5. Evaporator temperature sensor

10. Radiator cooling fan relay No.1

15. A/C refrigerant pressure sensor

Engine General Information and Diagnosis:  1A-248

Troubleshooting

NOTE

• Before performed troubleshooting, be sure to read the “Precautions of ECM Circuit Inspection”.
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the 

special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits”.

• When A/C evaporator outlet air temp. is below 0 

°C (32 °F) (for J20 engine) or 1.3 °C (34.3 °F) (for M16 

engine), A/C remains OFF (“E23-49” terminal voltage becomes 10 – 14 V). This condition is not 
abnormal.

 

Step

Action

Yes

No

1

Reception data check from BCM
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Turn ON ignition switch.
3) Check DTC for reception data from BCM.

Is there DTC P1678?

Go to applicable DTC 
diag. flow.

Go to Step 2.

2

DTC check of HVAC control module
1) Check HVAC control module for DTC.

Is there DTC(s)?

Go to applicable DTC 
diag. flow.

Go to Step 3.

3

A/C switch signal circuit check
1) Start engine and select “DATA LIST” mode on scan tool.
2) Check A/C switch signal under following conditions 

respectively.

A/C switch signal 
Engine running, A/C switch OFF: OFF
Engine running, A/C switch ON and blower speed 
selector turned 1st position or more: ON

Is check result satisfactory?

Go to Step 4.

Check HVAC control 
module and its circuit.

4

DTC check of ECT sensor circuit
1) Check ECM for DTC of ECT sensor circuit.

Is there DTC P0116, DTC P0117 or DTC P0118?

Go to applicable DTC 
diag. flow.

Go to Step 5.

5

Radiator cooling fan control system check

Is radiator cooling fan started when A/C and blower speed 
selector switch are turned ON with engine running?

Go to Step 11.

Go to Step 6.

6

Radiator cooling fan control circuit check
1) Check DTC with scan tool.

Is DTC P0480 displayed?

Go to “DTC P0480: Fan 
1 (Radiator Cooling 
Fan) Control Circuit”.

Go to Step 7.

7

Evaporator temperature sensor check
1) Check evaporator temperature sensor referring to “A/C 

Evaporator Temperature Sensor Inspection in Section 
7B”.

Is resistance within specification?

Go to Step 8.

Faulty evaporator 
temperature sensor.

8

DTC check of A/C refrigerant pressure sensor circuit
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Turn ON ignition switch.
3) Check ECM for DTC of A/C refrigerant pressure sensor 

circuit.

Is there DTC P0532 or DTC P0533?

Go to applicable DTC 
diag. flow.

Go to Step 9.