Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 47

1A-135 Engine General Information and Diagnosis: For Petrol Engine Model

3

Wire harness and connection check
1) Disconnect connector from CKP sensor with ignition 

switch turned OFF.

2) Check for proper connection to CKP sensor at “BLU/

BLK”, “WHT/BLU” and “BLK/YEL” wire terminals.

3) If OK, turn ON ignition switch and check voltage at “BLU/

BLK”, “WHT/BLU” and “BLK/YEL” wire terminals of 
disconnected CKP sensor connector.

CKP sensor voltage
Terminal “B+”: 10 – 14 V
Terminal “Vout”: 4 – 5 V
Terminal “GND”: 0 V

Is check result satisfactory?

Go to Step 7.

Go to Step 4.

4

Was terminal “Vout” voltage in Step 3 within specification?

Go to Step 5.

“WHT/BLU” wire is open 
or shorted to ground / 
power supply circuit.
If wire and connection 
are OK, substitute a 
known-good ECM and 
recheck.

5

Ground circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between “BLK/YEL” wire terminal of 

CKP sensor connector and engine ground.

Is measured resistance value less than 3 

Ω

?

Go to Step 6.

“BLK/YEL” wire is open 
or high resistance.

6

Was terminal “B+” voltage in Step 3 within specification?

Go to Step 7.

“BLU/BLK” wire is open 
circuit. If wire and 
connection are OK, 
substitute a known-
good ECM and recheck.

7

Engine start signal check
1) Check starting motor circuit for opening and short 

referring to Step 2 of “DTC P0616: Starter Relay Circuit 
Low: For Petrol Engine Model” and Step 3 and 4 of “DTC 
P0617: Starter Relay Circuit High: For Petrol Engine 
Model”.

Is check result satisfactory?

Go to Step 8.

Repair or replace.

Step

Action

Yes

No

I2RH0B110048-01

Engine General Information and Diagnosis: For Petrol Engine Model 1A-136

8

CKP sensor check
1) Check CKP sensor and sensor plate tooth referring to 

“Camshaft Position (CMP) Sensor Inspection: For Petrol 
Engine Model in Section 1C”.

Is check result satisfactory?

Substitute a known-
good ECM and recheck.

Replace CKP sensor 
and/or sensor plate.

Step

Action

Yes

No

1A-137 Engine General Information and Diagnosis: For Petrol Engine Model

DTC P0340: Camshaft Position (CMP) Sensor Circuit

S6JB0A1114043

Wiring Diagram

System Description
The CMP sensor located on the transmission side of cylinder head (for M16 engine) or cylinder head cover (for J20 
engine) consists of the signal generator (magnetic sensor) and signal rotor (intake camshaft portion).
The signal generator generates reference signal through slits in the slit plate which turns together with the camshaft.

Reference signal
The CMP sensor generates 6 pulses of signals each of which has a different waveform length while the camshaft 
makes one full rotation. Refer to “Inspection of ECM and Its Circuits: For Petrol Engine Model”.
Based on these signals, ECM judges which cylinder piston is in the compression stroke and the engine speed.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Crank engine for 5 sec.
4) Check DTC and pending DTC.

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

12V

5V

BLU/BLK

BLU/BLK

BLK/RED

BLK/RED

BLK/RED

BLU

5

6

4

8

3

E23-29  

E23-1  

E23-60  

7

E23-16  

1

C37-52       

5V

BLK/YEL

BLK/WHT

9

WHT/GRN

2

WHT/RED

BLU/BLK

BLU/BLK

BLK/YEL

C37-15  

C37-29  
C37-48  

BLK/ORN

C37-58  

C37-30  BLK/ORN

BLK/YEL
BLK/YEL
BLK/YEL

I5JB0A110049-01

1. CMP sensor

3. ECM

5. Ignition switch

7. “FI” fuse

9. “IGN” fuse

2. Signal rotor

4. Main relay

6. Fuse box No.2

8. “IG COIL” fuse

DTC detecting condition

Trouble area

• CMP sensor pulse is less than 20 pulses per crankshaft 8 revolutions
• CMP sensor pulse is more than 28 pulses per crankshaft 8 revolutions
• CMP sensor pulse is less than 20 pulses between BTDC 155

° crank 

angle (for M16 engine) or BTDC 75

° crank angle (for J20 engine) and 

BTDC 5

° crank angle with crankshaft 8 revolutions from engine start.

(1 driving cycle detection logic)

• CMP sensor circuit open or short
• Signal rotor teeth damaged
• CMP sensor malfunction, foreign 

material being attached or improper 
installation

• ECM

Engine General Information and Diagnosis: For Petrol Engine Model 1A-138

DTC Troubleshooting

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

 

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: For 
Petrol Engine Model”.

2

CMP sensor and connector for proper installation check

Is CMP sensor installed properly and connector connected 
securely?

Go to Step 3.

Correct.

3

Wire harness and connection check
1) Disconnect connector from CMP sensor.
2) Check for proper connection to CMP sensor at “BLU/

BLK”, “WHT/RED” and “BLK/YEL” wire terminals.

3) If OK, turn ON ignition switch and check voltage at “BLU/

BLK”, “WHT/RED” and “BLK/YEL” wire terminals of 
disconnected CMP sensor connector.

CMP sensor voltage
Terminal “B+”: 10 – 14 V
Terminal “Vout”: 4 – 5 V
Terminal “GND”: 0 V

For J20 engine

For M16 engine

Is check result satisfactory?

Go to Step 7.

Go to Step 4.

I5JB0A110050-01

I4RS0B110094-01