Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 54

1A-163 Engine General Information and Diagnosis: For Petrol Engine Model

DTC P0601 / P0602 / P0607: Internal Control Module Memory Check Sum Error / Control Module 
Programming Error / Control Module Performance

S6JB0A1114055

System Description
Internal control module is installed in ECM.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

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.
3) Start engine and run it at idle if possible.
4) 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: For Petrol Engine Model”.

 

5

A/C refrigerant pressure sensor ground circuit check
1) Turn OFF ignition switch, measure resistance between 

engine ground and “GRY/GRN” wire terminal of A/C 
refrigerant pressure sensor connector.

Is resistance below 5 

Ω

?

Go to Step 7.

Go to Step 6.

6

ECM ground circuit check
1) Remove ECM from its bracket with ECM connectors 

connected.

2) Measure resistance between engine ground and “C37-

57” terminal of ECM connector.

Is resistance below 5 

Ω

?

“GRY/GRN” wire is 
open or high resistance 
circuit.

ECM grounds “C37-58”, 
“C37-48”, “C37-30”, 
“C37-29” and/or “C37-
15” is open or high 
resistance circuit.

7

A/C refrigerant pressure sensor check
1) Check A/C refrigerant pressure sensor referring to “A/C 

Refrigerant Pressure Sensor and Its Circuit Inspection 
(Petrol Engine Model) in Section 7B”

Is it good condition?

Substitute a known-
good ECM and recheck.

Faulty A/C refrigerant 
pressure sensor.

Step

Action

Yes

No

DTC detecting condition

Trouble area

DTC P0601:
Data write error or check sum error
(1 driving cycle detection logic)
DTC P0602:
Data programming error
(1 driving cycle detection logic)
DTC P0607:
Data programming error
(1 driving cycle detection logic)

ECM

Engine General Information and Diagnosis: For Petrol Engine Model 1A-164

DTC P0616: Starter Relay Circuit Low

S6JB0A1114056

Wiring Diagram

DTC Detecting Condition and Trouble Area

Step

Action

Yes

No

1

DTC recheck
1) Clear DTC referring to “DTC Clearance: For Petrol 

Engine Model”.

2) Turn OFF ignition switch.
3) Turn ON ignition switch and check DTC.

Is DTC P0601 or P0607 still indicated?

Go to Step 2.

Intermittent trouble.
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”

2

ECM power and ground circuit check
1) Check that ECM power supply circuit and ECM ground 

circuit is in good condition referring to “ECM Power and 
Ground Circuit Check: For Petrol Engine Model”.

Are check results OK?

Substitute a known-
good ECM and recheck.

Repair ECM power or 
ground circuit.

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

3

7

1

E23-29  

6

BLK/YEL

BLK/YEL

BLK/YEL

C37-22

BLK/WHT

BLK/YEL

BLK/YEL

8

4

WHT/GRN

WHT/RED

5

BLK/RED

[A]: BLK/RED
[B]: BLK

BLK

C37-15  

C37-29  
C37-48  

BLK/ORN

C37-58  

C37-30  BLK/ORN

BLK/YEL
BLK/YEL
BLK/YEL

9

10

BLK/YEL

2

11

I5JB0A110062-02

[A]: For A/T model

4. Fuse box No.2

9. “STR MOT” fuse

[B]: For M/T model

5. Transmission range switch (for A/T model)

10. “IGN” fuse

1. ECM

6. Starting motor control relay

11. Starting motor magnet switch

2. Starter motor

7. “IG COIL” fuse

3. Ignition switch

8. “ST SIG” fuse

DTC detecting condition

Trouble area

Engine starts even though vehicle is at stop and engine 
starter signal is low voltage.
(2 driving cycle detection logic)

• Engine starter signal circuit
• ECM

1A-165 Engine General Information and Diagnosis: For Petrol Engine Model

DTC Confirmation Procedure

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

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”.

 

DTC P0617: Starter Relay Circuit High

S6JB0A1114057

Wiring Diagram
Refer to “DTC P0616: Starter Relay Circuit Low: For Petrol Engine Model”.

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) Start engine and run it at idle for 3 min. or more.
4) Check DTC and pending DTC.

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

Signal circuit check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors 

connected.

3) Measure voltage at terminal “C37-22” of ECM connector, 

under following condition.

Voltage at terminal “C37-22” of ECM connector
While engine cranking: 6 – 14 V
After starting engine: 0 – 1 V

Is each voltage within specified range?

Poor “C37-22” 
connection or 
intermittent trouble.
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”.
If wire and connections 
are OK, substitute a 
known-good ECM and 
recheck.

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

DTC detecting condition

Trouble area

Engine starter signal is high voltage for 180 seconds 
continuously while engine is running.
(2 driving cycle detection logic)

• Engine starter signal circuit
• ECM

Engine General Information and Diagnosis: For Petrol Engine Model 1A-166

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

Starter signal check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors 

connected.

3) Start engine, measure voltage between “C37-22” 

terminal of ECM connector and vehicle body ground.

Is voltage 0 – 1 V?

Intermittent trouble. 
Check for intermittent 
referring to “Intermittent 
and Poor Connection 
Inspection in Section 
00”. If OK, substitute a 
known-good ECM and 
recheck.

Go to Step 3.

3

Wire circuit check
1) Disconnect starting motor control relay in fuse box No.2 

with ignition switch turned OFF.

2) Check for proper connection to starting motor control 

relay at “BLK/YEL”, “BLK/RED” and “BLK” (for M/T 
model) wire terminals.

3) Disconnect connector from starting motor.
4) Measure voltage between “C37-22” terminal of ECM 

connector and vehicle body ground with ignition switch 
turned ON.

Is voltage 0 – 1 V?

Go to Step 4.

“BLK/YEL” wire is 
shorted to power circuit.
If wires are OK, 
substitute a known good 
ECM and recheck.

4

Wire circuit check
1) Measure voltage between “BLK/YEL” wire terminal for 

coil side of starting motor control relay connector coil 
side and vehicle body ground with ignition switch turned 
ON.

Is voltage 0 – 1 V?

Check starting motor 
control relay. If OK, 
substitute a known-
good ECM and recheck.

Check ignition switch 
referring to “Ignition 
Switch Inspection in 
Section 9C”.
If ignition switch is OK, 
check for short circuit 
between ignition switch 
and starting motor 
control relay to power 
circuit.