Suzuki Grand Vitara JB627. Manual - part 47

1A-137 Engine General Information and Diagnosis: 

DTC Confirmation Procedure

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC by using scan tool if any.
3) Check 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”.

• When DTC P0107 is indicated together, it is possible that sensor power supply circuit is open.
• When DTC P0108 is indicated together, it is possible that sensor power supply circuit is shorted to 

power circuit and/or sensor ground circuit is open.

 

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

S6JB0B1104051

System Description
Internal control module is installed in ECM.

NOTE
After reprogramming of ECM is executed, if the DTC P0601 and/or P0602 are indicated, it is possible 
that the reprogramming of ECM is not completed correctly.

 

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) With ignition switch OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC by using scan tool if any.
3) Start engine and run it at idle if possible.
4) Check DTC by using scan tool.

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

A/C refrigerant pressure sensor and its circuit check
1) Check A/C refrigerant pressure sensor and its circuit for 

condition referring to “A/C Refrigerant Pressure Sensor 
and Its Circuit Inspection in Section 7B”.

Is it in good condition?

Substitute a known 
good ECM and recheck.

Repair or replace 
defective parts.

DTC detecting condition

Trouble area

DTC P0601: Internal Control Module Memory Check Sum 
Error
Data write error or check sum error
(1 driving cycle detection logic)

• ECM

DTC P0602: Control Module Programming Error 
Data programming error
(1 driving cycle detection logic)
DTC P0607: Control Module Performance 
Internal processor error
(1 driving cycle detection logic)

Engine General Information and Diagnosis:  1A-138

DTC Troubleshooting

DTC P0616 / P0617: Starter Relay Circuit Low / High

S6JB0B1104052

Wiring Diagram

Circuit Description
Engine start signal is sent from engine starter circuit while engine cranking.

Step

Action

Yes

No

1

DTC recheck
1) Clear DTC referring to “DTC Clearance”
2) Turn off ignition switch.
3) Turn on ignition switch and check DTC.

Is DTC P0601, P0602 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 reprogramming check

Was reprogramming of ECM executed?

Execute reprogramming 
of ECM correctly once 
again.

Go to Step 3.

3

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”.

Are checking results OK?

Substitute a known 
good ECM and recheck.

Repair ECM power or 
ground circuit.

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E23

C37

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C37-59

C37-58

C37-39

C37-73

C37-80

BLK/YEL

BLK/ORN

BLK/ORN

BLK/YEL
BLK/YEL

BLK/ORN

C37-81

12V 5V

BLU/BLK
BLU/BLK

BLK/RED

BLK/RED

BLK/RED

BLU

E23-29

E23-2
E23-3

E23-16

BLK/YEL

BLK/YEL

BLK/YEL

BLK/WHT

BLK/YEL

BLK/YEL

[A]: BLK/RED

WHT/RED

BLK/RED

BLK

BLU/BLK

C37-28

[B]: BLK

WHT/GRN

BLK/YEL

WHT/RED

BLU/BLK

C37-66

BLK/YEL

S

I6JB01110046-03

[A]: For A/T model

3. Ignition switch

8. “ST SIG” fuse

13. CMP sensor

[B]: For M/T model

4. Fuse box No.2

9. “STR MOT” fuse

14. Signal rotor

S: Start signal circuit

5. Transmission range switch (A/T model)

10. “IGN” fuse

15. “FI” fuse

1. ECM

6. Starting motor control relay

11. Starting motor magnet clutch

2. Starter motor

7. “IG CIOL” fuse

12. Main relay

1A-139 Engine General Information and Diagnosis: 

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

NOTE
Before performing troubleshooting of DTC P0616, make sure that DTC of VSS is not detected.

 

1) With ignition switch OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC by using scan tool if any.
3) Start engine and run it for 1 minute.
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”.

 

DTC detecting condition

Trouble area

P0616: Starter Relay Circuit Low
No starter switch signal is inputted for 20 sec. or more even though there is 
CMP sensor input with vehicle speed at 2 km/h or less.
(2 driving cycle detection logic)

• Engine start signal circuit
• ECM

P0617: Starter Relay Circuit High
There is starter switch input for 180 sec. or more even though engine operates 
at 600 rpm or more.
(2 driving cycle detection logic)

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

Engine start signal check
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Turn ignition switch to ON position.
3) Check engine start signal of “Starter SW” under “Data 

List” displayed on scan tool.
• Ignition switch is at “START” position: “ON”.
• Ignition switch is at other than “START” position: 

“OFF”.

Does “Starter SW” signal correctly?

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

Go to Step 3.

3

Engine start signal check
1) Disconnect connectors from ECM with ignition switch 

turned OFF.

2) Check that circuit voltage between start signal terminal 

of ECM connector and vehicle body ground.
• Ignition switch is at “START” position: 8 – 14 V
• Ignition switch is at other than “START” position: 0 – 1 

V

Is it in good condition?

Substitute a known 
good ECM and recheck.

Repair or replace start 
signal circuit.

Engine General Information and Diagnosis:  1A-140

DTC P0645: A/C Clutch Relay Control Circuit

S6JB0B1104053

Wiring Diagram

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 by using scan tool if any.
3) Start engine and then operate A/C system.
4) Check DTC by using scan tool.

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E23

C37

PNK

WHT/RED

E23-37

YEL/GRN

GRN/WHT

BLK/RED

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C

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I6JB01110047-03

P: A/C compressor relay power supply circuit

2. A/C compressor

5. Ignition switch

C: A/C compressor relay control circuit

3. ECM

6. “IG2 SIG” fuse

1. A/C compressor relay (included in integration relay)

4. “CPRSR” fuse

DTC detecting condition

Trouble area

Monitor signal of A/C compressor relay is different from command signal.
(1 driving cycle detection logic)

• A/C compressor relay and its circuit
• ECM