Suzuki Grand Vitara JB416 / JB420 (ESP model). Service manual — part 8

1A-28 Engine General Information and Diagnosis:

Malfunction Indicator Lamp Remains ON after Engine Starts

S5JB0E1104012

Wiring Diagram
Refer to “Malfunction Indicator Lamp Does Not Come ON with Ignition Switch ON and Engine Stop (but Engine Can
Be Started)”.

Circuit Description
When the ignition switch is turned ON, ECM causes the main relay to turn ON (close the contact point). Then, ECM
being supplied with the main power, transmits indication ON signal of malfunction indicator lamp (MIL) to combination
meter in order to turn MIL ON. And then, combination meter turns MIL ON. When the engine starts to run and no
malfunction is detected in the system, ECM transmits MIL indication OFF signal to combination meter in order to turn
MIL OFF. And then, combination meter turns MIL OFF, but if a malfunction was or is detected, MIL remains ON even
when the engine is running.

Troubleshooting

NOTE

• Before performed troubleshooting, be sure to read the “Precautions of ECM Circuit Inspection in

related manual”.

• 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”.

8

Combination meter circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between “G28-15” terminal of

combination meter connector and vehicle body ground.

Is resistance 1

Ω

or less?

Substitute a known-
good combination meter
and recheck. If MIL still
remains OFF, substitute
a known-good ECM and
recheck.

“BLK” wire is open or
high resistance circuit.

Step

Action

Yes

No

Step

Action

Yes

No

1

DTC check
1) Start engine and recheck DTC of ECM and TCM (for A/T

model) while engine running.

Is there any DTC(s)?

Go to Step 2 of “Engine
and Emission Control
System Check in related
manual”, Step 2 of “A/T
System Check in
Section 5A in related
manual”.

Go to Step 2.

2

CAN communication line circuit check
1) Check CAN communication line circuit between

combination meter and ECM, TCM (for A/T model), ABS
/ ESP

® control module, 4WD control module (if

equipped), keyless start control module (if equipped)
referring to Step 9 to 15 “DTC P1674: CAN
Communication (Bus Off Error)”.

Is circuit in good condition?

Substitute a known-
good combination meter
and recheck. If MIL still
remains ON, substitute
a known-good ECM and
recheck.

Repair or replace CAN
communication circuit.

Engine General Information and Diagnosis: 1A-29

DTC P0500: Vehicle Speed Sensor (VSS) Malfunction

S5JB0E1104051

Wiring Diagram

DTC Detecting Condition and Trouble Area

E23-4

E23-19

WHT/RED

WHT/BLU

WHT/RED

WHT/BLU

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

BLK

WHT

BLK

WHT

YEL/BLK

YEL

LT GRN
LT GRN/BLK

12V

12V

1

2

3

4

I5JB0A110060-03

1. Rear left side wheel speed sensor (VSS 1)

3. ABS / ESP

® control module

2. Rear right side wheel speed sensor (VSS 2)

4. ECM

DTC detecting condition

Trouble area

• Vehicle speed signal is not input while fuel is cut at

deceleration for 4 seconds continuously at 3600 rpm or
less.

• Vehicle speed signal is not input even if engine is running

with more than 3700 rpm at D-Range for 4 sec. (for A/T
model).

(2 driving cycle detection logic)

• Wheel speed sensor (VSS)
• Wheel speed sensor circuit
• ABS / ESP

® control module

• ECM

1A-30 Engine General Information and Diagnosis:

DTC Confirmation Procedure

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.

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Warm up engine to normal operating temperature.
4) Drive vehicle at 4000 rpm (engine speed) with 3rd gear (for M/T vehicle) or “3” range (for A/T vehicle).
5) Release accelerator pedal and with engine brake applied, keep vehicle coasting for 6 sec. or more (fuel cut

condition for 5 sec. or more) and stop vehicle.

6) For A/T model, drive vehicle at more than 3700 rpm for 10 sec.
7) Check pending DTC and DTC.

DTC Troubleshooting

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

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 in related
manual”.

2

Vehicle speed signal check

Is vehicle speed displayed on scan tool in Step 4) and 5) of
“DTC Confirmation Procedure”?

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

Go to Step 3.

3

DTC check in ABS / ESP

® control module

1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Check ABS / ESP

® control module for DTC.

Is there any DTDC(s) in ABS / ESP

®

control module?

Go to applicable DTC
diag. flow.

Substitute a known-
good ECM and recheck.

Engine General Information and Diagnosis: 1A-31

DTC P1603: TCM Trouble Code Detected (For J20 Engine)

S5JB0E1104063

Wiring Diagram

DTC Detecting Condition
When ECM receives a trouble code from TCM, which indicates that some problem occurred in sensor circuits and its
calculated values used for operations such as idle speed control, engine power control, and so on by TCM, ECM sets
DTC P1603. (TCM outputs the trouble code to ECM when TCM can not compute the engine control signal due to
malfunctions of sensor circuits used for gear shift control.)

DTC Troubleshooting

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

WHT/BLU

WHT/RED

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

E23-4

E23-19

1

RED

WHT

E03-12

E03-6

WHT/BLU

WHT/RED

E03-8

E03-10

RED

WHT

E92-7

E92-17

2

3

I5JB0A110067-02

1. ECM

2. TCM (for A/T model)

3. ABS / ESP

® control module

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 in related
manual”.

2

DTC check
1) Check DTC of TCM referring to “DTC Check in Section

5A in related manual”.

Is there any DTC(s)?

Go to applicable DTC
diag. flow.

Substitute a known-
good ECM and recheck.