Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 61

1A-191 Engine General Information and Diagnosis: For Petrol Engine Model

5

ECM power and ground circuit check
1) Check ECM power and ground circuits referring to “ECM 

Power and Ground Circuit Check: For Petrol Engine 
Model”.

Are they in good condition?

Go to Step 6.

Repair ECM power and/
or ground circuits.

6

DTC check in ABS / ESP

® control module 

1) Check DTC U1073 in ABS / ESP

® control module.

Is it indicated?

• For vehicle without 

ESP

®, go to “DTC 

U1073: Control 
Module 
Communication Bus 
Off (Petrol Engine 
Model) in Section 
4E”.

• For vehicle with 

ESP

®, go to “DTC 

U1073: Control 
Module 
Communication Bus 
Off in Section 4F”.

Go to Step 7.

7

CAN communication circuit check
1) Disconnect connectors from ABS or ESP

® control 

module and ECM.

2) Check that CAN communication circuit is as follows.

• Circuit resistance of CAN communication circuit is 

less than 1 

Ω between “WHT/RED” terminal of ECM 

connector and “WHT/RED” terminal of ABS or ESP

® 

connector.

• Circuit resistance of CAN communication circuit is 

less than 1 

Ω between “WHT/BLU” terminal of ECM 

connector and “WHT/BLU” terminal of ABS / ESP

® 

control module connector.

Is it in good condition?

Go to Step 9.

Go to Step 8.

8

CAN communication circuit check
1) Connect connector to ABS or ESP

® control module with 

ignition switch turned OFF.

2) Measure resistance at following connector terminals.

• Between “WHT/BLU” and “WHT” terminals of ABS or 

ESP

® control module connector.

• Between “WHT/RED” and “RED” terminals of ABS or 

ESP

® control module connector.

Is resistance below 1 

Ω

?

CAN communication 
circuit wire between 
ABS or ESP

® control 

module and ECM 
connector is open or 
high resistance.

Substitute a known-
good ABS or ESP

® 

control module 
assembly and recheck.

9

DTC check in ECM
1) Connect connectors to ABS or ESP

® control module 

and ECM with ignition switch turned OFF.

2) Disconnect connector from BCM with ignition switch 

turned OFF.

3) Check ECM for DTC(s).

Is there DTC P1685?

Go to Step 8.

CAN communication 
circuit wire between 
BCM and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, check 
BCM power and ground 
circuits. If circuits are 
OK, substitute a known-
good BCM and recheck.

Step

Action

Yes

No

Engine General Information and Diagnosis: For Petrol Engine Model 1A-192

10 DTC check in ECM

1) Disconnect connectors from TCM (for A/T model) with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1685?

Go to Step 9.

CAN communication 
circuit wire between 
TCM and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, check 
TCM power and ground 
circuits. If circuits are 
OK, substitute a known-
good TCM (for A/T 
model) and recheck.

11 DTC check in ECM

1) Disconnect connector from keyless start control module 

(if equipped) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1685?

Go to Step 10.

CAN communication 
circuit wire between 
keyless start control 
module and CAN circuit 
junction connector is 
open or high resistance. 
If wires are OK, check 
keyless start control 
module power and 
ground circuit. If circuit 
are OK, substitute a 
known-good keyless 
start control module and 
recheck.

12 DTC check in ECM

1) Disconnect connector from combination meter with 

ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1685?

Go to Step 11.

CAN communication 
circuit wire between 
combination meter and 
CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, check 
combination meter 
power and ground 
circuits. If circuits are 
OK, substitute a known-
good combination meter 
and recheck.

13 DTC check in ECM

1) Disconnect connector from 4WD control module (if 

equipped) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1685?

Go to Step 12.

CAN communication 
circuit wire between 
4WD control module 
and CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, check 4WD 
control module power 
and ground circuits. If 
circuits are OK, 
substitute a known-
good 4WD control 
module and recheck.

Step

Action

Yes

No

1A-193 Engine General Information and Diagnosis: For Petrol Engine Model

14 DTC check

1) Disconnect connector from steering angle sensor 

(vehicle with ESP

®) with ignition switch turned OFF.

2) Check ECM for DTC.

Is there DTC P1685?

Go to Step 15.

CAN communication 
circuit wire between 
steering angle sensor 
and CAN circuit junction 
connector is open or 
high resistance. If wires 
are OK, check steering 
angle sensor power and 
ground circuits. If 
circuits are OK, 
substitute a known-
good steering angle 
sensor and recheck.

15 CAN communication circuit check

1) Disconnect connectors from all control modules (ECM, 

TCM (if equipped), BCM, ABS or ESP

® control module, 

4WD control module (if equipped), keyless start control 
module (if equipped), combination meter, steering to 
angle sensor (vehicle with ESP

®) with ignition switch 

turned OFF.

2) Check that CAN communication circuit is as follows.

• All wire harness resistance of CAN communication 

circuit is less than 1 

Ω between each control module.

• Insulation resistance between CAN communication 

circuit wires is infinity at each control module 
connector.

• Insulation resistance between each CAN 

communication circuit wire and vehicle body ground is 
infinity at each control module connector.

• Circuit voltage of CAN communication circuit is 0 V 

with ignition switch turned ON.

Are they in good condition?

Go to Step 16.

Repair or replace 
defective CAN 
communication circuit.

16 ABS warning lamp check

1) Connect connectors to all control modules 

communicating by CAN.

2) Turn ignition switch ON.

Is ABS warning lamp light up?

Substitute a known-
good ABS or ESP

® 

control module and 
recheck.

Substitute a known-
good ECM and recheck.

Step

Action

Yes

No

Engine General Information and Diagnosis: For Petrol Engine Model 1A-194

DTC P2101: Throttle Actuator Control Motor Circuit Range / Performance

S6JB0A1114068

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 using scan tool.
3) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check 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

1

2

BLK/RED

BLK/RED

BLU

E23-1  

E23-60  

C37-15  

C37-29  
C37-48  

BLK/ORN

C37-58  

BLU/ORN

GRN

BLU/RED

BLU/YEL

BLU/RED

E23-16  

E23-50  

E23-17  

C37-45  

C37-44  

1-1

1-2

1-3

3

4

5

8

6

7

10

9

E23-29  

BLK/YEL

BLK/WHT

WHT/GRN

C37-30  BLK/ORN

BLK/YEL
BLK/YEL
BLK/YEL

BLU/BLK

BLU/BLK

WHT

BLK

RED

GRN

C37-53  

C37-54  

C37-40  

C37-41  

I5JB0A110069-01

1. Electric throttle body assembly

3. ECM

8. “IGN” fuse

1-1. Throttle actuator

4. Main relay

9. “IG COIL” fuse

1-2. Throttle position sensor (main)

5. Fuse box No.2

10.  Ignition switch

1-3. Throttle position sensor (sub)

6. “THR MOT” fuse

2. Throttle actuator control relay

7. “FI” fuse

DTC detecting condition

Trouble area

Monitored voltage of throttle actuator output (duty output) 
is inconsistent with its control command.
(1 driving detection logic)

• Throttle actuator circuit
• Electric throttle body assembly
• ECM