Suzuki Grand Vitara JB627. Manual - part 50

1A-149 Engine General Information and Diagnosis: 

DTC P2102: Throttle Actuator Control Motor Circuit Low

S6JB0B1104059

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) Keep ignition switch is at ON position for 5 seconds or longer.
4) Check DTC by using scan tool.

BLU/BLK

BLU/BLK

BLU/BLK

BLK/RED

BLK/RED

BLK/RED

BLU

12V 5V

E23-8  

E23-16
E23-2 
E23-3 

WHT/GRN

C37-59

C37-58

C37-39

C37-73

C37-80

BLK/YEL

BLK/ORN

BLK/ORN

BLK/YEL
BLK/YEL

1

3 2

4

5

6

7

8

9

1110

12

13

14

15

16

17

18

19

20

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

33

34

35

36

37

38

39

40

32

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

E23

C37

BLK/ORN

C37-81

BLK/YEL

BLK/WHT

BLU/ORN

GRN

BLU/YEL

BLU/RED

BLU/BLK

E23-6 

E23-7 

E23-5 
E23-4 

C37-45

C37-46

C37-65

C37-64

BLU/RED

WHT

GRN

RED

BLK

8

11 10 9

13

12

7

5

2

1

4

3

6

C1

S1

S2

C2

I5JB0C110013-01

C1: Power supply circuit of throttle actuator control relay (coil side)

3: Throttle position sensor (main)

9: “THR MOT” fuse

C2: Control circuit of throttle actuator control relay (coil side)

4: Throttle position sensor (sub)

10: “FI” fuse

S1: Power supply circuit of throttle actuator control relay (switch side)

5: Throttle actuator control relay

11: “IGN” fuse

S2: Control circuit of throttle actuator control relay (switch side)

6: ECM

12: “IG COIL” fuse

1: Electric throttle body assembly

7: Main relay

13: Ignition switch

2: Throttle actuator

8: Fuse box No.2

DTC detecting condition

Trouble area

Power supply voltage of throttle actuator control circuit is lower 
than 6 V for more than 0.5 sec. even if throttle actuator control 
relay turned on.
(1 driving cycle detection logic)

• Throttle actuator control relay and its circuit
• ECM

Engine General Information and Diagnosis:  1A-150

DTC Troubleshooting

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

 

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

Throttle actuator control relay circuit check
1) Remove throttle actuator control relay with ignition 

switch turned OFF.

2) Check for proper terminal connection to throttle actuator 

control relay and ECM connectors.

3) If connections are OK, turn ignition switch to ON 

position.

4) Check that circuit voltage of throttle actuator control 

relay (coil side and switch side) power supply circuit is 
battery voltage.

Is it in good condition?

Go to Step 3.

Repair or replace power 
supply circuit of throttle 
actuator control relay 
(coil side and/or switch 
side).

3

Throttle actuator control relay check
1) Check throttle actuator control relay for operation 

referring to “Engine and Emission Control System Relay 
Inspection in Section 1C”.

Is it in good condition?

Go to Step 4.

Replace throttle 
actuator control relay.

4

Wire harness check
1) Disconnect connectors from ECM with ignition switch 

turned OFF.

2) Check that throttle actuator control relay (coil side and 

switch side) circuit is as follows.
• Wiring harness resistance of throttle actuator control 

relay (coil side and switch side) control circuit is less 
than 3

Ω

• Insulation resistance between throttle actuator control 

relay (coil side and switch side) control circuit and 
vehicle body ground is Infinity

• Insulation resistance of wire harness is infinity 

between throttle actuator control relay (coil side) 
terminal and each other terminal at throttle actuator 
control relay connector

• Circuit voltage of throttle actuator control relay (coil 

side and switch side) control circuit is 0 – 1 V with 
ignition switch turned ON

Are they in good condition?

Substitute a known 
good ECM and recheck.

Repair or replace 
control circuit of throttle 
actuator control relay 
(coil side and/or switch 
side) is open, short or 
high resistance.

1A-151 Engine General Information and Diagnosis: 

DTC P2103: Throttle Actuator Control Motor Circuit High

S6JB0B1104060

Wiring Diagram
Refer to “DTC P2101: Throttle Actuator Control Motor Circuit Range / Performance”.

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) Keep ignition switch is at ON position for 5 seconds or longer.
4) 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”.

 

DTC detecting condition

Trouble area

Power supply current of throttle actuator control circuit is higher 
than specification for more than 0.5 sec.
(1 driving cycle detection logic)

• Throttle actuator control circuit
• Electric throttle body assembly
• ECM

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

Throttle actuator circuit check
1) Disconnect connectors from electric throttle body 

assembly and ECM with ignition switch turned OFF.

2) Check for proper terminal connection to electric throttle 

body assembly and ECM connectors.

3) If connections are OK, check that throttle actuator motor 

circuit is as follows.
• Wiring harness resistance of each throttle actuator 

motor drive circuit (1 and 2) is less than 3 

Ω

• Insulation resistance between each throttle actuator 

motor drive circuit (1 and 2) and vehicle body ground 
is Infinity

• Insulation resistance of wire harness is infinity 

between throttle actuator motor drive terminal (1) and 
each other terminal at electric throttle body connector

• Circuit voltage of each throttle actuator motor drive 

circuit (1 and 2) is 0 – 1 V with ignition switch turned 
ON.

Are they in good condition?

Go to Step 3.

Repair or replace 
throttle actuator motor 
drive circuit(s).

1

2

I6JB01110058-01

Engine General Information and Diagnosis:  1A-152

DTC P2108: Throttle Actuator Control Module Performance

S6JB0B1104061

Wiring Diagram
Refer to “DTC P2102: Throttle Actuator Control Motor Circuit Low”.

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) Keep ignition switch is at ON position for 5 seconds or longer.
4) Check DTC by using scan tool.

DTC Troubleshooting
Refer to “DTC P2102: Throttle Actuator Control Motor Circuit Low”.

DTC P2119: Throttle Actuator Control Throttle Body Range / Performance

S6JB0B1104062

Wiring Diagram
Refer to “DTC P2101: Throttle Actuator Control Motor Circuit Range / Performance”.

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) Keep ignition switch is at ON position for 5 seconds or longer.
4) Check DTC by using scan tool.

3

Electric throttle body assembly check
1) Check electric throttle body for performance referring to 

“Electric Throttle Body Assembly On-Vehicle Inspection 
in Section 1C”.

Is it in good condition?

Substitute a known 
good ECM and recheck.

Repair or replace 
electric throttle body 
assembly.

Step

Action

Yes

No

DTC detecting condition

Trouble area

Throttle actuator power supply voltage is 3 V or less even though 
its control relay is turned OFF, or throttle actuator power supply 
voltage is 8.4 V or more even though the relay is turned ON.
(1 driving cycle detection logic)

• Throttle actuator control relay and its circuit
• ECM

DTC detecting condition

Trouble area

Even though throttle motor control is interrupted (throttle valve 
default position) at the time of detecting failure in electric throttle 
body, TP is 12 degrees or more, or MAF is 1400 g/min or more.
or
Even though throttle motor control is interrupted (throttle valve 
default position) at the time of IG OFF control, TP is 5 degrees or 
less, or 15 degrees or more.
(1 driving cycle detection logic)

• Electric throttle body assembly
• ECM