Suzuki Grand Vitara JB416 / JB420. Manual - part 64

1A-205 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 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.

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

Accelerator pedal position (APP) sensor assembly 
mounting check
1) Check that accelerator pedal position (APP) sensor 

assembly has been mounted to vehicle body properly 
(no pinched floor carpet, etc).

Is it OK?

Go to Step 3.

Reinstall accelerator 
pedal position (APP) 
sensor assembly 
properly referring to 
“Accelerator Pedal 
Position (APP) Sensor 
Assembly Removal and 
Installation in Section 
1C”.

3

Accelerator pedal position sensor (sub) and its circuit 
check
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Turn ON ignition switch, check “APP Sensor 2 Volt” 

displayed on scan tool.

Is displayed voltage 4.8 V or more?

Go to Step 4.

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

4

ECM voltage check
1) Disconnect connector from accelerator pedal position 

(APP) sensor assembly with ignition switch turned OFF.

2) Check for proper connection to accelerator pedal 

position (APP) sensor assembly at “ORN/BLU”, “BLU/
GRN” and “BLU/YEL” wire terminals.

3) If OK, measure voltage between “ORN/BLU” wire 

terminal of accelerator pedal position (APP) sensor 
assembly connector and vehicle body ground with 
ignition switch turned ON.

Is voltage 4 – 6 V?

Go to Step 6.

Go to Step 5.

“BLU/GRN”

“BLU/YEL”

“ORN”

“WHT/BLU”

“WHT”

“ORN BLU”

I5JB0A110071-01

Engine General Information and Diagnosis:  1A-206

5

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

turned OFF.

2) Check for proper connection of ECM connector at “E23-

53” terminal.

3) If OK, measure voltage between “E23-53” terminal of 

ECM connector and engine ground with ignition switch 
turned ON.

Is voltage 0 V?

Substitute a known-
good ECM and recheck.

“ORN/BLU” wire is 
shorted to power circuit.

6

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

turned OFF.

2) Check for proper connection of ECM connector at “E23-

56”, “E23-53” and “E23-52” terminals.

3) If OK, measure resistance between “BLU/GRN” wire 

terminal and each “WHT”, “ORN/BLU” wire terminals of 
accelerator pedal position (APP) sensor assembly 
connector.

Is each resistance infinity?

Go to Step 7.

“BLU/GRN” wire is 
shorted to “WHT” wire 
and/or “ORN/BLU” wire.

7

Wire harness check
1) Turn ON ignition switch.
2) Measure voltage between “E23-52” terminal of ECM 

connector and engine ground.

Is voltage 0 V?

Go to Step 8.

“BLU/GRN” wire is 
shorted to power circuit.

8

Ground circuit check
1) Connect connectors to ECM with ignition switch turned 

OFF.

2) Measure resistance between “BLU/YEL” wire terminal of 

accelerator pedal position (APP) sensor assembly 
connector and vehicle body ground.

Is resistance below 3 

Ω

?

Go to Step 10.

Go to Step 9.

9

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

connected.

2) Check for proper connection of ECM connector at “E23-

51” terminal.

3) If OK, measure resistance between “E23-51” terminal of 

ECM connector and engine ground.

Is resistance below 3 

Ω

?

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

Faulty ECM ground 
circuit. If circuit is OK, 
substitute a known-
good ECM and recheck.

10 Accelerator pedal position (APP) sensor assembly 

check
1) Check accelerator pedal position sensor (sub) referring 

to “Accelerator Pedal Position (APP) Sensor Assembly 
Inspection in Section 1C”.

Is output voltage within specified value?

Substitute a known-
good ECM and recheck.

Replace accelerator 
pedal position (APP) 
sensor assembly.

Step

Action

Yes

No

1A-207 Engine General Information and Diagnosis: 

DTC P2135: Throttle Position Sensor (Main / Sub) Voltage Correlation

S5JB0A1104086

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  

I5JB0A110072-01

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

Difference between the opening angle based on throttle 
position sensor (main) and the opening angle based on 
throttle position sensor (sub) is more than specification for 
specified time continuously.
(1 driving detection logic)

• Throttle position sensor (main) and (sub) circuit
• Electric throttle body assembly
• ECM

Engine General Information and Diagnosis:  1A-208

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 position sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Turn ON ignition switch, check each voltage of “TP 

Sensor 1 Volt” and “TP Sensor 2 Volt” displayed on scan 
tool when accelerator pedal is idle position and fully 
depressed.

Is displayed each TP sensor value as described voltage in 
“Scan Tool Data”?

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

Go to Step 3.

3

ECM voltage check
1) Disconnect connector from electric throttle body 

assembly with ignition switch turned OFF.

2) Check for proper connection to electric throttle body 

assembly at “RED”, “GRN”, “WHT” and “BLK” wire 
terminals.

For J20 engine

For M16 engine

3) If OK, measure voltage between “WHT” wire terminal of 

electric throttle body assembly connector and engine 
ground with ignition switch turned ON.

Is voltage 4 – 6 V?

Go to Step 6.

Go to Step 4.

4

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

turned OFF.

2) Measure resistance between “C37-53” terminal of ECM 

connector and engine ground.

Is resistance infinity?

Go to Step 5.

“WHT” wire is shorted to 
other circuit.

"BLK"

"WHT"

"RED"

"GRN"

"BLU/YEL"

"BLU/RED"

I5JB0A110042-01

"BLU/RED"

"BLU/YEL"

"GRN"

"RED"

"WHT"

"BLK"

I5JB0A110043-01