Suzuki Grand Vitara JB416 / JB420. Manual - part 62

1A-197 Engine General Information and Diagnosis: 

DTC P2122: Pedal Position Sensor (Main) Circuit Low Input

S5JB0A1104082

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

E23-56

E23-55

E23-54

E23-53

E23-52

E23-51

5 V

5 V

WHT

WHT/BLU

ORN

ORN/BLU

BLU/GRN

BLU/YEL

1

1-1

3

2

1-2

I5JB0A110070-01

1. Accelerator pedal position (APP) sensor 

assembly

1-2. Accelerator pedal position (APP) sensor (sub)

3. Ground of accelerator pedal position (APP) 

sensor for shield wire

1-1. Accelerator pedal position (APP) sensor 

(main)

2. ECM

DTC detecting condition

Trouble area

Output voltage of accelerator pedal position sensor (main) 
is less than specified value for 0.5 seconds continuously.
(1 driving detection logic)

• Accelerator pedal position (APP) sensor (main) circuit
• Accelerator pedal position (APP) sensor assembly
• ECM
• Incorrect mounting of accelerator pedal position (APP) 

sensor assembly

Engine General Information and Diagnosis:  1A-198

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 (main) and its circuit 
check
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Turn ON ignition switch, check  “APP Sensor 1 Volt” 

displayed on scan tool.

Is displayed voltage below 0.1 V?

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 “WHT”, “WHT/BLU” 
and “ORN” wire terminals.

3) If OK, measure voltage between “WHT” 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 7.

Go to Step 5.

5

ECM voltage check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors 

connected.

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

56” terminal.

4) If OK, measure voltage between “E23-56” terminal of 

ECM connector and engine ground with ignition switch 
turned ON.

Is voltage 4 – 6 V?

“WHT” wire is open or 
high resistance circuit.

Go to Step 6.

“BLU/GRN”

“BLU/YEL”

“ORN”

“WHT/BLU”

“WHT”

“ORN BLU”

I5JB0A110071-01

1A-199 Engine General Information and Diagnosis: 

6

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

turned OFF.

2) Measure resistance between “E23-56” terminal of ECM 

connector and engine ground.

Is resistance infinity?

Substitute a known-
good ECM and recheck.

“WHT” wire is shorted to 
ground circuit.

7

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

turned OFF.

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

55”, “E23-54” and “E23-51” terminals.

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

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

Is resistance infinity?

Go to Step 8.

“WHT/BLU” wire is 
shorted to ground 
circuit.

8

Wire harness check
1) Measure resistance between “E23-55” and each “E23-

54”, “E23-51” terminals of ECM connector with ignition 
switch turned OFF.

Is each resistance infinity?

Go to Step 9.

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

9

Wire harness check
1) Measure resistance between “WHT/BLU” wire terminal 

of accelerator pedal position (APP) sensor assembly 
connector and “E23-55” terminal of ECM connector with 
ignition switch turned OFF.

Is resistance below 5 

Ω

?

Go to Step 10.

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

10 Accelerator pedal position (APP) sensor assembly 

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

to “Accelerator Pedal Position (APP) Sensor Assembly 
Removal and Installation 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

Engine General Information and Diagnosis:  1A-200

DTC P2123: Pedal Position Sensor (Main) Circuit High Input

S5JB0A1104083

Wiring Diagram
Refer to “DTC P2122: Pedal Position Sensor (Main) Circuit Low Input”.

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.

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

Output voltage of accelerator pedal position sensor (main) 
is more than specified value for 0.5 seconds continuously.
(1 driving detection logic)

• Accelerator pedal position (APP) sensor (main) circuit
• Accelerator pedal position (APP) sensor assembly
• ECM
• Incorrect mounting of accelerator pedal position (APP) 

sensor assembly

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 (main) and its circuit 
check
1) Connect scan tool to DLC with ignition switch turned 

OFF.

2) Turn ON ignition switch, check “APP Sensor 1 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”.