Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 66

1A-211 Engine General Information and Diagnosis: For Petrol Engine Model

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.

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.

Step

Action

Yes

No

“BLU/GRN”

“BLU/YEL”

“ORN”

“WHT/BLU”

“WHT”

“ORN BLU”

I5JB0A110071-01

Engine General Information and Diagnosis: For Petrol Engine Model 1A-212

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

S6JB0A1114077

Wiring Diagram

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: For Petrol Engine Model 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

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

1A-213 Engine General Information and Diagnosis: For Petrol Engine Model

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: For Petrol Engine Model”.

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

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: For
Petrol Engine Model”.

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: For Petrol Engine Model”?

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

Go to Step 3.

Engine General Information and Diagnosis: For Petrol Engine Model 1A-214

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.

5

Wire harness check
1) Measure voltage between “C37-53” terminal of ECM

connector and engine ground with ignition switch turned
ON.

Is voltage 0 V?

Substitute a known-
good ECM and recheck.

“WHT” wire is shorted to
other circuit.

6

Wire harness check
1) Measure voltage between “BLK” wire terminal of electric

throttle body assembly connector and engine ground,
between “RED” wire terminal of electric throttle body
assembly connector and engine ground with ignition
switch turned ON.

Is each voltage 4 – 6 V?

Go to Step 9.

Go to Step 7.

Step

Action

Yes

No

"BLK"

"WHT"

"RED"

"GRN"

"BLU/YEL"

"BLU/RED"

I5JB0A110042-01

"BLU/RED"

"BLU/YEL"

"GRN"

"RED"

"WHT"

"BLK"

I5JB0A110043-01