Suzuki Grand Vitara JB416 / JB420. Manual - part 41

1A-113 Engine General Information and Diagnosis: 

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

WARNING

!

 

• When performing a road test, select a place where there is no traffic or possibility of a traffic 

accident and be very careful during testing to avoid occurrence of an accident.

• Road test should be carried out by 2 persons, a driver and a tester, on a level road.

 

NOTE
Check to make sure that following conditions are satisfied when using this “DTC Confirmation 
Procedure”.
• Intake air temperature at engine start: –10 

°C (14 °F) to 80 °C (176 °F)

• Intake air temperature: –10 

°C (14 °F) to 70 °C (158 °F)

• Engine coolant temperature: 70 

°C (158 °F) to 150 °C (302 °F)

• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)

 

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and print Freeze Frame Data or write them down using scan tool.
3) Clear DTC using scan tool.
4) Start engine and warm up to normal operating temperature.
5) Operate vehicle with condition as noted freeze frame data for 5 min.
6) Stop vehicle and check DTC and pending DTC.

DTC detecting condition

Trouble area

DTC P0171:
Total fuel trim (short term fuel trim + long term fuel trim) is higher 
than specified range for 30 to 90 sec (depending on ECT) 
continuously.
(2 driving cycle detection logic)
DTC P0172:
Total fuel trim (short term fuel trim + long term fuel trim) is lower 
than specified range for 30 to 90 sec (depending on ECT) 
continuously.
(2 driving cycle detection logic)
DTC P2195:
A/F sensor output is lower than specification while vehicle is 
running constant speed and constant engine load after warmed 
up.
(2 driving cycle detection logic)
DTC P2196:
A/F sensor output is higher than specification while vehicle is 
running constant speed and constant engine load after warmed 
up.
(2 driving cycle detection logic)

• Vacuum leakage
• Exhaust gas leakage
• Fuel pressure out of specification
• Fuel injector malfunction
• A/F sensor malfunction
• MAF sensor malfunction
• ECT sensor malfunction

Engine General Information and Diagnosis:  1A-114

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

Is there DTC(s) other than fuel system (DTC P0171 / P0172 
/ 2195 / 2196)?

Go to applicable DTC 
diag. flow.

Go to Step 3.

3

Intake system and exhaust system for leakage check

Are intake system and exhaust system in good condition?

Go to Step 4.

Repair or replace 
defective part.

4

Fuel pressure check
1) Check fuel pressure referring to “Fuel Pressure Check”.

Is check result satisfactory?

Go to Step 5.

Repair or replace 
defective part.

5

Fuel injectors and its circuit check
1) Check fuel injectors referring to “Fuel Injector Inspection 

in Section 1G”.

Is check result satisfactory?

Go to Step 6.

Faulty injector(s) or its 
circuit.

6

Visual inspection
1) Check MAF sensor and air intake system.

• Objects which block measuring duct and resistor of 

MAF sensor.

• Other air flow which does not pass MAF sensor.

Are they in good condition?

Go to Step 7.

Repair or replace 
defective part.

7

MAF sensor for performance check
1) With ignition switch turned OFF, connect scan tool to 

DLC.

2) Start engine and warm up to normal operating 

temperature.

3) Check MAF value using scan tool (Refer to “Scan Tool 

Data” for normal value.).

Is each value within specified range?

Go to Step 8.

Go to “DTC P0101: 
Mass Air Flow Circuit 
Range / Performance”.

8

ECT sensor for performance check
1) Check ECT sensor performance referring to Step 2 to 4 

and 11 of “DTC P0116: Engine Coolant Temperature 
Circuit Range / Performance”.

Is check result satisfactory?

Go to Step 9.

Faulty ECT sensor or its 
circuit.

1A-115 Engine General Information and Diagnosis: 

9

A/F sensor adjusting resistor power /ground circuit 
check
1) Disconnect connector from A/F sensor with ignition 

switch turned OFF.

2) Check for proper connection to A/F sensor connector.
3) If connections are OK, check A/F sensor adjusting 

resistor circuit for the following.
• ECM 5 V power is applied to A/F sensor adjusting 

resistor circuit at A/F sensor connector (power circuit 
check)

• Resistance between ground to ECM for A/F sensor 

adjusting resistor circuit and vehicle body ground is 
less than 1 

Ω at A/F sensor connector (ground circuit 

check)

Is it in good condition?

Go to step 11.

Go to Step 10.

10 A/F sensor adjusting resistor circuit check

1) Disconnect connector from ECM with ignition switch 

turned OFF.

2) Check for proper connection of each A/F sensor circuit 

terminal to ECM connector.

3) If connections are OK, check A/F sensor adjusting 

resistor circuit for the following.
• Resistance of each A/F sensor adjusting resistor 

circuit wire between A/F sensor connector and ECM 
connector is less than 3 

Ω (continuity check)

• Resistance between A/F sensor adjusting resistor 

circuit wires are infinity (no continuity check)

• Resistance between each A/F sensor adjusting 

resistor circuit wire and vehicle body ground is infinity 
(ground short check)

• Voltage between each A/F sensor adjusting resistor 

circuit wire and vehicle body ground is 0 V with 
ignition switch tuned ON (power short check)

Is it in good condition?

Substitute a known 
good ECM and recheck.

Repair or replace 
defective circuit.

11 A/F sensor adjusting resistor check

1) 1)Check for resistance of A/F sensor adjusting resistor 

referring to “Air Fuel Ratio (A/F) Sensor On-Vehicle 
Inspection in Section 1C”.

Is check result satisfactory?

Go to Step 12.

Replace A/F sensor.

12 A/F sensor for performance check

1) Check A/F sensor referring to Step 3 and 4 of “DTC 

P0131 / P0132 / P0134: O2 Sensor (HO2S) Circuit Low 
Voltage / High Voltage / No Activity Detected (Sensor-
1)”.

Is check result satisfactory?

Replace A/F sensor.

Repair or replace 
defective circuit.

Step

Action

Yes

No

Engine General Information and Diagnosis:  1A-116

DTC P0222: Throttle Position Sensor (Sub) Circuit Low

S5JB0A1104075

Wiring Diagram

DTC Detecting Condition and Trouble Area

NOTE
When DTC P0122 and P0222 are indicated together, it is possible that “WHT” wire open circuit.

 

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  

I5JB0A110041-01

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

Output voltage of throttle position sensor (sub) is less than specified value 
for specified time continuously.
(1 driving detection logic)

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