Suzuki Grand Vitara JB416 / JB420 / JB419. Service manual - part 43

1A-119 Engine General Information and Diagnosis: For Petrol Engine Model

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 Troubleshooting

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

Step

Action

Yes

Was “Engine and Emission Control System Check”
performed?

Go to Step 2.

Go to “Engine and
Emission Control
System Check: For
Petrol Engine Model”.

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

Go to applicable DTC
diag. flow.

Go to Step 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.

Fuel pressure check
1) Check fuel pressure referring to “Fuel Pressure Check:

For Petrol Engine Model”.

Is check result satisfactory?

Go to Step 5.

Repair or replace
defective part.

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

For Petrol Engine Model in Section 1G”.

Is check result satisfactory?

Go to Step 6.

Faulty injector(s) or its
circuit.

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.

Engine General Information and Diagnosis: For Petrol Engine Model 1A-120

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 Petrol Engine Model” for normal value.).

Is each value within specified range?

Go to Step 8.

Go to “DTC P0101:
Mass Air Flow Circuit
Range / Performance:
For Petrol Engine
Model”.

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: For Petrol Engine Model”.

Is check result satisfactory?

Go to Step 9.

Faulty ECT sensor or its
circuit.

Engine type check

Is engine type J20A?

Go to Step 10.

Go to Step 13.

10 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 12.

Go to Step 11.

11 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.

Step

Action

Yes

1A-121 Engine General Information and Diagnosis: For Petrol Engine Model

DTC P0222: Throttle Position Sensor (Sub) Circuit Low

S6JB0A1114037

Wiring Diagram

12 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: For Petrol Engine Model in Section 1C”.

Is check result satisfactory?

Go to Step 13.

Replace A/F sensor.

13 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):
For Petrol Engine Model”.

Is check result satisfactory?

Replace A/F sensor.

Repair or replace
defective circuit.

Step

Action

Yes

E23

C37

14
29

54 53

15
30

39 38

14
29

54 53

15
30

39 38

12V

BLU/BLK

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

E23-29

BLK/YEL

BLK/WHT

WHT/GRN

C37-30 BLK/ORN

BLK/YEL
BLK/YEL
BLK/YEL

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

Engine General Information and Diagnosis: For Petrol Engine Model 1A-122

DTC Detecting Condition and Trouble Area

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

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”.

DTC detecting condition

Trouble area

Output voltage of throttle position sensor (sub) is less than 0.3 V for
specified time continuously.
(1 driving detection logic)

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

Step

Action

Yes

Was “Engine and Emission Control System Check”
performed?

Go to Step 2.

Go to “Engine and
Emission Control
System Check: For
Petrol Engine Model”.

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

OFF.

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

displayed on scan tool when accelerator pedal is idle
position and fully depressed.

Is displayed 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.

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