Suzuki Grand Vitara JB627. Manual - part 20

1A-29 Engine General Information and Diagnosis: 

Engine Basic Check

S6JB0B1104003

This check is very important for troubleshooting when ECM has detected no DTC and no abnormality has been found 
in “Visual Inspection”.
Follow the flow carefully.

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

1) Check battery voltage.

Is it 11 V or more?

Go to Step 3.

Charge or replace 
battery.

3

Is vehicle equipped with keyless start control system?

Go to Step 4.

Go to Step 5.

4

Check keyless start control system malfunction
1) Check keyless start control system referring to “Keyless 

Start System Operation Inspection in Section 10E”.

Is check result satisfactory?

Go to Step 5.

Keyless start control 
system malfunction.

5

Is engine cranked?

Go to Step 6.

Go to “Cranking System 
Symptom Diagnosis in 
Section 1I”.

6

Does engine start?

Go to Step 7.

Go to Step 9.

7

1) Check engine idle speed referring to “Idle Speed and 

IAC Throttle Valve Opening Inspection”.

Is check result as specified?

Go to Step 8.

Go to “Engine Symptom 
Diagnosis”.

8

1) Check ignition timing referring to “Ignition Timing 

Inspection in Section 1H”.

Is check result as specified?

Go to “Engine Symptom 
Diagnosis”.

Check ignition control 
related parts referring to 
“Ignition Timing 
Inspection in Section 
1H”.).

9

Check immobilizer system malfunction
1) Check immobilizer control system referring to 

“Immobilizer Control System Check in Section 10C”.

Is it in good condition?

Go to Step 10.

Immobilizer control 
system malfunction.

10 Check fuel supply

1) Check to make sure that enough fuel is filled in fuel tank.
2) Turn ON ignition switch for 3 seconds and then OFF. 
3) Repeat Step 2) a few times.

Is fuel return pressure (returning sounds) felt from fuel return 
hose when ignition switch is turned ON?

Go to Step 12.

Go to Step 11.

11 Check fuel pump for operation

Was fuel pump operating sound heard from fuel filler for 
about 3 seconds after ignition switch ON and stop?

Go to “Fuel Pressure 
Check”.

Go to “Fuel Pump and 
Its Circuit Check”.

12 Check ignition spark

1) Check ignition spark referring to “Ignition Spark Check in 

Section 1H”.

Is it in good condition?

Go to Step 13.

Go to “Ignition System 
Symptom Diagnosis in 
Section 1H”.

13 Check fuel injector for operation

1) Check fuel injector referring to “Fuel Injector Circuit 

Check”.

Is it in good condition?

Go to “Engine Symptom 
Diagnosis”.

Go to “Fuel Injector 
Circuit Check”.

Engine General Information and Diagnosis:  1A-30

Malfunction Indicator Lamp (MIL) Check

S6JB0B1104004

1) Turn ON ignition switch (but the engine at stop) and check that MIL lights.

If MIL does not light up (or MIL dims) but engine can be started, go to “Malfunction Indicator Lamp Does Not Come 
ON with Ignition Switch ON and Engine Stop (but Engine Can Be Started)” for troubleshooting.
If MIL does not light with ignition switch ON and engine does not start though it is cranked up, go to “ECM Power 
and Ground Circuit Check”.

2) Start engine and check that MIL turns OFF.

If MIL remains ON, and no DTC is stored in ECM, go to “Malfunction Indicator Lamp Remains ON after Engine 
Starts” for troubleshooting.

DTC Table

S6JB0B1104005

DTC No.

Detected item

Detecting condition 

(DTC will set when detecting:)

DTC

MIL

)

 P0031

HO2S Heater Control Circuit Low 
(Bank 1 Sensor 1)

Circuit current of A/F sensor (bank-1) 
heater is lower than 0.8 A for more than 4 
sec continuously while control duty ratio of 
A/F sensor heater is more than 22% with 
engine running.

2 driving 

cycles

2 driving 

cycles

)

 P0032

HO2S Heater Control Circuit 
High (Bank 1 Sensor 1)

Circuit current of A/F sensor (bank-1) 
heater is higher than 10.5 A on duty pulse 
or 0.8 A on OFF duty pulse for more than 4 
sec continuously while control duty ratio of 
A/F sensor heater is more than 22% with 
engine running.

2 driving 

cycles

2 driving 

cycles

)

 P0037

HO2S Heater Control Circuit Low 
(Bank 1 Sensor 2)

Circuit current of HO2S (bank-1) heater is 
lower than specification (0.16 – 0.28 A 
depending on battery voltage) for more 
than 1 sec continuously while control duty 
of HO2S sensor heater is ON with engine 
running.

2 driving 

cycles

2 driving 

cycles

)

 P0038

HO2S Heater Control Circuit 
High (Bank 1 Sensor 2)

Circuit current of HO2S sensor (bank-1) 
heater is higher than 5 A at ON duty pulse 
or 0.2 A at OFF duty pulse for more than 1 
sec continuously while control duty of 
HO2S sensor heater is ON with engine 
running.

2 driving 

cycles

2 driving 

cycles

)

 P0051

HO2S Heater Control Circuit Low 
(Bank 2 Sensor 1)

Circuit current of A/F sensor (bank-2) 
heater is lower than 0.8 A for more than 4 
sec continuously while control duty ratio of 
A/F sensor heater is more than 22% with 
engine running.

2 driving 

cycles

2 driving 

cycles

1

I5JB0A110018-01

1A-31 Engine General Information and Diagnosis: 

)

 P0052

HO2S Heater Control Circuit 
High (Bank 2 Sensor 1)

Circuit current of A/F sensor (bank-2) 
heater is higher than 10.5 A at ON duty 
pulse or 0.8 A at OFF duty pulse for more 
than 4 sec continuously while control duty 
ratio of A/F sensor heater is more than 
22% with engine running.

2 driving 

cycles

2 driving 

cycles

)

 P0057

HO2S Heater Control Circuit Low 
(Bank 2 Sensor 2)

Circuit current of HO2S (bank-2) heater is 
lower than specification (0.16 – 0.28 A 
depending on battery voltage) for more 
than 1 sec continuously while control duty 
of HO2S sensor heater is ON with engine 
running.

2 driving 

cycles

2 driving 

cycles

)

 P0058

HO2S Heater Control Circuit 
High (Bank 2 Sensor 2)

Circuit current of HO2S sensor (bank-2) 
heater is higher than 5 A at ON duty pulse 
or 0.2 A at OFF duty pulse for more than 1 
sec continuously while control duty of 
HO2S sensor heater is ON with engine 
running.

2 driving 

cycles

2 driving 

cycles

)

 P0101

Mass Air Flow Circuit Range/
Performance

Ratio of MAF sensor signal to estimated 
MAF based on engine speed and MAP 
signal is more than 1.3 or less than 0.8 for 
more than 10 sec.

2 driving 

cycles

2 driving 

cycles

)

 P0102 Mass Air Flow Circuit Low Input

Output voltage of MAF sensor is less than 
0.3 V.

1 driving 

cycle

1 driving 

cycle

)

 P0103 Mass Air Flow Circuit High Input

Output voltage of MAF sensor is more 
than 5 V.

1 driving 

cycle

1 driving 

cycle

)

 P0107

Manifold Absolute Pressure 
Circuit Low Input

Output voltage of MAP sensor is less than 
0.1 V.

1 driving 

cycle

1 driving 

cycle

)

 P0108

Manifold Absolute Pressure 
Circuit High Input

Output voltage of MAP sensor is more 
than 4.9 V.

1 driving 

cycle

1 driving 

cycle

)

 P0111

Intake Air Temperature Sensor 
Circuit Performance

Variation of IAT sensor signal is less than 
15 mV even through ECT reaches 75 

°C 

after engine is started with ECT less than 
30 

°C.

2 driving 

cycles

2 driving 

cycles

)

 P0112

Intake Air Temperature Sensor 
Circuit Low

Circuit voltage of IAT sensor is less than 
0.16 V.

1 driving 

cycle

1 driving 

cycle

)

 P0113

Intake Air Temperature Sensor 
Circuit High

Circuit voltage of IAT sensor is more than 
5.0 V.

1 driving 

cycle

1 driving 

cycle

)

 P0116

Engine Coolant Temperature 
Circuit Range / Performance

Variation of ECT sensor input voltage is 15 
mV or less even though vehicle has been 
driven for 10 min or more after starting 
engine. 

2 driving 

cycles

2 driving 

cycles

)

 P0117

Engine Coolant Temperature 
Circuit Low

Circuit voltage of ECT sensor is less than 
0.16 V.

1 driving 

cycle

1 driving 

cycle

)

 P0118

Engine Coolant Temperature 
Circuit High

Circuit voltage of ECT sensor is more than 
5.0 V.

1 driving 

cycle

1 driving 

cycle

)

 P0122

Throttle Position Sensor (Main) 
Circuit Low

Output voltage of throttle position sensor 
(main) is lower than 0.3 V.

1 driving 

cycle

1 driving 

cycle

)

 P0123

Throttle Position Sensor (Main) 
Circuit High

Output voltage of throttle position sensor 
(main) is higher than 4.5 V.

1 driving 

cycle

1 driving 

cycle

)

 P0133

O2 Sensor Circuit Slow 
Response (Bank 1 Sensor 1)

Number of shifting times for A/F sensor 
signal between rich and lean is less than 
13 times in 20 sec while A/F (fuel trim) is 
shifted from rich to lean and lean to rich 
with specified diagnosis frequency under 
specified running.

2 driving 

cycles

2 driving 

cycles

DTC No.

Detected item

Detecting condition 

(DTC will set when detecting:)

DTC

MIL

Engine General Information and Diagnosis:  1A-32

)

 P0134

O2 Sensor Circuit No Activity 
Detected (Bank 1 Sensor 1)

Impedance of A/F sensor element is 
higher than 67 

Ω for more than 20 sec 

even though A/F sensor heater is turned 
ON for more than specified time with 
engine running.

2 driving 

cycles

2 driving 

cycles

)

 P0137

O2 Sensor Circuit Low Voltage 
(Bank 1 Sensor 2)

Circuit voltage of HO2S (bank-1) is lower 
than 15 mV for more than 60 sec 
continuously with engine running except in 
fuel cut condition.

2 driving 

cycles

2 driving 

cycles

)

 P0138

O2 Sensor Circuit High Voltage 
(Bank 1 Sensor 2)

Circuit voltage of HO2S (bank-1) is higher 
than 1.2 V for more than 20 sec 
continuously with engine running.

2 driving 

cycles

2 driving 

cycles

)

 P0140

O2 Sensor Circuit No Activity 
Detected (Bank 1 Sensor 2)

Circuit voltage of HO2S (bank-1) is within 
0.27 V – 0.35 V for more than 120 sec 
continuously while A/F (fuel trim) is shifted 
from rich to lean and lean to rich with 
specified diagnosis frequency under 
specified running, or circuit voltage of 
HO2S (bank-1) is out of specified range 
(0.2 V – 0.45 V) during engine being 
started from cold (ECT less than 40 

°C), 

then warmed up and run. 

2 driving 

cycles

2 driving 

cycles

 ) P0153

O2 Sensor Circuit Slow 
Response (Bank 2 Sensor 1)

Number of shifting times for A/F sensor 
signal between rich and lean is less than 
13 times in 20 sec while A/F (fuel trim) is 
shifted from rich to lean and lean to rich 
with specified diagnosis frequency under 
specified running.

2 driving 

cycles

2 driving 

cycles

 ) P0154

O2 Sensor Circuit No Activity 
Detected (Bank 2 Sensor 1)

Impedance of A/F sensor element is 
higher than 67 

Ω for more than 20 sec 

even though A/F sensor heater is turned 
ON for more than specified time with 
engine running.

2 driving 

cycles

2 driving 

cycles

)

 P0157

O2 Sensor Circuit Low Voltage 
(Bank 2 Sensor 2)

Circuit voltage of HO2S (bank-1) is lower 
than 15 mV for more than 60 sec 
continuously with engine running except in 
fuel cut condition.

2 driving 

cycles

2 driving 

cycles

 ) P0158

O2 Sensor Circuit High Voltage 
(Bank 2 Sensor 2)

Circuit voltage of HO2S (bank-1) is higher 
than 1.2 V for more than 20 sec 
continuously with engine running.

2 driving 

cycles

2 driving 

cycles

)

 P0160

O2 Sensor Circuit No Activity 
Detected (Bank 2 Sensor 2)

Circuit voltage of HO2S (bank-2) is within 
0.27 V – 0.35 V for more than 120 sec 
continuously while A/F (fuel trim) is shifted 
from rich to lean and lean to rich with 
specified diagnosis frequency under 
specified running, or circuit voltage of 
HO2S (bank-2) is out of specified range 
(0.2 V – 0.45 V) during engine being 
started from cold (ECT less than 40 

°C), 

then warmed up and run. 

2 driving 

cycles

2 driving 

cycles

)

 P0171 System Too Lean (Bank 1)

Total fuel trim (short term + long term fuel 
trim) is larger than 127% for more than 20 
sec, or short term fuel trim is larger than 
130% for more than 30 sec.

2 driving 

cycles

2 driving 

cycles

)

 P0172 System Too Rich (Bank 1)

Total fuel trim (short term + long term fuel 
trim) is smaller than 71% for more than 20 
sec, or short term fuel trim is smaller than 
70% for more than 30 sec.

2 driving 

cycles

2 driving 

cycles

DTC No.

Detected item

Detecting condition 

(DTC will set when detecting:)

DTC

MIL