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