Suzuki Grand Vitara JB627. Service manual — part 24

1A-45 Engine General Information and Diagnosis:

*

)

FUEL SYSTEM B1

(FUEL SYSTEM STATUS
BANK-1)

At specified idle speed after warming up

CLSD (closed loop)

*

)

FUEL SYSTEM B2

(FUEL SYSTEM STATUS
BANK-2)

At specified idle speed after warming up

CLSD (closed loop)

)

O2S B1 S2

(HEATED OXYGEN SENSOR
BANK-1 SENSOR-2)

At 2000 r/min. for 3 min. or longer after warming up

0.1 – 0.95 V

)

O2S B2 S2

(HEATED OXYGEN SENSOR
BANK-2 SENSOR-2)

At 2000 r/min. for 3 min. or longer after warming up

0.1 – 0.95 V

*

)

SHORT FT B1

(SHORT TERM FUEL TRIM
BANK-1)

At specified idle speed after warming up

–15 – +15%

*

)

LONG FT B1

(LONG TERM FUEL TRIM
BANK-1)

At specified idle speed after warming up

–15 – +15%

*

)

SHORT FT B2

(SHORT TERM FUEL TRIM
BANK-2)

At specified idle speed after warming up

–15 – +15%

*

)

LONG FT B2

(LONG TERM FUEL TRIM
BANK-2)

At specified idle speed after warming up

–15 – +15%

)

TOTAL FUEL TRIM B1

At specified idle speed after warming up

–30 – +30%

)

TOTAL FUEL TRIM B2

At specified idle speed after warming up

–30 – +30%

*

)

A/F B1 S1 CURRENT

(A/F SENSOR OUTPUT
CURRENT)

At specified idle speed after warming up

–0.17 – +0.10 mA

*

)

A/F B2 S1 CURRENT

(A/F SENSOR OUTPUT
CURRENT)

At specified idle speed after warming up

–0.17 – +0.10 mA

)

FUEL CUT

Engine at fuel cut condition

ON

Engine at other than fuel cut condition

OFF

)

O2S B1 S2 ACT

(HEATED OXYGEN SENSOR
BANK-1 SENSR-2)

At specified idle speed after warming up

ACTIVE

)

O2S B2 S2 ACT

(HEATED OXYGEN SENSOR
BANK-2 SENSOR-2)

At specified idle speed after warming up

ACTIVE

)

A/F B1 S1 ACT

(A/F SENSOR BANK-1
SENSOR-1)

At specified idle speed after warming up

ACTIVE

)

A/F B2 S1 ACT

(A/F SENSOR BANK-2
SENSOR-1)

At specified idle speed after warming up

ACTIVE

)

CANIST PRG DUTY

(EVAP CANISTER PURGE
FLOW DUTY)

At specified idle speed after warming up

0%

*

)

IGNITION ADVANCE

(IGNITION TIMING ADVANCE
FOR NO.1 CYLINDER)

At specified idle speed with no load after warming
up

10 – 16

° BTDC

)

EGR VALVE OPENING

At specified idle speed after warming up

0%

)

FUEL PUMP

Within 2 seconds after ignition switch ON or engine
running

ON

Engine at stop with ignition switch ON

OFF

)

STARTER SW

Ignition switch is turned to ST (engine cranking)
position

ON

Scan tool data

Vehicle condition

Normal condition /

reference values

Engine General Information and Diagnosis: 1A-46

)

A/C PRESSURE

(A/C REFRIGERANT
ABSOLUTE PRESSURE)

Engine running

A/C ON (A/C is operating) at
ambient temperature: 30

°C

(86

°F) and humidity: 50%

1300 – 1480 kPa For more
details, refer to pressure of
high pressure gauge under

“A/C System Performance

Inspection in Section 7B”.

A/C OFF (A/C is not
operating) at ambient
temperature: 30

°C (86 °F)

and engine coolant
temperature: 90 – 100

°C

(194 – 212

°F)

600 – 1000 kPa After longer
than 10 min from A/C switch

turned off

)

A/C SWITCH

Engine running after warming up, A/C not operating

OFF

Engine running after warming up, A/C operating

ON

)

A/C COMP RELAY

Engine running

A/C switch and blower motor
switch turned ON

ON

A/C switch and blower motor
switch turned OFF

OFF

)

BLOWER FAN

Ignition switch ON

Blower fan switch: 5th speed
position or more

ON

Blower fan switch: under 4th
speed position

OFF

)

ELECTRIC LOAD

Ignition switch ON / Headlight, small light, all turned
OFF

OFF

Ignition switch ON / Headlight, small light, turned
ON

ON

)

PSP SWITCH

(POWER STEERING PUMP
PRESSURE SWITCH)

At specified idle speed and steering wheel at
straight ahead position

OFF

At specified idle speed and steering wheel turned to
the right or left as far as it stops

ON

)

PNP SIGNAL

(TRANSMISSION RANGR
SENSOR) A/T only

Ignition switch ON / Selector lever in “P” or “N”
position

P/N Range

Ignition switch ON / Selector lever in “R”, “D”, “4”, “3”
or “L” position

D Range

)

RADIATOR FAN LOW

(RADIATOR COOLING FAN
CONTROL RELAY No.1)

Ignition switch ON

Engine coolant temp.: Lower
than 95

°C (203 °F)

OFF

Engine coolant temp.: 97.5

°C (208 °F) or higher

ON

)

RADIATOR FAN NO.1 HIGH

(RADIATOR COOLING FAN
CONTROL RELAY NO.2)

Ignition switch ON

Engine coolant temp.: lower
than 100

°C (212 °F)

OFF

Engine coolant temp.: 102.5

°C (212 °F) or higher

ON

)

RADIATOR FAN NO.2 HIGH

(RADIATOR COOLING FAN
CONTROL RELAY NO.3)

Ignition switch ON

Engine coolant temp.: lower
than 100

°C (212 °F)

OFF

Engine coolant temp.: 102.5

°C (212 °F) or higher

ON

)

TP SENSOR 1 VOLT

(THROTTLE POSITION
SENSOR (MAIN) OUTPUT
VOLTAGE)

Ignition switch ON
after warmed up
engine

Accelerator pedal released

0.5 – 1.5 V

Accelerator pedal depressed
fully

3.5 – 4.5 V

)

TP SENSOR 2 VOLT

(THROTTLE POSITION
SENSOR (SUB) OUTPUT
VOLTAGE)

Ignition switch ON
after warmed up
engine

Accelerator pedal released

3.5 – 4.5 V

Accelerator pedal depressed
fully

0.5 – 1.5 V

)

APP SENSOR 1 VOLT

(ACCELERATOR PEDAL
POSITION (APP) SENSOR
(MAIN) OUTPUT VOLTAGE)

Ignition switch ON
after warmed up
engine

Accelerator pedal released

0.6 – 0.9 V

Accelerator pedal depressed
fully

3.5 – 4.4 V

Scan tool data

Vehicle condition

Normal condition /

reference values

1A-47 Engine General Information and Diagnosis:

)

APP SENSOR 2 VOLT

(ACCELERATOR PEDAL
POSITION (APP) SENSOR
(SUB) OUTPUT VOLTAGE)

Ignition switch ON
after warmed up
engine

Accelerator pedal released

0.3 – 0.5 V

Accelerator pedal depressed
fully

1.7 – 2.2 V

)

ACCEL POSITION

(ABSOLUTE ACCELERATOR
PEDAL POSITION)

Ignition switch ON
after warmed up
engine

Accelerator pedal released

0 – 5%

Accelerator pedal depressed
fully

90 – 100%

)

TARGET THROTTLE POSI

(TARGET THROTTLE VALVE
POSITION)

Ignition switch ON
after warmed up
engine

Accelerator pedal released

0 – 5%

Accelerator pedal depressed
fully

90 – 100%

)

IAC THROTTLE OPENING

(IDLE AIR CONTROL
THROTTLE VALVE OPENING)

It idling with no load after warming up

8 – 25%

)

THROTTLE MOTOR VOLT Ignition switch ON / engine at stop

10.0 – 14.0 V

)

CLOSED THROTTLE POS

(CLOSED THROTTLE
POSITION)

Throttle valve at idle position

ON

Throttle valve opens larger than idle position

OFF

)

THROTTLE MOTOR RELAY At specified idle speed after warming up

ON

* ) VEHICLE SPEED

At stop

0 km/h (0 mph)

)

INJ PULSE WIDTH B1

(FUEL INJECTION PULSE
WIDTH BANK-1)

At specified idle speed with no load after warming
up

1.7 – 3.5 msec.

At 2500 r/min. with no load after warming up

2.0 – 3.6 msec.

)

INJ PULSE WIDTH B2

(FUEL INJECTION PULSE
WIDTH BANK-2)

At specified idle speed with no load after warming
up

1.7 – 3.5 msec.

At 2500 r/min. with no load after warming up

2.0 – 3.6 msec.

Scan tool data

Vehicle condition

Normal condition /

reference values

Engine General Information and Diagnosis: 1A-48

Scan Tool Data Definitions
COOLANT TEMP (ENGINE COOLANT
TEMPERATURE,

°C, °F)

It is detected by engine coolant temp. sensor.

INTAKE AIR TEMP. (

°C, °F)

It is detected by intake air temp. sensor.

ENGINE SPEED (RPM)
It is computed by reference pulses from the camshaft
position sensor.

DESIRED IDLE (DESIRED IDLE SPEED, RPM)
The desired idle speed is an ECM internal parameter
which indicates the ECM requested idle. If the engine is
not running, this number is not valid.

MAF (MASS AIR FLOW RATE, g/s, lb/min.)
It represents total mass of air entering intake manifold
which is measured by mass air flow sensor.

CALC LOAD (CALCULATED LOAD VALUE, %)
Engine load displayed as a percentage of maximum
possible load. Value is calculated mathematically using
the formula: actual (current) intake air volume

÷

maximum possible intake air volume

× 100%

MAP (MANIFOLD ABSOLUTE PRESSURE, in.Hg,
kPa)
This value indicates how much correction is necessary
to keep the air/fuel mixture stoichiometrical.
It is detected by manifold absolute pressure sensor.

THROTTLE POS (ABSOLUTE THROTTLE POSITION,
%)
When throttle position sensor is at fully closed position,
throttle opening is indicated as 0 – 5% and 90 – 100%
full open position.

BAROMETRIC PRESS (kPa, in.Hg)
This parameter represents a measurement of barometric
air pressure and is used for altitude correction of the fuel
injection quantity.

FUEL TANK LEVEL (%):
This parameter indicates approximate fuel level in fuel
tank. As detectable range of fuel level sensor is set as 0
to 100%, however, with some models whose fuel tank
capacity is smaller, indicated fuel level may be only 70%
even when fuel tank is full.

BATTERY VOLTAGE (V)
This parameter indicates battery positive voltage
inputted from main relay to ECM.

BRAKE SW (ON / OFF)
This parameter indicates the state of the brake switch.

INTAKE TUNING SOL (INTAKE MANIFOLD TUNING
VALVE, ON / OFF)
ON: Command for intake manifold tuning valve being
output.
OFF: Command for intake manifold tuning valve not
being output.

FUEL SYSTEM B1 (FUEL SYSTEM BANK-1 STATUS)
FUEL SYSTEM B2 (FUEL SYSTEM BANK-2 STATUS)
Air/fuel ratio feedback loop status displayed as one of
the followings.
OPEN: Open-loop has not yet satisfied conditions to go
closed loop.
CLOSED: Closed-loop using oxygen sensor(s) as
feedback for fuel control.
OPEN-DRIVE COND: Open-loop due to driving
conditions (Power enrichment, etc.).
OPEN SYS FAULT: Open-loop due to detected system
fault.

O2S SENSOR B1 S2 (HEATED OXYGEN SENSOR
BANK-1 SENSOR-2, V) O2S SENSOR B2 S2
(HEATED OXYGEN SENSOR BANK-2 SENSOR-2, V)
It indicates output voltage of HO2S-2 installed on
exhaust pipe (post-catalyst). It is used to detect catalyst
deterioration.

SHORT FT B1 (SHORT TERM FUEL TRIM BANK-1,
%) SHORT FT B2 (SHORT TERM FUEL TRIM BANK-
2, %)
Short term fuel trim value represents short term
corrections to the air/fuel mixture computation. A value
of 0 indicates no correction, a value greater than 0
means an enrichment correction, and a value less than 0
implies an enleanment correction.