Scan Tool Data Definitions - Suzuki 2000 Grand Vitara SQ625 Service Manual

6-1-30 ENGINE (H25 ENGINE)

SCAN TOOL DATA DEFINITIONS

COOLANT TEMP (ENGINE COOLANT TEMP.,
_C/_F)
It is detected by engine coolant temp. sensor.
INTAKE AIR TEMP (_C/_F)
It is detected by intake air temp. sensor.
DESIRE IDLE (DESIRED IDLE SPEED RPM)
The desired idle speed is an ECM (PCM) internal pa-
rameter which indicates the ECM (PCM) requested idle.
If the engine is not running, the number is not valid.
CLOSED THROT POS (CLOSED THROTTLE
POSITION ON/OFF)
This parameter will read ON when the throttle valve
is fully closed. Or OFF when the throttle is not fully
closed.
IAC FLOW DUTY (%)
This parameter indicates ON (valve open) time rate
within a certain set cycle of IAC valve which controls
bypass air flow.
ENGINE SPEED (RPM)
It is computed by reference pulses from the Camshaft
Position Sensor.
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 val-
ue of 0 indicates no correction, a value greater than
0 means an enrichment correction, and a value less
than 0 implies an enleanment correction.
LONG FT B1 (LONG TERM FUEL TRIM BANK 1,
%)
LONG FT B2 (LONG TERM FUEL TRIM BANK 2,
%)
Long term fuel trim value represents long term correc-
tions 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 im-
plies an enleanment correction.
IGNITION ADVANCE (IGNITION TIMING
ADVANCE FOR NO.1 CYLINDER, deg)
Ignition timing of No.1 cylinder is commanded by
ECM (PCM). The actual ignition timing should be
checked by using the timing light.
BATTERY VOLTAGE (V)
This parameter indicates battery positive voltage in-
putted from main relay to ECM (PCM).
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.
INJ PULSE WIDTH B1 (FUEL INJECTION
PULSE WIDTH BANK 1, msec)
INJ PULSE WIDTH B2 (FUEL INJECTION
PULSE WIDTH BANK 2, msec)
This parameter indicates time of the injector drive
(valve opening) pulse which is output from ECM
(PCM).
THROTTLE POS (ABSOLUTE THROTTLE
POSITION, %)
When throttle position sensor is fully closed position,
throttle opening is indicated as 0 % and 100 % for full
open position.
TP SENSOR VOLT (TP SENSOR OUTPUT
VOLTAGE, V)
Throttle Position Sensor reading provides throttle
valve opening information in the from of voltage.
OXYGEN SENSOR B1 S1 (HO2S BANK 1
SENSOR 1 OUTPUT VOLTAGE, V)
OXYGEN SENSOR B2 S1 (HO2S BANK 2
SENSOR 1 OUTPUT VOLTAGE, V)
It indicates output voltage of HO2S SENSOR 1
installed on exhaust manifold (pre-catalyst).
OXYGEN SENSOR B1 S2 (HO2S BANK 1
SENSOR 2 OUTPUT VOLTAGE, V)
OXYGEN SENSOR B1 S2 (HO2S BANK 2
SENSOR 2 OUTPUT VOLTAGE, V)
It indicates output voltage of HO2S SENSOR 2
installed on exhaust pipe (post-catalyst). It is used to
detect catalyst deterioration.