Engine General Information and Diagnosis: 1A-35
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.
INJ PULSE WIDTH (FUEL INJECTION PULSE WIDTH,
msec.)
This parameter indicates time of the injector drive (valve
opening) pulse which is output from ECM (but injector
drive time of NO.1 cylinder for multiport fuel injection).
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.
SHORT FT B1 (SHORT TERM FUEL TRIM, %)
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.
LONG FT B1 (LONG TERM FUEL TRIM, %)
Long term fuel trim value represents long 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.
TOTAL FUEL TRIM B1 (%)
The value of Total Fuel Trim is obtained by calculating
based on values of Short Term Fuel Trim and Long Term
Fuel Trim. This value indicates how much correction is
necessary to keep the air/fuel mixture stoichiometrical.
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%
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.
O2S SENSOR B1 S1 (HEATED OXYGEN SENSOR-1,
V)
It indicates output voltage of HO2S-1 installed on
exhaust manifold (pre-catalyst).
) TP SENSOR 2 VOLT
Ignition switch ON after
warmed up engine
Accelerator pedal released 1.4 – 1.8 V
Accelerator pedal depressed
fully
3.58 – 4.76 V
) APP SENSOR 1
VOLT
Ignition switch ON after
warmed up engine
Accelerator pedal released 0.5 – 0.9 V
Accelerator pedal depressed
fully
3.277 – 3.915 V
) APP SENSOR 2
VOLT
Ignition switch ON after
warmed up engine
Accelerator pedal released 1.3 – 1.7 V
Accelerator pedal depressed
fully
4.077 – 4.715 V
) ACCEL POSITION
Ignition switch ON after
warmed up engine
Accelerator pedal released 0 – 5%
Accelerator pedal depressed
fully
90 – 100%
) THROTTLE TARGET
POSI
Ignition switch ON after
warmed up engine
Accelerator pedal released 0 – 5%
Accelerator pedal depressed
fully
90 – 100%
) BATTERY
CURRENT
At specified idle speed with no load after warming up 5.0 – 60.0 A
) GENERATOR CONT
DUTY (GENERATOR
CONTROL DUTY)
At specified idle speed with no load after warming up 20.0 – 100.0%
) GENERATOR FIELD
DUTY (GENERATOR
FIELD COIL DUTY)
At spe
cified idle speed with no load after warming up 20.0 – 100.0%
Scan tool data Vehicle condition
Normal condition /
reference values
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