DRIVE-BY-WIRE CONTROL OPERATION [L8, LF, L5]
id014046170600
Idle Speed Control
Correction
Correction |
Purpose |
Condition |
Amount of Correction |
---|---|---|---|
A/C load correction
|
Prevent drop in engine speed during A/C operation
|
A/C operation
|
A/C operation → correction
|
Electrical load correction
|
Prevent drop in engine speed during operation of electrical loads
|
Idling or driving
|
Electrical load increases → correction increases
|
Fuel cut recovery decrease correction
|
Reduce shock during fuel cut recovery
|
In deceleration fuel cut zone, decrease by set amount
|
In deceleration fuel cut zone → correction by set amount
|
Accelerate warm up correction
|
Accelerate activation of catalytic converter
|
Idling when engine speed >1,000 rpm and atmospheric pressure >72.0 kPa {540 mmHg, 21.3 inHg}, according ECT
|
ECT decreases → correction increases
|
D range correction
|
Prevent drop in engine speed during shift into D position
|
Input of D range signal (TR switch)
|
Difference between engine speed and turbine speed signal decreases → correction increases
|
Dashpot correction
|
Prevent drop in engine speed caused by insufficient air during deceleration
|
Deceleration
|
Engine speed increases → correction increases
|
Starting correction
|
Prevent drop in engine speed during starting
|
Cranking or just after engine start
|
ECT decreases → correction increases
|
Warm restart correction
|
Prevent drop in engine speed during warm restoring
|
Cranking when ECT above 60°C {140 °F}
|
IAT above 50°C {122 °F}→ increases correction
|
Closed loop correction A
|
Make engine speed approach target engine speed
|
Engine speed while idling (vehicle stopped) deviates from target engine speed (with engine speed above 300 rpm)
|
Below target engine speed → increase correction
Above target engine speed → decreased correction
|
Closed loop correction B
|
When engine speed drops, make engine speed approach target engine speed in zone where closed loop correction A cannot compensate
|
Engine speed below target engine speed during deceleration (with engine speed above 300 rpm) and when closed loop correction A not active
|
Difference between engine speed and target engine speed increases → correction increases
|
Learning correction
|
Store change in air intake amount caused by differences in each engine and secular change and gives closed loop
|
Idling when ECT above 70°C {158 °F} and IAT below 75°C {167 °F} (during closed loop correction A)
|
During idling → average value of closed loop correction A
|
Accelerator Control
Traction Control
Cruise Control (Vehicles Equipped With Cruise Control Switch)
Cruise control operation condition
Cruise control stop condition
Cruise control function
Function List
Function |
Contents |
---|---|
Accelerating
|
• When any of the following conditions are met while driving in cruise control and when the SET+ switch is continuously pressed, the PCM gradually increases the set vehicle speed.
|
Coasting
|
• When the SET- switch is continuously pressed, the PCM gradually decreases the set vehicle speed.
|
Resume
|
• When the RESUME switch signal is input to the PCM during regular driving (cruise control is stopped) and the previously set vehicle speed is stored in the PCM, the PCM sets the set vehicle speed to the previously set vehicle speed and begins control.
|
Tap down
|
• When all of the following conditions are met while driving in cruise control, the PCM decreases the set vehicle speed by 1.6 km/h {1 mph} .
|
Tap-up
|
• When all of the following conditions are met, the PCM increases the set vehicle speed by 1.6 km/h {1 mph} .
|
Downshift
|
• When the following conditions are met, a downshift signal is sent to the TCM via CAN.
|
Excess Engine Speed Control
Excess Vehicle Speed Control