| 1. Auto stop or Auto start condition
(If all of the below condition are satisfied) |
Items
|
State
|
Remark
|
Driving conditions
|
ISG OFF Switch
|
off
|
|
Switch
(seat/door/hood)
|
Closed
|
|
Lever position
|
D or N range
|
Prohibit operation on gear ‘P, R’
|
Brake pedal
|
Pressed
|
Auto Stop
|
Released
|
Auto Start
|
Vehicle speed
|
Vehicle speed = 0 Mph
|
After driving higher than 8kph (5 Mph)
|
Air conditioning
system
|
Ambient temperature is between
-2 ~ 35 °C (28.4 ~ 95 °F)
|
|
Engine Coolant Temperature (ECT)
|
Over 78 °C (172.4 °F)
|
|
Brake Pressure
|
Below -35kpa
|
|
Battery conditions
|
SOC
|
Over 77%
|
To protect Battery
|
Temperature
|
2 ~ 55 °C (35.6 ~ 131 °F)
|
|
Steering wheel
|
Operating angle
|
Below 180°
|
|
Parking condition
|
Slope
|
Up hill <12%, Down hill < 8%
|
|
ISG related part error
|
Sensor Error
|
Brake Booster Pressure Sensor
|
Brake Master Cylinder Pressure
|
Sensor, Brake Pedal Sensor,
|
APS, Battery Sensor
|
Related System Error
|
TM Electronic Auxiliary Pump
|
ESC System Defect Mode
|
CAN Communication Error
|
Engine Limp Home Mode
|
| 2. Forced re-start conditions (If any
of the below condition is not satisfied) |
Component
|
Conditions
|
State
|
Remark
|
Conditions for safety
|
Low pressure for braking system
|
Over -35kpa
|
|
Low battery voltage
|
Below 12.1V for 180 sec
|
|
Active defroster of front glass
|
On
|
|
When inertial speed reach 1Mph with (down hill)
|
Over 1Mph (Kph)
|
Inertial Speed
|
Open the door or unfasten driver’s seat belt
|
Open
|
Brake Pedal Pressed
|
Elapsed much of stop time
|
On the steep slope way
|
Conditions for convenience
|
Turn on the air-conditioner or max blower speed or bad performance
of air conditioning and heating
|
Active ‘ISG OFF’ button
|
Sign of forced auto re-start
|
Blinking of lamp for 5 second and indicating on cluster
|
| 3. Restriction conditions for Auto-Stop
operation |
※ To protect system and safety auto-stop system is restricted below the
conditions
Large steering angle when car is stop
|
Low brake operating pressure
|
Turn on the air conditioner with max blower
|
When battery Condition is poor (low SOC)
|
Active defroster of front or rear glass
|
Unfasten driver’s seat belt or open the door and hood
|
On the steep slope way
|
With ISG system errors, and other diagnosis
|
| 4. Restriction condition for auto Re-Start
operation |
Open hood (have to restart by key for repairman’s safety )
|
| 5. Restriction condition for OBD Check
& Emission control |
Auto Stop system
will be limited
|
During Canister purge monitoring
|
During OBD check
|
To restrict continuous Cranking
(for Emission Control)
|
Start Motor can operate for two seconds at the longest (just once)
|
|
The ISG system is strongly networked with the power management.
In the event of battery replacement, disconnection of the battery terminal
or after changing the engine management system, the reference data regarding
the battery charge state and battery condition can be lost.
They are only available again a closed-circuit current measurement
of approximate 4 hours in which the vehicle may not be wakened. In this
time, the ISG system is inactive.
|
|
ISG system deactivation by fault.
| -
|
Fault in communication line (LIN/CAN)
Fault Electric oil pump
Fault ESC System
Fault Limp home mode
|
| -
|
Fault brake booster vacuum pressure sensor
Fault Brake master cylinder pressure sensor
Fault Brake pedal switch
Fault Battery sensor
|
When the ISG related sensors or system error occurs, the ISG OFF
switch lights up. Especially when the battery sensor is replaced or
reinstalled, the vehicle must be placed in the ignition switch OFF for
about 4 hours for recalibration.
The ISG function is operated about 4 hours later normally. But
in the case of first 25 times, the ISG function can be operated regardless
of recalibration.
|
|
When the engine is in Idle stop mode, it's possible to restart
the engine without the driver taking any action.
Before leaving the car or doing anything in the engine room area,
stop the engine by turning the ignition key to the LOCK position or
removing it.
|
1.
Vehicle moving.
2.
The transmission lever position is D-range. The brake pedal is
released.
3.
The ...
Components Location
1. Battery sensor
2. Brake Booster Vacuum Pressure Sensor (BBVPS)
3. AGM battery
4. DC/ DC Converter (LDC) [200W]
5. DC/ DC Converter (LDC) [400W]
...
Hyundai Elantra MD/UD: Operation Condition for the ISG function
