Kia Picanto (JA): ISG (Idle Stop & Go) System / DC/DC Converter
Description and operation
Due
to the considerably more frequent occurrence of starting operations,
the electrical load that occurs often leads to voltage dips in the
vehicle network.
In
order to stabilize the power supply for certain voltage-sensitive
electrical components, a DC/DC converter is used in conjunction with the
ISG function.
The DC DC converter supplies the relay with a voltage that also remains constant during the starting operation.
The DC/DC converter is fitted at the behind of the glove box.
Via
the test leads for input voltage and the start relay , the electronics
decide whether the power is supplied to the output via the bypass or the
DC/DC converter.
In
the bypass mode, the on-board supply voltage is not fed across the
DC/DC converter, rather is transferred directly to the outputs. In the
booster phase, the vehicle voltage is adapted.
| •
| In
the ISG mode, if the power of an audio system turns OFF by drawdown
while “Auto Starting” or “Idle Starting” function operates, replace the
DC/DC converter. |
|
Components and components location
Schematic diagrams
Repair procedures
| 1. | Turn ignition switch OFF and disconnect the battery negative (-) terminal. |
| 2. | Remove the crash pad lower panel.
(Refer to Body (Interior and Exterior) - "Crash Pad Lower Panel")
|
| 3. | Disconnect the DC/DC converter connector (A). |
| 4. | Remove the DC/DC converter (B) after removing the nut and scrow.
DC/DC converter installation nut :
4.0 - 6.0 N·m (0.4 - 0.6 kgf·m, 3.0 - 4.4 lb·ft) |
 |
After
reconnecting the battery negative cable, ISG function does not operates
until the system is stabilized, about 4 hours. If disconnecting the
negative (-) battery cable from the battery during repair work for the
vehicle equipped with AMS function, Battery sensor recalibration
procedure should be performed after finishing the repair work. |
| 1. | Install in the reverse order of removal. |
Specifications
Specification
▷ AGM50L-DIN
Item
Specification
Capacity [20HR / 5HR] (AH) 50/40 Cold Cranking Amperage (A) 560 (SAE) / 560(EN) Reserve Capacity (Min) 80
•
Model type description
•
Cold
Cranking Ampere (CCA): Cold Cranking Amps is a rating used in the
battery industry to define a battery's ability to start an engine in
cold temperatures.
Components and components location
Components
1. ISG OFF switch
Description and operation
Description
The ISG OFF switch on the floor console can be used to deactivate the ISG function.
Other information:
Repair procedures
Removal
1.Disconnect the negative (-) battery terminal.
2.Remove the main crash pad assembly.
(Refer to Body - "Main Crash Pad Assembly")
3.Disconnect the connector of the immobilizer unit and then remove the immobilizer unit (A) after loosening a bolt.
Repair procedures
Inspection
Rear Wiper Motor
1.Remove the connector from the rear wiper motor.
2.Connect positive (+) battery cables to terminal 1 and negative (-) battery cables to terminal 2 respectively.
3.Check that the motor operates normally.
