SsangYong Korando III (2010 year). Manual — part 413

15-14

(3) Input/Output for Ignition System

15-15

0000-00

(4) Features

Determines the ignition timing according to input signal

The ECU always analyzes the following elements when determining the ignition timing.

1.

Crankshaft position sensor

Camshaft position sensor

Coolant temperature sensor

Intake air temperature/air mass

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Warm-up of catalytic converter

The ignition timing is retarded for about 20 seconds to operate the catalytic converter according to the

operating temperature under the following conditions:

2.

The coolant temperature is 15°C ~ 40°C at starting.

The idle speed is increased by the idle speed control to help warming up of the catalytic converter

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Idle speed control
The ignition timing can be retarded up to 36° or advanced up to 20˚ to help idle speed control.

The ignition timing control can be performed faster than the control through the throttle valve.

Fuel cut-off in deceleration

The ignition timing is retarded temporarily to prevent abrupt increase of the torque when the

combustion is restarted.

Intake air temperature/coolant temperature

The ignition timing is retarded to prevent knocking if the intake air temperature or coolant temperature

is high. The ignition timing is retarded in the following cases.

3.

4.

5.

The intake air temperature is above 30°C.
The coolant temperature is above 105°C.

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The ignition timing retard for intake air temperature and for coolant temperature is added up for

correction.

ESP/ASR control mode

The ignition timing is retarded to reduce engine torque as fast as possible under the ESP/ASR

control mode.

Knocking control

If knocking occurs in the cylinder, the ignition angle of the corresponding cylinder is retarded. The
coolant temperature is 15˚C to 40˚C when starting.

6.

7.

15-16

5) Warm-Up of Catalytic Converter

(1) Components

Input Components

▶

T-MAP sensor

Coolant temperature

sensor

Crankshaft position

sensor

Output Components

▶

15-17

0000-00

(2) Warm-up Control Function

Low voltage

▶

If low voltage is detected by the ECU, the idle speed increases up to 100 rpm selectively under the

driving mode until the ignition switch is turned off.

Idle speed control

▶

The idle speed is controlled according to the fuel/air mixture when the engine load is changed, the

power steering wheel is turned to its end, the selector lever is in the "D" position and the A/C compressor

is in operation. It is also controlled according to the charge level during the purge control operation.

Ignition timing

▶

The idle speed is controlled according to the fuel/air mixture when the engine load is changed, The
ignition angle can be retarded up to 36˚ or advanced up to 20˚ to help idle speed control.

Air conditioner compressor operation

▶

The air conditioner control unit sends the air conditioner operation signal to the ECU to increase the

throttle valve opening amount in order to prevent reduction of the engine speed when the air conditioner

compressor is in operation at idling.

(3) Warm-up Control Operating Conditions

To make the catalytic converter reach a operating temperature, the ignition timing is retarded for about

20 seconds under the following conditions:

The coolant temperature is 15°C ~ 40°C when the engine is started.

The selector lever is in the "P" or "N" position.

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▶

Also, the idle speed increases to 1100 ~ 1500 rpm simultaneously by the idle speed control. However, as

soon as the selector lever is shifted to the D position, warming up control of the catalytic converter will be

inhibited. The information necessary to perform such control is as follows:

Coolant temperature

Engine rpm

Intake air mass

Recognizing idling status

Selector lever position

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▶
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▶

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