ESP SSANGYONG NEW REXTON 2012 Service Manual

0000-00
7931-09 Rear Wheel Arch Garnish
- Changed the rear wheel arch garnish
design.
4170-34 Wheel
- Added the wheel types (sputtering type &
diamond cut type). Standard wheel: Alloy
wheel
- Unify the wheel & tire specification
(255/60R18)
7931-01 Side Sill Garnish
- Changed the garnish design (from
independent type to integrated type).Diamond cut typeSputtering type
5210-18 Side Outer Rear Panel
- Changed the side outer rear panel design
according to the changes of rear combination
lamp.

2. INTERIOR
Center fascia upper panel
Center fascia
lower panel
Steering wheel
Center fascia upper panel
Center fascia
lower panel
Steering wheel
7610-01 Steering Wheel and Center Fascia Panel
- Changed the center fascia panel design.
- Changed the color of steering wheel wood grain.
Multi station switch
Hazard switch
Windshield heated
wire switchRear glass/outside rearview mirror
heated wire switch
PAS OFF switch PAS OFF switch
Hazard switch
HDC switch
ESP OFF switch
Windshield heated
wire switchRear glass heated
wire switch
8511-50 Center Fascia Switch and Bezel
- Changed the center fascia design, switches and
location.
- Changed to independent type switch from integrated
type switch.
- Introduced the ESP OFF and HDC switch.

0000-00
Turbocharger intercooler
4. LAYOUT OF INTAKE SYSTEM
HFM sensor (HFM 6.0)
Turbocharger
Supplying the compressed air by turbocharger
Air cleaner
Turbocharger
Turbocharger
Plug in sensor
Air
cleanerTurbochargerProtension graph
Temperature
sensor
Air cleaner
Intake manifold
Coolant port To respective cylinder
From
intercoolerVGT control
actuator
Exhaust gas
Throttle body
Engine operating: Flap
openEngine stopped:
Flap closed
Intake duct
Intake duct
Boost pressure
sensor
Power
Voltage outputGround

0000-00
2) Major Changes and Summary
D20DT Engine Remarks
Engine ECU - Version 3.2
ECU ECU version 3.2 in D20DT engine has
two connectors.
1. E-EGR valve system
2. Throttle body system
3. C3I injector system
Injector
C3I label
Layout of E-EGR system
Throttle body
E-EGR valve
EGR cooler
* Injection nozzle (hole): 7
* Injector label and coding
- D27DTP, D20DT
(20 digits: C3I coding)
* To meet the emission regulation,
especially for reducing NOx, same E-EGR
valve and EGR cooler in power-up engine
(Rexton II) have been introduced.

1. FUEL FLOW OF D20DT (EURO 4) ENGINE
According to input signals from various sensors, engine ECU calculates driver's demand (position of the
accelerator pedal) and then controls overall operating performance of engine and vehicle on that time. ECU
receives the signals from sensors via data line and then performs effective engine air-fuel ratio controls
based on those signals. Engine speed is measured by crankshaft speed (position) sensor and camshaft
speed (position) sensor determines injection order and ECU detects driver's pedal position (driver's
demand) through electrical signal that is generated by variable resistance changes in accelerator pedal
sensor. HFM (Hot Film Air Mass) sensor detects intake air volume and sends the signals to ECU.
Especially, the engine ECU controls the air-fuel ratio by recognizing instant air volume changes from air flow
sensor to decrease the emissions (EGR valve control). Furthermore, ECU uses signals from coolant
temperature sensor and air temperature sensor, booster pressure sensor and atmospheric pressure sensor
as compensation signal to respond to injection starting, pilot injection set values, various operations and
variables.

0000-00
Intercooler
Booster Pressure SensorIntake Manifold
Ground Supply power
Output
voltageTo corresponding
cylinders Coolant
port
Compressed
air
EGR gas
Engine stopped:
flap closed Normal: flap open
Intake duct
Intake duct
Intake manifold
(Throttle body)
Turbo charger
Throttle body

K-Line Communication
ECU starts to communicate by sending the result to pre-glow timer relay through K-Line.
Pre-glow timer relay sends the message with self-diagnosis data for glow plug to ECU.
The glow plug responses only for request.
ECU starts self-diagnosis operation from 2 seconds after power input.
Communication error occurs when: -
-
-
-
-
No response from pre-glow module for a certain period of time
Checksum error
Insufficient byte
3) DTC
DTC Description Error
P1678 GCU circuit is open GCU circuit is open
P1679 GCU circuit is short GCU circuit is short
P1680 GCU circuit is short to ground GCU circuit is short to ground
P1676Communication error Communication error between ECU and
GCU
P1677Defective GCU Communication error between ECU and
GCU
P0671 GCU channel 3 opened circuit GCU channel 3 circuit is open
P0672 GCU channel 4 opened circuit GCU channel 4 circuit is open
P0674 GCU channel 1 opened circuit GCU channel 1 circuit is open
P0675 GCU channel 2 opened circuit GCU channel 2 circuit is open

8510-23
1. SYSTEM DESCRIPTION
1) System Description
The cruise control is an automatic speed control system that maintains a desired driving speed without
using the accelerator pedal.
The vehicle speed must be greater than 38 km/h to engage the cruise control. This feature is especially
useful for motorway driving.
The cruise control system is a supplementary system, which helps the driver to drive the vehicle at a
desired speed without using the accelerator pedal under the traffic condition where the vehicle-to-
vehicle distance meets the legal requirement.

8510-23
2. CONFIGURATION
1) Circuit Diagram
The engine ECU detects the operating conditions of cruise control system, and monitors the braking
performance, vehicle speed, road conditions and ESP system operation. If the engine ECU determines
that there are not any problem to drive in cruise control mode, the vehicle can be operated by cruise
switch signals (decelerating, accelerating, cruising).

8510-23
5) Normal Cancellation of the Cruise Control
The cruise control system will be canceled when one or more items of the following conditions are
applied;
When the brake pedal is depressed or When ESP is activated.
When the cruising speed is downed less than 34 km/h
When applying the parking brake during driving.
When using the clutch in order to shift (M/T only). 1.
2.
3.
4.
Keep the main cruise control switch in the neutral position when not using the cruise control.