sport mode SSANGYONG MUSSO 2003 Service Manual

2A-6 SUSPENSION DIAGNOSIS DAMPING FORCE CONTROL LOGIC Control Logic that applies on damping force variable suspension is comprised of road sensing driving comfort control logic to increase driving comfort and vehicle speed sensing control logic, anti-roll control logic and anti-dive control
logic to secure control safety.
LogicSensor
Road Sensing Driving Comfort Control LogicSpeedVertical
Sensor (2.5g)Lateral
Sensor (1g)Axle
Acceleration
Sensor (10g) Brake
Anti-bounce Control Logic Anti-roll Control LogicAnti-dive Control Logic
Vehicle Speed Sensing Control Logic
NORMAL CONTROL Initial Stage When ignition switch is "ON", system initialization will be performed for approx. 3 seconds. During this time, warning lamp will stay ON and damping force will be switched to Hard status. After 3 seconds, warning lamp will turn off and normal control status will be restored. Normal Damping Force Control Establishment Damping force will have Soft Medium Hard status in AUTO mode and Medium Hard status in SPORT mode.
When double control items are satisfied at the same time it will be Hard Medium Soft in order.
Normal Damping Force Control Release Control mode release will be "Hard Medium Soft"or "Medium Soft". In case that returned from Hard status to
Medium status during control, it will be done after elapse of setting times. Returning from Medium status to Soft status
will be done immediately without delay.

MUSSO-SPORTS 1A-3
SUPPLEMENT
HUBER EGR
SYSTEM DESCRIPTION The following chart shows the relationship between the input and the output in Huber EGR control unit. Compared to traditional system that only operates theEGR valve with RPM sensor and Micro switch, the HuberEGR control unit bring big differences that of traditionalsystem on the functions.
Input Signal
RPM sensor (CPS)
EGR valve lift sensor
Throttle position sensor (TPS) - M/T
Shift lever position
Throttle position sensor (TPS)
Vehicle speed sensor(VSS) Basic input signal for EGR operation Engine cold or hot signal
Position signal of EGR valve that is triggered by vacuum modulator 1 Transfer the engine load signal to the control unit directly (manual transmission)
TCU (A/T)
EGR
Control
Unit
Coolant temperature sensor (CTS)
Solenoid valve (Control forvacuum modulator 2)
If the control unit determines it is in no-load sharp accel- eration mode after analyzing the input signals, this conver- sion type switch reduces the fuel consumption by cutting off the intake air pressure from
fuel injection ALDA and gen- erating the vacuum pressure. In no-load sharp acceleration
mode, Duty Control ( continu- ous precise control) is acti- vated according to the varia- tions of the input signals when the solenoid valve generates the vacuum pressure in ALDA.
Vacuum modulator 2
The opening value of the modulator is precisely con- trolled by input signals and programmed MAP, and the opening value of EGR valve is also changed by the varia- tions of vacuum pressure to EGR valve. The changed opening value is transferred to the control unit as input signal.
Vacuum modulator 1
TCU in automatic transmission equipped vehicle transfers the information such as driving conditions and speeds into the EGR control unit. EGR control unit uses the shift lever position and vehicle speed as important information for operating the solenoid valve during no-load sharp acceleration mode. In manual transmission, the signal of vehicle speed is transferred into the EGR control unit directly.
Clutch switch
In manual transmission, the clutch switch is the one of core elements to determine driving condition. Output Signal
EGR Control Unit

1A-6 MUSSO-SPORTS
SUPPLEMENT
Coolant Temperature Sensor (CTS)
1. Location: on cylinder block
2. Coolant temperature MAP (4 Stages) T0: 10 ~ 24 °C
T1: 25 ~ 40 °C
T2: 41 ~ 61 °C
T3: above 61 °C
3. If the EGR system is normally defective while engine is cold (or during warming up), it may be caused by incorrect input signal of the coolant temperaturesensor.
4. Resistance between pin 1 and pin 4 of the connector 20 °C: 2250 ± 159.0
50 °C: 836 ± 41.5
80 °C: 321 ± 15.0
120 °C: 113 ± 7.2
KAA5A040 KAA5A060
KAA5A060Solenoid Valve
1. This valve is used in no-load sharp acceleration mode.
2. Solenoid valve (Normal Open type)


 Normal: Solenoid valve opens, then intake
manifold pressure will operate ALDA.


 No-load sharp acceleration mode: Solenoid valve
closes, then vacuum pressure operate ALDA.
3. Operating voltage: approx. 12 V
4. Resistance: approx. 22.4 ± 1.4
5. Check the connections in each passage when supplying or cutting off the operating voltage.
The valve passage to ALDA will be changed when the battery voltage is supplied through EGR control unit.
Changed to ALDA (1 to 3) or vacuum from intake manifold
Changed to ALDA (2 to 3) from modulator 2 (Refer to exhaust gas control mode with no-load sharp acceleration)
TPS sensorSolenoid valve
Intake manifold
ALDAEGR control unit
3
12
Vacuum modulator 2
2
1
3
300
OHM
+-

MUSSO-SPORTS 1A-7
SUPPLEMENT
Throttle Position Sensor (TPS)
1. EGR unit receives TPS signal from TCU (A/T) or input
signal from pin 61 of EGR unit (M/T). The load value of engine is important signal because Huber EGRsystem make EGR valve operate in extended rangeexcept no-load sharp acceleration mode.
2. Resistance check


 Disconnect the TPS sensor connector from fuelinjection pump and measure the entire resistancebetween pin 1 and pin 4. Specified value: 5 k ± 20 %


 Measure the resistance between pin 1 and pin 2 at no-load and full-load. Approx. 10 ~ 20 % of full resistance at no-load Approx. 70 ~ 85 % of full resistance at full-load
3. Voltage check


 The supplied voltage to TPS from EGR unit (for
M/T) or TCU (for A/T) is approx. 5 V. 0.60 ± 0.2 V at no-load 3.85 ± 0.3 V at full-load
VACUUM LINE Installation of modulator and vacuum line (on-vehicle)
E GR n

1A-10 MUSSO-SPORTS
SUPPLEMENT
Test Step 2: Exhaust gas control mode with no-load sharp acceleration (between vacuum pump and ALDA)
Condition:
1. At idling, monitor the changesof boost pressure while changing the accelerator pedalposition slowly.
2. Remove the inlet port from ALDA on fuel injection pump,then install the pressure tester.
Before checking the generation of vacuum pressure, Check whether the boost
pressure from intake manifold can be applied to ALDA or not in the range beyond no-load sharp acceleration mode. Check whether the boost pressure can be generated between intake manifold and ALDA. Boost pressure at idling: approx. 5 ~ 7 mbar. While depressing the accelerator pedal slowly, does the boost pressure of 220 ~ 270 mbar generate at 4,000 ~ 4,500 rpm?
At idling, install the pressure tester into inlet port of vacuum modulator2 and read the negative pressure(specified value: approx. -900mbar) on tester. Install the vacuum tester into inlet port of solenoid valve, and checkwhether the negative pressure isgenerated in no-load sharp accel-eration mode or not, and read thechanges of vacuum pressurewithin specified ranges.
NO
If the boost pressure is not within specified value, appropriatepressure line should be replaced. Check the solenoid valve with the same method in no-load sharpacceleration mode.
YES
YES
Check the vacuum circuit in no-load sharp acceleration mode. Is the approx. -900 mbar of negative pressure generated between vacuum pump line and inlet port of vacuum modulator 2?
In vacuum modulator 2, check the vacuum circuit between inlet port and outlet port. Is the approx. -300 ~ 650 mbar of negative pressure generated in no-load sharp acceleration mode?
Check the vacuum circuit between outlet port of vacuum modulator 2 and inlet port of solenoid valve. Is the approx. -300 ~ 650 mbar of negative pressure generated in no-load sharp acceleration mode?
Install the vacuum tester into outlet port of vacuum modulator, andcheck whether the negativepressure is generated or not in no-load sharp acceleration mode.
Check the intake boost pressure by ranges


 Boost pressure line
between intake manifold and solenoid valve


 Boost pressure line
between ALDA and solenoid outlet valve
NO
Check the voltage supplying and vacuuming
Check whether the EGR control unit can supply the battery voltage tovacuum modulator 2. If can, in no-load sharp acceleration mode,check whether the negative pressuremay vary within specified ranges. Ifthere are not any vacuuming or if thenegative pressure will not be varied,replace the modulator with new one. YES
YES
NO
Replace the vacuum hose in the range.

MUSSO-SPORTS 1A-11
SUPPLEMENT
Install the vacuum tester into out- let port of solenoid valve, andcheck whether the negative pres-sure is generated in no-load sharpacceleration mode or not, and readthe changes of vacuum pressurewithin specified ranges.
YES
In solenoid valve, check whether the vacuum pressure is generated between inlet port and outlet port. When the power is supplied, does the solenoid valve close and the intake boost pressure cut off to complete the vacuum circuit?
NO
Replace the vacuum hose in the range.
Install the vacuum tester into out- let port of solenoid valve, andcheck whether the negative pres-sure is generated in no-load sharpacceleration mode or not, and readthe changes of vacuum pressurewithin specified ranges.
YES
Check whether the vacuum pressure is generated between outlet port of solenoid valve and inlet port of ALDA. Is the approx. -300 ~ 650 mbar of negative pressure generated in no-load
sharp acceleration mode?
NO
Replace the vacuum hose in the range.