Daewoo SCAN-200 Diagnostic Manual

System Diagnostic Manual

EURO

III

DIESEL

Preface

This document is designed to be used for safe and correct diagnosis of the electrically

controlled DAEWOO Diesel DL08 and DV11 engine.

It is recommended that all information in this manual as well as the engine service man-

ual and electrical wiring diagrams be fully understood before diagnosis with the diagno-

sis device (SCAN200) for accurate and effective service and shorter service hours.

If there is any incorrect information or type in this manual, feel free to contact Daewoo

Bus Corporation.

The specifications contained in this manual are subject to change without notice.

We hope this manual will help your service.

November 2009

Daewoo Bus Corporation

A/S team

Table of contents

1. Diagnostic device for system ..............................................7

2. How to check engine DTCs ...............................................9

3. Check sensor data .......................................................11

3-1. Select by group ....................................................11

3-2. Select by function ..................................................15

4. Special mode ............................................................24

4-1. Oscilloscope ........................................................24

4-2. Measuring frequency ................................................32

4-3. Measuring duty ratio ................................................33

5. Troubleshooting by blink codes ...........................................34

1.1 : Faulty coolant temperature sensor .................................34

1.2 : Faulty fuel temperature sensor .................................... 36

1.3 : Faulty charged air temperature sensor .............................38

1.4 : Faulty boost pressure sensor .......................................40

1.6 : Faulty barometric pressure sensor .................................42

1.7 : Faulty oil temperature sensor ......................................44

1.8 : Faulty oil pressure sensor ......................................... 46

2.1 : Faulty battery voltage..............................................48

2.2 : Faulty fuel pressure sensor ........................................50

2.3 : Faulty accelerator pedal ...........................................52

2.4 : Faulty accelerator pedal .......................................... 56

2.5 : Faulty vehicle speed sensor or tachometer .........................58

2.7 : Faulty clutch pedal switch ........................................ 60

2.8 : Faulty foot brake switch .......................................... 62

2.9 : Faulty cruise control switch ....................................... 64

3.2 : Excessive fluctuation of fuel pressure in rail ....................... 66

3.6 : Faulty input signal during ASR operation ...........................70

3.7 :

Faulty CAN communication for ASR/automatic transmission, etc

. ...............72

3.8 : Excessive engine RPM .............................................74

3.9 : Faulty main relay in ECU ......................................... 76

4.1 : Fault due to abnormal engine shut-off .............................78

4.2 : Faulty crank sensor..........................................80

4.3 : Faulty cam sensor ...........................................82

4.4 : Faulty engine RPM sensor ...................................84

4.5 : Faulty EEPROM in ECU ......................................86

4.6 : Recovery function when activation time in ECU is recognized

and is faulty ..............................................88

4.7 : Pressure limit valve open due to excessive rail pressure ......90

4.8 : Faulty power supply source ..................................92

4.9 : Faulty initial voltage from ECU to injector (1, 2, 3) ..........94

5.1 : Faulty initial voltage from ECU to injector (4, 5, 6) .........96

5.8 ~ 6.4 :

Fault related to injector harness connection(#1~#6)

.......98

6.6 : Faulty air heater lamp ......................................100

7.1 : Faulty self-diagnosis lamp ...................................102

7.2 : Faulty air heater relay ......................................104

7.3 : Faulty engine brake #2 output ............................. 106

7.5 : Faulty engine brake #1 output ..............................108

8.3 : Faulty high-pressure pump control ..........................110

8.6 : Faulty engine RPM meter in vehicle.........................112

9.1 : Faulty watchdog function in ECU during engine starting .....114

9.2 ~ 9.8 : Poor cylinder ignition ............................... 116

9.9 : Checking recognition of activation time in ECU ..............118

10.1 : Faulty engine RPM (auxiliary) ..............................120

10.2 : Fault related to accelerator pedal (with foot brake)........122

10.4 : Excessive fluctuation of fuel pressure in rail (by voltage

fluctuation) .............................................124

7

System Diagnostic Manual

1. Diagnositc device for system

There are two ways to check DTCs of the DL08 and DV11 engines for the purpose of

diagnosis: using the diagnosis device (SCAN-200) and checking the blinking number of

the engine CHECK lamp.

This manual mainly describes diagnosis procedures with the device (SCAN-200) for

faster and accurate diagnosis.

1

3

4

5

8

7

6

2

1. ENTER key (to move next step) 5. HELP key (to help screen)

2. Arrow keys (changes selected value or mode) 6. ESC key (to previous step)

3. PgUp and PgDn keys (to upper or lower page) 7. ENTER key (to move next step)

4. Select key (scrolls up and down to select) 8. PWR(power)

[ Figure. SCAN-200 keypad ]

8

System Diagnostic Manual

■

Connecting diagnosis device (SCAN-200)

1. Connect the diagnostic adapter to the vehicle diagnosis adapter.

2. Push the vehicle main switch(Berrery main S/W)to the “ON” position.

3. Push the vehicle ignition switch to the “ON” position.

4. Push the diagnosis device (SCAN-200) “PWR(power)” switch “ON”.

Diagnostic adapter