Daewoo SCAN-200 User 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

9
System Diagnostic Manual
Press [ENTER] key after
selecting [ECU Information]
Press
Enter
Key
Press
Enter
Key
Press
Enter Key
Press
Press
Enter Key
* It is necessary to check engine ECU
version before selection.
1. Select [ECU Information].
2. Check the ECU version (4.1:STEP3).
2. How to check engine DTCs
■Push diagnosis device (SCAN-200) ‘PWR’ S/W on
MAIN MENU
Vehicle/engine diagnosis
1] Vehicle/engine diagnosis
2] General OBD-II
3] Snap-shot analysis
4] Tool related mode
5] Special mode
Select the above item.
SELECT CHECK ITEM
DV11 STEP3 engine ECU
1] Check DTC
2] Check sensor data
3] Erase DTC
4] Compression amount test
5] Runup test
6] Remote control
7] ECU information
3 FAULTS FOUND
B=BLINK CODE, C=CURRENT FAULT, H=HISTORICAL FAULT
DV11 STEP3 engine ECU
CB 4.2 Engine RPM sensor (Crankshaft side)
HB 7.1 diagnostic lamp
CB 3.2 Abnormal rail pressure
SELECT VEHICLE TYPE
DV11 STEP3
1] DL08 “STEP3”
2] DV11 “STEP3”
3] DL08
4] DV11
5] CNG (GE12TI & GE08TI)
6] DE12TIS
ECU INFORMATION
DV11 STEP3 engine ECU
VIN : DAEWOO BUS
DATA SET : EUJBE_A02
LAST TEST USER : Tester
S/W VERSION : 4.1
ENGINE TYPE : P41741.A2L and P41741.HEX
Prog .Date :
TEST DATE :
Frame Serial Number : Cus. str2
Vehicle Type Code : BH120F
SYSTEM SELECT
1] Engine system diagnosis
2] Vehicle system diagnosis (ABS/ASR)
3] Vehicle system diagnosis (Keyless entry)
Select the above item.

10
System Diagnostic Manual
Press
[HELP]
key
Inspection
Usage example:
4.2 Abnormal engine RPM sensor
Check DTC [HELP] key Check sensor data Check item
SAE code P0335
[Possible cause]
- Abnormal signal
Faulty crank sensor ---- 8 ■The lamp turns on
when the engine RPM
is over 600 in case of
open or short-circuit of
signal wiring harness.
3 FAULTS FOUND
B=BLINK CODE, C=CURRENT FAULT, H=HISTORICAL FAULT
DV11 STEP3 engine ECU
CB 4.2 Engine RPM sensor (Crankshaft side)
HB 7.1 diagnostic lamp
CB 3.2 Abnormal rail pressure
CB 4.2 ENGINE RPM SENSOR(CRANKSHAFT SIDE)
B=BLINK CODE, C=CURRENT FAULT, H=HISTORICAL FAULT
DV11 STEP3 engine ECU
[SAE Code] : P0335
[Possible cause]
- Abnormal Signal
7 6 5 4 3 2 1 0
○ ○ ○ ○ ● ○ ○ ○
[Fault condition]
- Past fault
[Warning lamp status]
- ON
Help for DTC : Press [HELP] key
7
○
6
○
5
○
4
○
3
●
2
○
1
○
0
○

11
System Diagnostic Manual
3. Check sensor data
3-1. Select by group
■Data group (02-1)
Check sensor data
01. Accelerator pedal depression ······ 0.0 [%]
02. Faulty accelerator pedal sensor ··········· 0
03. Low idle switch ································[ON]
04. Accelerator pedal sensor voltage 410 [mV]
05. Barometric pressure ··············1000 [hPa]
06. Faulty barometric pressure sensor ······· 0
07. Ambient temperature ················ 40.0 [°C]
08. Faulty ambient temperature sensor······ 1
09. Battery voltage····························24.1 [V]
10. Faulty battery voltage ··························· 0
Fix Un Main
▲,▼
Check sensor data
11. Engine brake #1 operation ············ [OFF]
12. Engine brake #2 operation ············ [OFF]
13. ECU condenser #1 voltage·········81.0 [V]
14. Faulty condenser #1 voltage status······ 0
15. ECU condenser #2 voltage·········81.1 [V]
16. Faulty condenser #2 voltage status······ 0
17. Boost pressure ························997 [hPa]
18. Faulty boost pressure sensor ··············· 0
19. Charged air amount············· 2357 mg/st]
20. Charged air temperature ·········· 28.5 [°C]
Fix Un Main
▲,▼
Check sensor data
21. Faulty charged air temperature sensor ··· 0
22. Faulty cam sensor ································ 0
23. Cruise SET/UP S/W ······················ [OFF]
24. Cruise SET/DOWN S/W ················ [OFF]
25. Cruise RESUME S/W ···················· [OFF]
26. Cruise OFF S/W ······························[ON]
27. Cruise speed control················ [ACTIVE]
28. Clutch S/W····························[INACTIVE]
29. Faulty clutch S/W·································· 0
30. Faulty crank sensor ······························ 0
Fix Un Main
▲,▼
Select sensor data LID
DV11 STEP3 engine ECU
01] Data group [02-1]
02] Data group [02-2]
03] Data group [03]
04] Data group [14]
Press
[Enter]
key
Press
[Enter]
key
Press
[PgDn]
key
Press
Enter Key
Select check item
DV11 STEP3 engine ECU
1] Check DTC
2] Check sensor data
3] Erase DTC
4] Compression amount test
5] Runup test
6] Remote control
7] ECU information
Select sensor data type
DV11 STEP3 engine ECU
1] Select by group
2] Select by function
Press
[PgDn] key

12
System Diagnostic Manual
Check sensor data
31. Coolant temperature················· 25.0 [°C]
32. Faulty coolant temperature sensor ······· 0
33. Engine brake #1 S/W············[INACTIVE]
34. Engine brake #2 S/W············[INACTIVE]
35. Driving mode ········································ 0
36. Normal engine RPM ····························· 1
37. Faulty engine RPM ······························· 0
38. Engine RPM ································ 0 [rpm]
39. Fuel supply pressure ················0.3[MPa]
40. Faulty fuel supply pressure sensor······· 0
Fix Un Main
▲,▼
Check sensor data
71. Self-diagnosis fault blink code 1 ··········· 0
72. Self-diagnosis fault blink code2 ············ 0
73. No. of trouble code ······························· 0
74. Self-diagnosis S/W ························ [OFF]
······································································
01. Accelerator pedal depression ······ 0.0 [%]
02. Faulty accelerator pedal sensor ··········· 0
03. Low idle switch ································[ON]
04. Accelerator pedal sensor voltage· 410 [mV]
05. Barometric pressure ··············1000 [hPa]
Fix Un Main
▲,▼
Check sensor data
61. External fuel supply amount ·· 0.0 [mg/st]
62. Fuel supply amount ··············· 0.0 [mg/st]
63. Limited fuel supply amount· · 87.2 [mg/st]
64. PTO RPM control fuel amount· · 0.0 [mg/st]
65. Faulty injector 1 (DV11:1)····················· 0
66. Faulty injector 2 (DV11:4)····················· 0
67. Faulty injector 3 (DV11:2)····················· 0
68. Faulty injector 4 (DV11:5)····················· 0
69. Faulty injector 5 (DV11:3)····················· 0
70. Faulty injector 6 (DV11:6)····················· 0
Fix Un Main
▲,▼
Check sensor data
41. Faulty cooling fan speed sensor··········· 0
42. Cooling fan speed·················· 2000 [rpm]
43. Fuel temperature ······················ 25.5 [°C]
44. Faulty fuel temperature sensor············ 0
45. Ignition switch ··································[ON]
46. Engine oil pressure··················845 [hPa]
47. Faulty engine oil pressure sensor········· 0
48. Engine oil temperature ············· 27.1 [°C]
49. Faulty engine oil temperature sensor ··· 0
50. Parking brake switch ··············· [ACTIVE]
Fix Un Main
▲,▼
Check sensor data
51. Retarder S/W························[INACTIVE]
52. Foot brake S/W #1················[INACTIVE]
53. Foot brake S/W #2················[INACTIVE]
54. Foot brake S/W #3················[INACTIVE]
55. Faulty foot brake S/W ··························· 0
56. Engine stop S/W···························· [OFF]
57. Gear ratio····························0.500 [min/s]
58. Vehicle speed ························· 0.0 [km/h]
59. Faulty vehicle speed sensor ················· 0
60. Faulty fuel high-pressure generator······ 0
Fix Un Main
▲,▼
Press
[PgDn]
key
Press
[PgDn]
key
Press
[PgDn] key
Press
[PgDn] key
Press
[PgDn] key