On Board Diagnostic (OBD) - 1.8L, AWD (A4 Platform)

• On Board Diagnostic (OBD)
  • On Board Diagnostic (OBD), general information
    • On Board Diagnostic (OBD), characteristics
    • On Board Diagnostic (OBD), technical data
    • Malfunction Indicator Lamp (MIL), significance
      • Notes
      • Function test:
    • EPC warning lamp (malfunction lamp for power accelerator activation) in instrument cluster, significance
      • Notes
      • Function test:
    • VAG1551 Scan Tool (ST), connecting and selecting "Engine Electronics" address word 01
      • Special tools and equipment
      • Test requirements
      • Work procedure
    • VAS5051 tester, connecting and selecting "Engine Electronics" vehicle system 01
      • Notes
      • Special tools and equipment
      • Test requirements
      • Work procedure
  • Diagnostic Trouble Code (DTC) memory
    • Notes
    • DTC memory of Engine Control Module (ECM), checking (scan tool function 02) and erasing (scan tool function 05)
      • Notes
      • Special tools and equipment
      • Work procedure
    • Automatic test sequence
  • Diagnostic Trouble Code (DTC) table: SAE P0-Codes
  • DTCs: P0101 to P0606, VAG 16485 to 16990
    • Fuel and air ratios
  • Diagnostic Trouble Code (DTC) table: SAE P1-Codes
    • Notes
    • DTCs: P1102 to P1853, VAG 17510 to 18261
  • Output Diagnostic Test Mode (DTM) (scan tool function 03)
    • Output Diagnostic Test Mode (DTM), initiating
      • Notes
      • Special tools and equipment
      • Test requirements
      • Work procedure
  • Readiness code
    • Function
    • Readiness code, checking
      • Special tools and equipment
      • Work procedure
    • Readiness code, generating
      • Special tools and equipment
      • Test requirements
      • Work procedure
        • Notes
        • Work step 1: Check DTC Memory
        • Work step 2: Erase DTC Memory
        • Work step 3: Temperature check
        • Work step 4: Diagnostic of leak detection system
        • Work step 5: Diagnostic of tank ventilation system
        • Work step 6: Diagnostic fuel system
        • Work step 7: Diagnostic of Secondary Air Injection (AIR) system
        • Work step 8: Diagnostic operational readiness of oxygen sensor behind catalytic converter
        • Work step 9: Diagnostic of oxygen sensor aging before catalytic converter (monitoring period duration)
        • Work step 10: Diagnostic of oxygen sensor control system
        • Work step 11: Diagnostic of oxygen sensor aging behind catalytic converter
        • Work step 12: Diagnostic of catalytic converter
        • Generating Readiness Code, Work Steps 1-6
        • Generating Readiness Code, Work Steps 7-12
  • Measuring value blocks
    • Safety precautions
    • Read Measuring Value Block (scan tool function 08)
      • Notes
      • Test requirements
      • Work procedure
  • Measuring value blocks, evaluating, display groups 0-9 (basic functions)
    • Display group 1 - basic functions
    • Explanation of 8 digit numeric block
    • Evaluation display group 1, display field 1 - engine speed (idle speed)
    • Display group 2 - basic functions - Mass Air Flow (MAF) sensor
    • Evaluation display group 2, display field 3 - injection timing
    • Evaluation display group 2, display field 4 - mass air taken in
    • Display group 3 - basic function - Mass Air Flow (MAF) sensor
    • Display group 4 - basic functions
    • Evaluation display group 4, display field 2 - control module voltage supply
    • Evaluation display group 4, display field 3 - coolant temperature
    • Evaluation display group 4, display field 4 - intake air temperature
    • Display group 5 - basic function
    • Display group 6 - basic function
  • Measuring value blocks, evaluating, display groups 10-29 (ignition)
    • Display group 10 - ignition
    • Evaluation display group 10, display field 2 - engine load
    • Evaluation display group 10, display field 3 - throttle valve angle
    • Display group 14 - ignition, misfire recognition
    • Evaluation display group 14, display field 3 - number of ignition misfires
    • Display group 22 - ignition, knock control
    • Display group 23 - ignition, knock control
      • Notes
      • Evaluation display groups 22/23, display fields 3 and 4 - ignition timing angle retarding
    • Display group 28 - ignition, knock control
  • Measuring value blocks, evaluating, display groups 30-49, 99, 107 (oxygen sensor control)
    • Display group 30 - oxygen sensor control
      • Notes
      • Meaning of 3 digit number block in display fields 1 and 2
    • Display group 32 - oxygen sensor control, oxygen sensor adaptation values
      • Notes
      • Evaluation display group 32, display field 2 through 4- oxygen sensor adaptation values
    • Display group 33 - oxygen sensor control, oxygen sensor control values
      • Notes
      • Evaluation display group 33, display field 1 - oxygen sensor control before catalytic converter
      • Evaluation display group 33, display field 2 - oxygen sensor voltage before catalytic converter
    • Display group 34 - oxygen sensor control, diagnostic of oxygen sensor before catalytic converter (aging test)
    • Display group 36 - operational readiness of oxygen sensor control behind catalytic converter
      • Notes
      • Evaluation display group 36, display field 1 - sensor voltage of oxygen sensor behind catalytic converter
    • Display group 37 - oxygen sensor control, dwell time test
    • Display group 41 - oxygen sensor control, oxygen sensor heating
    • Display group 43 - oxygen sensor control, diagnostic oxygen sensor behind catalytic converter (aging test)
    • Display group 46 - oxygen sensor control, diagnostic of catalytic converter (conversion test)
    • Display group 99 - oxygen sensor control, operating condition oxygen sensor control
    • Display group 107 - oxygen sensor control, fuel system diagnostic
  • Measuring value blocks, evaluating, display groups 50-69 (RPM regulation)
    • Display group 50 - RPM regulation, operating conditions
    • Display group 54 - RPM regulation
    • Display group 55 - RPM regulation, idle stabilization
      • Notes
      • Explanation of 5-digit indication
    • Display group 56 - RPM regulation, idle stabilization
    • Display group 56 - RPM regulation, adaptation EPC system
    • Display group 61 - RPM regulation, EPC system
    • Display group 62 - RPM regulation, EPC system
    • Display group 63 - RPM regulation, kick down adaptation
    • Display group 66 - cruise control system
      • Notes
      • Explanation of digits in 4 -digit indication, display field 2, switch for brakes, clutch and cruise control.
      • Explanation of digits in the 4 -digit indication, display field 4, operating switch for cruise control
  • Measuring value blocks, evaluating, display groups 70-79 (emissions reduction)
    • Display group 70 - emission reduction, EVAP canister system diagnostic (tank vent system)
    • Display group 71 - emissions reduction, leak diagnostic system
    • Display group 77 - emissions reduction, secondary air diagnostic system
  • Measuring value blocks, evaluating, display groups 86 -89, 100 (readiness code)
    • Display group 89 - trip odometer exhaust MIL on
    • Display group 100 - readiness code
      • Notes
      • Explanation of 8 -digit readiness code
  • Measuring value blocks, evaluating, display groups 110-119 (charge pressure control)
    • Display group 111 - charge pressure regulation, adaptation values for charge pressure limitation
    • Display group 113 - charge pressure regulation
      • Notes
      • Evaluation display group 113, display field 4 - atmospheric pressure
    • Display group 114 - charge pressure regulation
    • Display group 115 - charge pressure regulation
    • Display group 116 - charge pressure regulation
    • Display group 117 - charge pressure regulation
    • Display group 118 - charge pressure regulation
    • Display group 119 - charge pressure regulation
  • Measuring value blocks, evaluating, display groups 120-129 (communication)
    • Display group 120 - anti slip regulation
    • Display group 122 - transmission, only automatic
    • Display group 125 - communication, databus messages