Section 38 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform))
WARNING: This page is about a different variant/trim than selected.
- 01 On Board Diagnostic (OBD)
- On Board Diagnostic II
- On Board Diagnostic II, Features
- Malfunction Indicator Lamp (MIL) K83 , significance
- Malfunction Indicator Lamp, checking (through MY 1999)
- Malfunction Indicator Lamp (MIL) K83 , checking (from MY 2000)
- On Board Diagnostic (OBD), technical data
- Scan Tool V.A.G 1551 , connecting
- Scan Tool VAS 5051 , connecting
- Diagnostic Trouble Code (DTC) memory, checking and erasing
- DTC table: VAG codes
- Diagnostic Trouble Code (DTC) table: SAE P codes
- Function 03: Output Diagnostic Test Mode (DTM)
- Output Diagnostic Test Mode, performing
- Notes
- Conditions
- Requirements (with air conditioning)
- Work sequence
- Activating Cold Start Injector N108
- Activating EGR Vacuum Regulator Solenoid valve N18
- Activating air conditioning compressor interrupt
- Activating Fuel Cut-off Valve N109
- Activating Wastegate Bypass Regulator valve N75
- Activate Glow Plug Relay J52
- Activate Glow Plug Indicator Lamp K29
- Activating Preheating coolant, low heat output relay J359 (only on vehicles with manual transmission)
- Activating Preheating coolant, high heat output relay J360 (vehicles with manual transmission)
- Activating Malfunction Indicator Lamp (MIL) and Switch K82
- Output Diagnostic Test Mode, performing
- Readiness code
- Measuring value blocks
- Safety precautions
- Measuring value block, reading
- Evaluating measuring value blocks, at idle
- Display group 000 at idle with engine warm, coolant temperature not below 80 ° C (176 ° F)
- Display group 001 at idle with engine warm, coolant temperature not below 80 ° C (176 ° F)
- Evaluation: Injected quantity display
- Evaluation: Modulating Piston Displacement Sensor G149 voltage display
- Display group 002 at idle with engine warm, coolant temperature not below 80 ° C (176 ° F)
- Evaluation: "Throttle position" display
- Evaluation: "Operating condition" display
- Display group 003 at idle with engine warm, coolant temperature not below 80 ° C (176 ° F)
- Evaluation: Air mass drawn in (specified) display
- Evaluation: Air mass drawn in (actual) display
- Display group 004 at idle with engine warm, coolant temperature not below 80 ° C (176 ° F)
- Evaluation: Start of injection (specified) display
- Evaluation: Start of injection display (actual)
- Display group 005
- Display group 006 with ignition switched on
- Evaluation: Brake pedal monitor display
- Evaluation: Cruise control system display
- Display group 007 with ignition switched on (engine cold and not running)
- Evaluation: Fuel temperature display
- Evaluation: Intake Air Temperature display
- Evaluation: Coolant temperature display
- Display group 009
- Display group 012
- Display group 013 at idle speed with engine warm, coolant temperature not below 80 ° C (176 ° F)
- Evaluation: idle speed smooth running control display
- Display group 015
- Display group 016 at idle
- Evaluation: Additional heater display
- Evaluation: Heater element activation display
- Display group 19 with ignition on
- Evaluation: Modulating Piston Displacement Sensor G149 voltage display (start/stop)
- Evaluating measuring value blocks at full load
- Evaluating measuring value blocks at full load
- Display group 000 at Wide Open Throttle (WOT), test drive in 3rd gear, Engine Coolant Temperature 80 ° C (176 ° F) minimum
- Display group 004 at Wide Open Throttle (WOT), test drive in 3rd gear, Engine Coolant Temperature 80 ° C (176 ° F) minimum
- Evaluation: Start of injection (actual) display
- Evaluation: Cold start valve duty cycle display
- Display group 008 at Wide Open Throttle (WOT), test drive in 3rd gear, Engine Coolant Temperature 80 ° C (176 ° F)
- Evaluation: Injected quantity (drivers requirement) display
- Evaluation: Injected quantity limitation via RPM (torque limitation) display
- Evaluation: Injection quantity limitation due to air mass drawn in (smoke prevention) display
- Display group 010 at WOT, test drive in 3rd gear, Engine Coolant Temperature 80 ° C (176 ° F) minimum
- Evaluation: Air mass drawn in display
- Evaluation: Intake manifold pressure (charge pressure) display
- Evaluation: Accelerator pedal position display
- Display group 011 at Wide Open Throttle (WOT), test drive in 3rd gear, Engine Coolant Temperature 80 ° C (176 ° F) minimum
- Evaluation: Manifold Absolute Pressure display (actual)
- Evaluating measuring value blocks at full load
- On Board Diagnostic II
- 23 Diesel Fuel Injection
- Diesel direct injection system, servicing
- General information
- Safety precautions
- Rules for cleanliness
- Component locations, overview
- Injection pump, servicing
- Intake manifold flap, servicing
- Injection pump, removing and installing
- Start of injection, dynamically checking and adjusting
- Injectors, removing and installing
- Injectors, checking
- Injection timing device cover gasket, replacing
- Diesel fuel injection components and functions, checking
- Engine speed sensor, checking
- Manifold Absolute Pressure (MAP) sensor and Barometric Pressure (BARO) sensor, checking
- Engine Coolant Temperature (ECT) sensor, checking
- Brake light switch and brake pedal switch, checking
- Clutch pedal switch, checking
- Intake Air Temperature (IAT) sensor, checking
- Fuel temperature sensor, checking
- Modulating piston displacement sensor G149 and Quantity adjuster N146 , checking
- Needle lift sensor, checking
- Diesel injection timing control range, checking
- Mass Air Flow (MAF) sensor, checking
- Intake manifold flap change-over valve, checking
- Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248-
- Additional signals, checking
- CAN-Bus, checking
- Diesel direct injection system, servicing
- 28 Ignition/Glow plug system