Readiness Code, Creating
READINESS CODE, CREATING
- Study following chart. Pay special attention to bits 5, 6, 7 and 8
Number Revelance Chart In Display Field 4:
NOTES:
- An "x" in the diagnostic status table specification means the display can be either 0 or 1
- If a particular bit that you are watching in the Readiness code is obtained sooner than the time specified in the chart, you can immediately proceed to the next work step
- There must not be a malfunction stored in DTC memory and there must be no malfunctions detected during diagnosis
- During the Work step sequence, the ignition must not be switched off
Special tools, testers and auxiliary items
- VAG 1551/1552 scan tool with VAG 1551/3 adapter cable
Test sequence
- Connect VAG 1551/1552 Scan Tool (with ignition switched ON) and select "Engine Electronics" address word 01. VAG 1551 Connecting and Selecting Address Word 01
Work step: 1
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -2- to select "Check DTC Memory function 02 and press -Q- button to confirm input
The number of malfunctions stored or "No DTC recognized" will be shown on the display
X DTC recognized ->
- Press -> button
Work step: 2
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -5- to select "Erase DTC Memory" function 05 and press -Q- button to confirm input
Indicated on display
Rapid data transfer ->
DTC Memory is erased
- Press -> button
Work step: 3
Diagnosis: To check throttle body adaptation
Indicated on display
Rapid data transfer HELP
Select function XX
- Switch ON ignition but do NOT start engine
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -0-, -9- and -8- to input display group 098 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 98 ->
1 2 3 4
- Check the specifications in display field 3 and 4
- Press -> button
Work step: 4
- Start engine and let idle
Work step: 5
Diagnosis: Leak diagnosis for fuel tank venting system
NOTE: Not all vehicles have this system installed if this system is not found on the vehicle you are working with; skip this workstep
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -5- and -3- to input display group 153 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 153 ->
1 2 3 4
- Run engine at idle and check specifications after 60 seconds
- Press -> button
Work step: 6
Diagnosis: Engine warmup
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input
Indicated on display
Read Measuring Value Block HELP
Input display group number XXX
- Press buttons -1-, -0- and -3- to input display group 103 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
Read Measuring Value Block 103 ->
1 2 3 4
- Increase engine speed to 3000-3500 RPM and check specifications after 60 seconds
- Press -> button
Work step: 7
Diagnosis: Secondary Air Injection system
NOTE: Not all vehicles have this system installed, If this system is not found on the vehicle you are working with; skip this workstep
- Vehicle stationary, engine at idle
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and 4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -6- and -0- to input display group 160 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 160 ->
1 2 3 4
- Start engine and let idle, check specifications after 20 seconds
- Press -> button
Work step: 8
Diagnosis: Engine warmup continued (calculated temperature of Three Way Catalytic converter)
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input
Indicated on display
Read Measuring Value Block HELP
Input display group number XXX
- Press buttons -1-, -0- and -3- to input display group 103 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
Read Measuring Value Block 103 ->
1 2 3 4
- Increase engine speed to 2200-3300 RPM and wait until catalyst temperature (field 3) reaches specification
- Press -> button
Work step: 9
Diagnosis: HO2S aging (regulating frequency extended)
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -3- and -1- to input display group 131 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 131 ->
1 2 3 4
- Run engine at idle and check specifications
- Press -C- button
Work step: 10
Diagnosis: Fuel adaptation under partial load
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -2- and -5- to input display group 125 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 125 ->
1 2 3 4
- Test drive per the following conditions
Road test procedure
- 10 minutes duration minimum
- Engine coolant temperature 80 °C (176 °F) minimum
- Briefly depress accelerator pedal to wide open throttle (once during road test) and accelerate until engine speed is above 5000 RPM
- Cruise between 2700-3000 RPM for 4 seconds with NO decels
NOTE: Avoid deceleration fuel put-off during this diagnosis, as this causes the three way catalytic converter to store oxygen, and diagnosis will be blocked for at least 10 seconds
- Automatic transmission: Drive range 2
- Manual transmission: 2nd gear
- Check specs during test drive (second technician necessary)
WARNING: When driving or working in Airbag equipped vehicles: NEVER allow test equipment or tools in the airbag expansion zones. A sudden stop or impact could push those objects against the driver or passenger resulting in possible injuries. Instead; safely secure tools or test equipment on the passenger side floor where it can safely be read by a second technician.
- Continue test drive until all specifications are obtained
Work step: 11
Diagnosis: Fuel adaptation during idle
Test conditions
- Bring vehicle to stationary position and let idle
Indicated on display (1-4 = Display fields)
System in Basic Setting 125 ->
1 2 3 4
- Check specifications after 30 seconds
- Press -C- button
Work step: 12
Diagnosis: HO2S aging (regulating frequency extended)
Test conditions
- Vehicle stationary
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -3- and -0- to input display group 130 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 130 ->
1 2 3 4
- Raise engine RPM to 2200-2800 for 20 seconds, check specs
- Press -C- button
Work step: 13
Diagnosis: Three Way Catalytic Converter
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -3- and -6- to input display group 136 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 136 ->
1 2 3 4
- Raise engine speed to 2700-3300 RPM and check specs after 120 seconds
- Press -C- button
Work step: 14
Diagnosis: Fuel tank venting system (EVAP canister purge regulator valve)
Test conditions
- Vehicle stationary
- All electrical consumers switched off (radiator coolant fan must not run during the check)
- A/C switched off
NOTE: Engine must not be under load during diagnosis or the diagnostic will be interrupted and not started again until engine is revved-up
- Press buttons -0- and -4- to select "Basic Setting" tunction 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -5- and -0- to input display group 150 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 150 ->
1 2 3 4
- Run engine for 30 seconds at idle and check specifications
NOTE: For Display Group 150, look for either display field 2 or display field 3 specification fulfillment, but not both. Fulfillment of either display is acceptable.
- Press -> button
Work step: 15
Read readiness code. Readiness Code, Reading (Function 15)
If the readiness code not OK
- Perform optional work steps 16 through 24. See below.
Work step: 16
Diagnosis: Vehicle Speed Sensor
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -8- and -0- to input display group 180 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 180 ->
1 2 3 4
- Perform road test per the following conditions
- Hold engine speed between 2500 and 3000 RPM for 5 seconds
- Automatic transmission: Drive range 2
- Manual transmission: 3rd gear
...then release accelerator pedal for 3 seconds
- After 3 seconds, vehicle speed must still be 20km/h (13 mph) minimum
- Check specs during test drive (second technician necessary)
WARNING: When driving or working in Airbag equipped vehicles: NEVER allow test equipment or tools in the airbag expansion zones. A sudden stop or impact could push those objects against the driver or passenger resulting in possible injuries. Instead; safely secure tools or test equipment on the passenger side floor where it can safely be read by a second technician.
- Press -C- button
Work step: 17
Diagnosis: Knock Sensor
Test conditions
- Vehicle stationary
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -4- and -5- to input display group 145 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 145 ->
1 2 3 4
- Increase engine speed to at least 2500 RPM and check specifications after 15 seconds
- Press -> button
Work step: 18
Diagnosis: HO2S (before three way catalytic converter)
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input
Indicated on display
Read Measuring Value Block HELP
Input display group number XXX
- Press buttons -1-, -1- and -5- to input display group 115 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
Read Measuring Value Block 115 ->
1 2 3 4
- Increase engine speed to 2200-2800 RPM and check the specifications
- Press -> button
Work step: 19
Diagnosis: HO2S (after three way catalytic converter)
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -4- to select "Basic Setting" function 04 and press -Q- button to confirm input
Indicated on display
Basic Setting HELP
Input display group number XXX
- Press buttons -1-, -1- and -6- to input display group 116 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
System in Basic Setting 116 ->
1 2 3 4
- Increase engine speed to 2200-2800 RPM and check specifications after 15 seconds
- Press -> button
Work step: 20
Diagnosis: HO2S heating (before three way catalytic converter)
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input
Indicated on display
Read Measuring Value Block HELP
Input display group number XXX
- Press buttons -1-, -2- and -0- to input display group 120 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
Read Measuring Value Block 120 ->
1 2 3 4
- Raise engine RPM to 2200-2800 and check specs
- Press -3- button (VAG 1551 scan tool) or up arrow button (VAG 1552)
Indicated on display (1-4 = Display fields)
Read Measuring Value Block 121 ->
1 2 3 4
- Increase engine speed to 2200-2800 RPM and check specifications
- Press -C- button
Work step: 21
Diagnosis: Throttle valve control module
NOTE: There are no specifications for this diagnosis. The values in the display fields are typical for this diagnosis. If other values are shown it does not indicate a system malfunction. The diagnostic functions run in the background during the check
- Press buttons -1-, -4- and -0- to input display group 140 and press -Q- button to confirm input
Indicated on display (1-4 = Display fields)
Read Measuring Value Block 140 ->
1 2 3 4
- Run engine at idle
Indicated on display (1-4 Display fields)
Read Measuring Value Block 141 ->
1 2 3 4
- Run engine at idle
- Press -3- button (VAG 1551) or up arrow button (VAG 1552)
Indicated on display (1-4 = Display fields)
Read Measuring Value Block 142 ->
1 2 3 4
- Run engine at idle
- Press -> button
Work step: 22
- Read readiness code. Readiness Code, Reading (Function 15)
- Press buttons -0- and -6- to select "End output" function 06 and press -Q- button to confirm input