SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4LV Injection and Ignition System | Self diagnosis, V.A.G Inspection Service

Fault memory > < Fault table: from code V.A.G?16596/codes SAE P0

Readiness code generating

Special tools and workshop equipment required

t	Fault reader -V.A.G 1551- or vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3B-

t	Engine speed adjuster -V.A.G 1788/10-

Check conditions

l	Fuses no. 15, 18, 20 and 21, OK.

l	Vehicle stationary

l	If the vehicle is equipped with an air conditioner, this must be switched off.

l	Exhaust system between catalytic converter and cylinder head must be free of leaks

l	Coolant temperature, 80 °C, minimum → display group 04, display field 3.

l	Intake air temperature less than 60 °C → display group 04, display field 4.

Work sequence

–	Connect fault reader -V.A.G 1551/V.A.G 1552-. Start engine and enter “Address code” 01 to select engine control unit. (Fault reader: Connecting and selecting the engine control unit → Chapter).

Operation 1: Interrogate fault memory

Indicated on display:

–	Press keys 0 and 2 for function “Interrogate fault memory” and confirm entry with Q -key.

Rapid data transfer      HELP

Select function XX

The display shows the number of faults stored or “No fault recognised!”

If a fault is stored:

–	Rectify faults printed out using fault table:

SAE P0 codes → Chapter

SAE P1 codes → Chapter

If no fault is stored:

–	Press → -key.

Operation 2: Erase fault memory

X Faults recognised!

Indicated on display:

–	Press keys 0 and 5 for the function “Erase fault memory” and confirm entry with Q -key.

Note!

The readiness code returns to zero or is cleared each time the fault memory is cleared.

Rapid data transfer                 HELP

Select function XX

Indicated on display:

Note!

If the ignition is switched off between “Interrogate fault memory” and “Erase fault memory” the fault memory will not be erased.

–	Press → -key.

Note!

Do not shut off engine during the operations be low.

Operation 3: diagnosis of activated charcoal filter system; (fuel tank venting system)

Rapid data transfer                   ->

Fault memory is erased!

Indicated on display:

–	Press keys 0 and 4 for the function “Introduction of basic setting” and confirm entry with Q -key.

Rapid data transfer                 HELP

Select function XX

Indicated on display:

–	Press keys 0, 7 and 0 for “Display group number 70” and confirm entry with Q -key.

Basic setting

Input display group number xxx

Indicated on display: (1...4 = Display fields)

–	If the diagnosis is initiated by engine control unit the display in display field 4 jumps from “Test OFF” to “Test ON”

–	Continue with the engine idling until display field 4 reads:

Specification: “TVV OK”

If the display does not indicate as described:

–	Interrogate fault memory → Chapter.

–	Give 3 throttle bursts and repeat the diagnostic.

If the display indicates as described:

–	Press C -key.

Operation 4: Lambda probe ageing diagnostic (period monitoring)

System in basic setting 70            ->

 1          2           3              4

Indicated on display:

–	Press keys 0, 3 and 4 for “Display group number 34” and confirm entry with Q -key.

Basic setting

Input display group number XXX

Indicated on display: (1...4 = Display fields)

–	Give two throttle bursts, raising rpms over 5000.

–	Set an engine speed of 1500...3900 rpm with speed regulator -V.A.G 1788/10-:

–	Maintain rpms until display in display field 4 changes from “Test OFF” to “Test ON”.

–	Continue with the engine at same rpms until display field 4 reads:

Specification: ”B1-P1 OK”

–	Press → -key.

System in basic setting 34            ->

 1          2           3              4

Indicated on display:

–	Press keys 0 and 8 for the function “Read measured value block” and confirm entry with Q key.

Rapid data transfer                 HELP

Select function XX

Indicated on display:

–	Press keys 0, 3 and 0 for “Display group number 30” and confirm entry with Q -key.

Read measured value block           HELP

Input display group number XXX

Indicated on display: (1...2 = Display fields)

–	Check operational status of Lambda regulation before catalytic converter (display field 1):

Specification: 111 (meaning → Anchor)

–	Check operational status of Lambda regulation after catalytic converter (display field 2):

Specification: 110 (meaning → Anchor)

Note!

The third bit in display field 2 will only change to 1 when the engine is running at part throttle 2500-4000 rpm)

If the specifications are not attained:

–	Interrogate fault memory → Chapter.

If the specifications are obtained:

–	Press → -key.

Operation 5: Catalytic converter diagnosis

Note!

This diagnosis only ends when there are no faults related to the Lambda probes or the activated charcoal system.

Read measured value block 30          ->

 1          2

Indicated on display:

–	Press keys 0 and 4 for the function “Introduction of basic setting” and confirm entry with Q -key.

Rapid data transfer            HELP

Select function XX

Indicated on display:

–	Press keys 0, 4 and 6 for “Display group number 46” and confirm entry with Q -key.

Basic setting                       HELP

Input display group number XXX

Indicated on display: (1...4 = Display fields)

–	Maintain engine speed at 1500...3900 rpm until the display in in display field 4 changes from “Test OFF” to “Test ON”. The catalytic converter temperature in display field 2 must be 300 °C, minimum.

–	Maintain engine speed at 1500...3900 rpm until the display in in display field 4 reads “Cat B1 OK”.

Note!

It may take a few minutes for the reading to change from “Test ON” to “Cat B1 OK”

If the specifications are not attained:

–	Interrogate fault memory → Chapter.

If the specifications are obtained:

–	Press C -key.

Operation 6: exhaust gas system diagnosis

System in basic setting  46           ->

 1          2           3              4

Indicated on display:

–	Press keys 0, 7 and 5 for “Display group number 75” and confirm entry with Q -key.

Basic setting                       HELP

Input display group number XXX

Indicated on display: (1...4 = Display fields)

–	Give 5 throttle bursts, raising RPMs to max.

If the diagnosis is initiated by engine control unit the display in display field 4 jumps from “Test OFF” to “Test ON”

–	Continue with the engine idling until display field 4 reads:

Specification: “Syst. OK”

If the display does not indicate as described:

–	Interrogate fault memory → Chapter.

If the display indicates as described:

–	Press → -key.

–	Press keys 0 and 6 for the “End output” function and confirm input with the Q -key.

–	Interrogate readiness code → Chapter.

System in basic setting  75           ->

 1          2           3              4

Power unit
4LV Injection and Ignition System / Self diagnosis, V.A.G Inspection Service
Readiness code

Fault memory > < Fault table: from code V.A.G?16596/codes SAE P0

SEAT Workshop Service and Repair Manuals

Leon Mk1

Power unit 4LV Injection and Ignition System / Self diagnosis, V.A.G Inspection Service Readiness code

Power unit 4LV Injection and Ignition System / Self diagnosis, V.A.G Inspection Service Readiness code

Power unit
4LV Injection and Ignition System / Self diagnosis, V.A.G Inspection Service
Readiness code

Power unit
4LV Injection and Ignition System / Self diagnosis, V.A.G Inspection Service
Readiness code