SEAT Workshop Service and Repair Manuals

Notes:

• ◆ Idling speed, ignition timing and CO content not adjustable.
• ◆ The idling speed is regulated to specification by the throttle valve positioner in conjunction with the DIS function.
• ◆ CO content regulated by Lambda regulation. Faults in Lambda control are detected in self-diagnosis and stored in fault memory.

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3

Check conditions

• ● Exhaust system between catalyst and cylinder head must be free of leaks
• ● All electrical consumers, e.g. lights and rear window heating must be switched off
• ● If the vehicle is equipped with an air conditioner, this must be switched off.
• ● On vehicles with automatic gearbox selector lever in "P" or "N" position
• ● Coolant temperature must be at least 85 °C, =>display group 04, display zone 3.
• ● Intake air temperature less than 60°C
  =>display group 04, display zone 4

Test sequence

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit. When doing this the engine must be running at idling speed.
  (Connecting fault reader and selecting engine control unit .)
• ‒ Interrogate fault memory, if necessary, repair any faults and then erase fault memory => Page 01-16, interrogating and erasing fault memory.
• ‒ Read-out the readiness code=> Page 01-64.
• ‒ Then:
• ‒ Leave fault reader V.A.G 1551connected.
• ‒ Continue running engine at idling speed.

• ‒ Press keys 0 and 4 for the function "Introduction of basic setting" and confirm entry with Q key.

• ‒ Press keys 0, 0 and 1 for "Display group number 1" and confirm entry with Q key.

Note:

In the "System in basic setting" function the activated charcoal filter solenoid valve 1 (N80) is closed and the air conditioner compressor switched off.

• ‒ Check the adjustment conditions for basic setting in display zone 4:
      Specification: 1x111111
  Significance of the numbers => Page 01-124
• ‒ Briefly increase engine speed (rev- up) and then allow engine to run at idling speed for 2 minutes.

Checking idling speed

• ‒ Change to display group 54 as follows:
• ‒ Press C key.
• ‒ Press keys 0, 5 and 4 for "display group 54" and confirm entry with the Q key.

Note:

In the "System in basic setting" function the activated charcoal filter solenoid valve 1 (N80) is closed and the air conditioner compressor switched off.

• ‒ Check specifications for idling in display zones 1...4.

If the specifications are not obtained:

• ‒ Carry out test drive.

Observe the valid safety precautions when carrying out a road test => Page 24-32.

• ‒ Again interrogate the control unit fault memory.
• ‒ Read-out the readiness code=> Page 01-64.
• ‒ Repeat the idling check.

If the specifications are not obtained again:

• ‒ Check throttle valve control part
  => Page 24-57.
• ‒ Check the operating condition of engine
  => Page 24-138.
• ‒ Check intake system for leaks (unmetered air) => Page 24-108.