SEAT Workshop Service and Repair Manuals

The final control diagnosis activates the following components in the stated sequence:

Notes:

• ◆ The final control diagnosis can only be carried out if the engine is stationary and ignition switched on.
• ◆ The final control diagnosis will be aborted if the engine is started or a rotational impulse is recognised.
• ◆ During the final control diagnosis the individual final controls will be activated for approx. 60 seconds or until advancing to the next final control by pressing the ⇒ button.
• ◆ The final control diagnosis can be aborted by pressing the C key so that it need not be continued with the ⇒key to the end. This is especially important because the injectors can be actuated with the ⇒key according to the firing order and inject fuel.
• ◆ The electric fuel pump will run during the complete final control diagnosis.
• ◆ The final controls are checked acoustically or by touching.
• ◆ The final control diagnosis will be aborted after 10 minutes.
• ◆ Run engine briefly first if there is a requirement to repeat final control diagnosis.

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
• ◆ Test box V.A.G 1598/31
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Diode test lamp V.A.G 1527

• ◆ Adapter set V.A.G 1594
• ◆ Current flow diagram

Test conditions

• ● → The main fuses must be OK.

• ● → All fuses must be OK.
• ● The battery voltage must be at least 11.5 V.
• ● Ignition on, engine not running

Work sequence

• ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
  (Connecting fault reader and selecting engine control unit .)

• ‒ Operate fault reader taking into account the information on the display:
• ‒ Press keys 0 and 3 for the function "Final control diagnosis".

Activating activated charcoal filter solenoid valve 1 (N80):

• ‒ Confirm input with Q key.

• The activated charcoal filter solenoid valve 1 must click until the next final control is activated by pressing ⇒key.

The valve clicks but a fault is still suspected (valve does not open or close):

• ‒ → Pull hose off solenoid valve 1 and connect an auxiliary hose to free valve connector.
• ‒ Blow into auxiliary hose during final control diagnosis (in direction of throttle valve control part).
      Valve must open and close

If the solenoid valve does not click:

• ‒ → Pull the 2 pin connector off solenoid valve 1 (N80) -arrow-.

• ‒ → Connect diode test lamp V.A.G 1527 using adapter cables from V.A.G 1594 to detached connector.
      The LED must flash (bright/darker)

LED flashes:

• ‒ Press the C key now to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Renew solenoid valve.

=> Repair group 20; Activated charcoal filter system; Removing and installing parts of activated charcoal filter system

• ‒ 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.

LED does not flash:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Remove battery.

• ‒ → Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.
• ‒ Check wire between test box socket 64+2 pin connector contact 2 for open circuit using current flow diagram.
      Wire resistance: max. 1.5 ω
• ‒ Additionally check wire for short to battery positive and earth.
      Specification: ∞ω
• ‒ Check wire between 2 pin connector contact 1 and fuel pump relay (J17) for open circuit using current flow diagram.
      Wire resistance: max. 1.5 ω

If no wiring fault is detected:

• ‒ Renew engine control unit => Page 24-150.
• ‒ 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.

Activating secondary air inlet valve (N112):

• ‒ Press ⇒key.

• The secondary air inlet valve must run until the next control element is activated by pressing the ⇒ key.

If the valve does not click:

• ‒ Remove noise insulation tray.

• ‒ → Pull 2-pin connector off secondary air inlet valve -arrow-.

• ‒ → Connect diode test lamp V.A.G 1527 using adapter cables from V.A.G 1594 to detached connector.
      The LED must flash (bright/darker)

LED flashes:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Replace secondary air inlet valve (N112):

=> Repair group 26; Secondary air system; Removing and installing parts of the secondary air system

• ‒ 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.

LED does not flash:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Remove battery.

• ‒ → Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.

• ‒ → Check wire for open circuit between test box socket 44 and 2-pin connector contact 2 using current flow diagram.
      Wire resistance: max. 1.5 ω
• ‒ Additionally check wire for short to battery positive and earth.
      Specification: ∞ω
• ‒ Check wire between 2 pin connector contact 1 and fuel pump relay (J17) for open circuit using current flow diagram.
      Wire resistance: max. 1.5 ω

If no wiring fault is detected:

• ‒ Replace engine control unit
  => Page 24-150.
• ‒ 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.

Activating secondary air pump relay (J299):

• ‒ Press ⇒key.

• The secondary air pump relay (J299) activates the secondary air pump motor, and this must run at intervals until the next control element is activated by pressing the ⇒ key.

If the secondary air pump motor (V101) does not run at intervals:

• ‒ Remove noise insulation tray.

• ‒ → Pull 2-pin connector off secondary air pump motor -arrow-.

• ‒ → Connect diode test lamp V.A.G 1527 using adapter cables from V.A.G 1594 to detached connector.
      The LED must flash

LED flashes:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Renew secondary air pump motor (V101):

=> Repair group 26; Secondary air system; Removing and installing parts of secondary air system

• ‒ 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.

If the LED does not flash but the secondary air pump relay clicks:

• ‒ Switch off ignition.
• ‒ → Check the wire between secondary air pump motor (V101) contact 1 and body earth for open circuit.
      Wire resistance: max. 1.5 ω

If no fault in wire is detected:

• ‒ → Pull secondary air pump relay -relay position 22- out of lower relay carrier behind multi-function unit.

Notes:

• ◆ If tools are necessary to pull relays or control units out of the relay plate, first disconnect battery earth strap.
• ◆ Before disconnecting battery earth strap obtain code for radios with anti-theft coding.

• ‒ → Check wiring for open circuit between connector contact 2 on secondary air pump motor and contact 2 of relay plate.
      Wire resistance: max. 1.5 ω

If no fault in wire is detected:

• ‒ → Check voltage supply at contact 1 (terminal 30) for secondary air pump relay (J299).

If voltage supply is OK:

• ‒ Replace the secondary air pump relay (J299).
• ‒ 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.

If the LED does not flash and the secondary air pump relay does not click:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.

• ‒ → Pull secondary air pump relay -relay position 22- out of lower relay carrier behind multi-function unit.

Notes:

• ◆ If tools are necessary to pull relays or control units out of the relay plate, first disconnect battery earth strap.
• ◆ Before disconnecting battery earth strap obtain code for radios with anti-theft coding.

• ‒ Introduce final control diagnosis again and activate secondary air pump relay (J299).

Note:

If it is necessary to repeat the final control diagnosis, first allow the engine to run briefly.

• ‒ → Using adapter cables from V.A.G 1594, connect diode test lamp V.A.G 1527 to contacts 3 and 4 on the relay plate.
      The LED must flash

LED flashes:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Renew secondary air pump relay (J299).
• ‒ 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.

LED does not flash:

• ‒ → Connect diode test lamp V.A.G 1527 to contact 3 of relay plate and body earth using adapter cables from V.A.G 1594.
      The LED must flash.

LED does not flash:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Check wiring for open circuit between contact 4 of relay plate and battery (+) using current flow diagram.
      The LED must light up.

LED lights up:

• ‒ Remove battery.
• ‒ → Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.
• ‒ Check wire for open circuit between test box socket 46 and contact 3 on relay plate using to current flow diagram.
      Wire resistance: max. 1.5 ω

If no wiring fault is detected:

• ‒ Replace engine control unit
  => Page 24-150.
• ‒ 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.

Activating intake manifold change-over valve (N156):

• ‒ Press ⇒key.

• The twin path intake manifold change-over valve must click until the next final control is activated by pressing the ⇒key.

Note:

If there is sufficient vacuum the twin path intake manifold change-over valve (N156) activates the intake manifold change-over valve actuating element. The change-over valve is located below the intake manifold, on right next to the secondary air inlet valve. Checking intake manifold change-over => Page 24-105.

If the valve does not click:

• ‒ → Pull 2-pin connector off twin path intake manifold change-over valve (N156) -arrow-.

• ‒ → Connect diode test lamp V.A.G 1527 using adapter cables from V.A.G 1594 to detached connector.
      The LED must flash (bright/darker)

LED flashes:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Renew intake manifold change-over valve (N156).
• ‒ 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.

LED does not flash:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Remove battery.

• ‒ → Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.

• ‒ → Check wire for open circuit between test box socket 104 and 2-pin connector contact 2 using current flow diagram.
      Wire resistance: Max. 1.5 ω
• ‒ Additionally check wire for short to battery positive and earth.
      Specification: ∞ω
• ‒ Check wire between 2 pin connector contact 1 and fuel pump relay (J17) for open circuit using current flow diagram.
      Wire resistance: max. 1.5 ω

If no wiring fault is detected:

• ‒ Replace engine control unit
  => Page 24-150.
• ‒ 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.

Actuating camshaft adjustment valve 1:

• ‒ Press ⇒key.

• The solenoid valve for the inlet camshaft adjustment will be actuated until the next final control is actuated by pressing ⇒ key.

Note:

Only valve -1- is actuated (barely audible) during this final control diagnosis.

If a fault is suspected:

• ‒ → Pull 2-pin connector -1- off valve.

• ‒ → Connect diode test lamp V.A.G 1527 using adapter cables from V.A.G 1594 to detached connector.
      The LED must flash

LED flashes:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Check camshaft adjustment:

=> Repair group 15; Servicing valve gear; Checking camshaft adjustment.

LED does not flash:

• ‒ Switch off ignition.
• ‒ Remove battery.
• ‒ → Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.

• ‒ → Check wiring of valve -1- for open circuit between test box socket 114 + contact 2 of 2-pin connector using current flow diagram
      Wire resistance: max. 1.5 ω
• ‒ Additionally check wire for short to battery positive and earth.
      Specification: ∞ω
• ‒ Check wire for open circuit between contact 1 of 2-pin connector and fuel pump relay (J17) using current flow diagram.
      Wire resistance: max. 1.5 ω

If no wiring fault is detected:

• ‒ Renew engine control unit => Page 24-150.
• ‒ 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.

Actuating exhaust camshaft control valve 1 (N318):

• ‒ Press ⇒key.

• The solenoid valve for the exhaust camshaft adjustment will be actuated until the next final control is actuated by pressing ⇒ key.

Note:

Only valve -2- is actuated (barely audible) during this final control diagnosis.

If a fault is suspected:

• ‒ → Pull 2-pin connector -2- off valve.

• ‒ → Connect diode test lamp V.A.G 1527 using adapter cables from V.A.G 1594 to detached connector.
      The LED must flash

LED flashes:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Check camshaft adjustment:

=> Repair group 15; Servicing valve gear; Checking camshaft adjustment.

LED does not flash:

• ‒ Switch off ignition.
• ‒ Remove battery.
• ‒ → Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.

• ‒ → Check wiring of valve -2- for open circuit between test box socket 115 + contact 2 of 2-pin connector using current flow diagram
      Wire resistance: max. 1.5 ω
• ‒ Additionally check wire for short to battery positive and earth.
      Specification: ∞ω
• ‒ Check wire for open circuit between contact 1 of 2-pin connector and fuel pump relay (J17) using current flow diagram.
      Wire resistance: max. 1.5 ω

If no wiring fault is detected:

• ‒ Renew engine control unit => Page 24-150.
• ‒ 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.

Activate injectors (N30...N84):

• ‒ Press ⇒key.

• ‒ Press the ⇒key again so that the injector is actuated five times.

To actuate injectors of cylinders 2...6, proceed for each as you did for injector 1.

Skipping particular tests is not possible, but you can abort the final control diagnosis with the C key.

If one or more injectors do not click:

• ‒ Press the C key to abort the final control diagnosis.

• ‒ Switch off ignition.
• ‒ Check the respective injector .

Note:

After completion of the final control diagnosis, switch off ignition. If the ignition is not switched off before attempting to start, the engine will not run, as the injectors will not be activated.

• ‒ 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.