SEAT Workshop Service and Repair Manuals

Function

The camshaft adjustment is dependant upon load and speed. Oil pressure is directed to the camshaft adjuster (mechanical adjustment unit) by the camshaft adjustment solenoid valve, and the camshaft adjuster then changes the valve timing.

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

• ◆ V.A.G 1551 Fault reader

Note:

The vehicle system tester V.A.G 1552 can be used instead of the fault reader V.A.G 1551, however a print-out is not possible.

• ◆ V.A.G 1551/3 Cable

Test conditions

• ● → The fuses must be OK.
• ● The battery voltage must be at least 11.5 V.
• ● All electrical consumers, e.g. lights and rear window heating must be switched off.
• ● Engine oil level OK, checking , Fig. 2
• ● No faults must be stored in fault memory

=> Repair group 01; Fault memory; Interrogating and erasing fault memory of engine control unit

• ● Coolant temperature must be at least 80...95°C, =>Display group 01, display zone 2.

Checking activation

• ‒ Via final control diagnosis, first check activation of camshaft adjustment valve -1-, inlet (N205) and of exhaust camshaft control valve -1- (N318):

=> Repair group 01; Final control diagnosis; Performing final control diagnosis

If activation is OK:

• ‒ Check position of camshafts relative to crankshaft => Page 15-80.

Test sequence

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select engine control unit with "Address word" 01. Connecting fault reader and selecting engine control unit:

=> Repair group 01; Self-diagnosis general: Connecting fault reader V.A.G 1551 and selecting engine electronics control unit.

• ‒ 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.

Only continue with the test when

• ● The coolant temperature is 80...95 °C
  in -display zone 2-

Checking position of camshaft relative to crankshaft

• ‒ Change to display group 208 as follows:
• ‒ Press C key.

• ‒ Press keys 2, 0 and 8 for "Display group number 208" and confirm entry with Q key.

• ‒ Depress brake pedal and hold.
• ‒ Press accelerator pedal to wide-open position.

• The engine speed is increased by the control unit to
      approx. 2 300 rpm.

If the specifications are not obtained:

• ‒ Press ⇒key.
• ‒ Interrogate fault memory:

=> Repair group 01; Fault memory; Interrogating and erasing fault memory of engine control unit

• ‒ Read out the readiness code:

=> Repair group 01; Readiness code; Reading out readiness code

• ‒ If the fault memory has been erased or the engine control unit separated from the permanent positive, the readiness code must be generated again.

=> Repair group 01; Readiness code; Generating readiness code

If no fault is stored in fault memory:

• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.
• ‒ Check valve timing => Page 15-33.

If the specification is attained:

• ‒ Change to display group 209 as follows:
      V.A.G 1551: Press key 3
      V.A.G 1552: Press key ↑

• ‒ Depress brake pedal and hold.
• ‒ Press accelerator pedal to wide-open position.

• The engine speed is increased by the control unit to
      approx. 2 300 rpm.

If the specifications are not obtained:

• ‒ Press ⇒key.
• ‒ Interrogate fault memory:

=> Repair group 01; Fault memory; Interrogating and erasing fault memory of engine control unit

• ‒ Read out the readiness code:

=> Repair group 01; Readiness code; Reading out readiness code

• ‒ If the fault memory has been erased or the engine control unit separated from the permanent positive, the readiness code must be generated again.

=> Repair group 01; Readiness code; Generating readiness code

If no fault is stored in fault memory:

• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.
• ‒ Check valve timing => Page 15-33.

If the specification is attained:

• ‒ Check camshaft adjustment
  => Page 15-84.

Checking camshaft adjustment

• ‒ Change to display group 210 as follows:
      V.A.G 1551: Press key 3
      V.A.G 1552: Press key ↑

• ‒ Depress brake pedal and hold.
• ‒ Press accelerator pedal to wide-open position.

• The engine speed is increased by the control unit to
      approx. 2 300 rpm.

Note on display zones 1 and 2:

The display values rise to about 52.0 °and then decline again to specification.

Note on display zone 4:

The specification "xxxxx100" in display zone 4 appears only after about 40 seconds.

If the specifications are not obtained:

• ‒ Press ⇒key.
• ‒ Interrogate fault memory:

=> Repair group 01; Fault memory; Interrogating and erasing fault memory of engine control unit

• ‒ Read out the readiness code:

=> Repair group 01; Readiness code; Reading out readiness code

• ‒ If the fault memory has been erased or the engine control unit separated from the permanent positive, the readiness code must be generated again.

=> Repair group 01; Readiness code; Generating readiness code

If no fault is stored in fault memory:

• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.
• ‒ Check Hall senders (G40 and G163) (connectors might be interchanged):

=> Repair group 28; Servicing ignition; Checking Hall senders

• ‒ Check oil pressure => Page 17-20, Checking oil pressure and oil pressure switch.

If no wiring fault is detected:

• ‒ Renew inlet camshaft adjuster
  => Page 15-65, Removing and installing camshafts.

If the specification is attained:

• ‒ Change to display group 211 as follows:
      V.A.G 1551: Press key 3
      V.A.G 1552: Press key ↑

• ‒ Depress brake pedal and hold.
• ‒ Press accelerator pedal to wide-open position.

• The engine speed is increased by the control unit to
      approx. 2 300 rpm.

Note on display zones 1 and 2:

The displayed values rise to about 22.0 °CA and then decline again to specification.

Note on display zone 4:

The specification "xxxxx100" in display zone 4 appears only after about 40 seconds.

If the specifications are not obtained:

• ‒ Press ⇒key.
• ‒ Interrogate fault memory:

=> Repair group 01; Fault memory; Interrogating and erasing fault memory of engine control unit

• ‒ Read out the readiness code:

=> Repair group 01; Readiness code; Reading out readiness code

• ‒ If the fault memory has been erased or the engine control unit separated from the permanent positive, the readiness code must be generated again.

=> Repair group 01; Readiness code; Generating readiness code

If no fault is stored in fault memory:

• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.
• ‒ Check Hall senders (G40 and G163) (connectors might be interchanged):

=> Repair group 28; Servicing ignition; Checking Hall senders

• ‒ Check oil pressure => Page 17-20, Checking oil pressure and oil pressure switch.

If no wiring fault is detected:

• ‒ Renew exhaust camshaft adjuster
  => Page 15-65, Removing and installing camshafts

If the specification is attained:

• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.