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4-Cyl. Injection Engine (2 valves, roller rocket finger), Mechanics > < Test operation

Leon Mk2

Test resistance and cables
Test resistance and cables
   
–  Remove the connector -arrow- from the wiring that goes to pinking sensor 1 -G61-.
  N28-0149
–  Measure the resistance between pinking sensor contacts 1 + 2, 1 + 3 and 2 + 3. Theoretical value: ∞ Ω
  N28-0150
–  Attach the test box -V.A.G. 1598/22- to the control unit cabling harness.
  N24-0709
–  Using the wiring diagram, check for a break in the cables between the test box and the triple connector. Contacts 1 + female socket 68 Contacts 2 + female socket 67 Contacts 3 + female socket 67 Cable resistance: 1.5 Ω max.
–  Also test the cables for a short circuit between each other. Theoretical value: ∞ Ω
If no fault is detected in the cables:
–  Loosen the pinking sensor and tighten it again to a torque of 20 Nm.
–  Carry out a road test.
The following service conditions must be met during this run:
t  Coolant liquid temperature must rise above 80 °C.
t  Once the temperature is reached, the load states must be attained several times idle partial load full load deceleration
t  At full load, the engine speed must be increased to more than 3,500/min.
–  Consult the control unit's fault memory again.
If the fault persists:
–  Renew the pinking sensor -G61- → Item.
  N28-0153

4-Cyl. Injection Engine (2 valves, roller rocket finger), Mechanics > < Test operation