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Test the wiring to the control unit > < Test process

Leon Mk2

Test the resistances of the injector-pump valves
Test the resistances of the injector-pump valves
–  Detach the connector from the injector-pump unit at the cylinder head side Location of components, → Chapter
   
–  Test the resistance of the injector-pump valves between the connector contacts cyl. 1: contact 6 + 3 cyl. 2: contact 6 +5 cyl. 3: contact 6 + 2 Target value: approx. 0.5 Ω
–  Also test the wiring for short circuits between wires or vehicle earth. Target value: ∞ Ω
If the target value is reached:
–  Following the wiring diagram, test the wiring to the control unit → Anchor.
If the target value is not reached:
–  Remove the upper toothed belt shield and the cylinder head cover.
–  Lever the connectors out from the 3 injector-pump units with a screwdriver. To avoid bending, support the opposite side of the connector with your finger.
–  Test the resistance of the injector-pump valves between the injector-pump valve contacts Target value: approx. 0.5 Ω
If the target value is not reached:
–  Replace the faulty injector-pump unit → Chapter
If the target value is reached:
  N23-0347
–  Test for open circuits in the wiring from the injector-pump unit connector to the 3 connectors (contact 2). cyl. 1: contact 2 (grey) + contact 3 cyl. 2: contact 2 (red) + contact 5 cyl. 3: contact 2 (yellow) + contact 2 Wiring resistance: 1.5 Ω max.
–  Test for open circuits in the wiring from the injector-pump unit connector to the 3 connectors (contact 1). Contact 1 (brown) + contact 6 Wiring resistance: 1.5 Ω max.
–  Also test the wiring for short circuits between wires. Target value: ∞ Ω
  N23-0347

Test the wiring to the control unit > < Test process