Polo Mk3
Servicing injection system
Checking throttle valve control part
Note: If the throttle valve control part (J338) is removed and installed or replaced the basic setting must be performed . Special tools, testers, measuring instruments and auxiliary items required
Checking idling switch
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→ Indicated on display: |
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→ Indicated on display: |
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Indicated on display: (1...4 = Display zones) |
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If the specifications are not obtained:
Continuation of check when display is always at 1 |
Display 0:
Display 1:
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If the voltage supply and wirings are OK: Continuation of check when display constantly shows 0
Display 1:
Display 0:
If the voltage supply and wirings are OK: Checking throttle valve positioner and throttle valve positioner potentiometer Test conditions
Test sequence
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→ Indicated on display: |
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→ Indicated on display: |
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Indicated on display: (1...4 = Display zones) |
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If the specification is not obtained: |
If no fault is detected:
Checking throttle valve potentiometer Test conditions
Test sequence
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→ Indicated on display: |
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→ Indicated on display: |
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→
Indicated on display: (1...4 = Display zones) |
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If the figure does not increase uniformly:
If the display constantly shows 0 <° or is above 90 <°:
Continuation of check when display 0 <°: |
Display above 90 <°:
Display 0 <°:
If the voltage supply and wirings are OK: Continuation of check when display is above 90 <°: |
Display 0 <°:
Display above 90 <°:
If the voltage supply and wirings are OK: Checking voltage supply and wiring to control unit |
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If no wiring fault is detected:
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