Passat Wagon L4-2.0L (ABA) (1995)
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Wire resistance: Max. 1.5 Ohms
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Check wires at 3-pin connector for shorts to one another.
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Terminal 1 and test box socket 33
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Specification: Infinity Ohms (no continuity)
If no wiring malfunction is detected:
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Replace Motronic ECM J220
Checking wiring
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Connect VAG 1598/18 test box to ECM wiring harness.
If the display shows constant 0 <°:
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Check wire for short circuit to ground.
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test box sockets 1 and 40
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Specification: Infinity Ohms (no continuity)
If the display shows constant 106 <°:
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Switch ignition on.
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Check wire for short circuit to positive.
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Connect multimeter to measure voltage at test box sockets 1 and 40
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Specification: 0 volts
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Switch ignition off
Continuation if voltage is present:
If voltage of about 5 volts was present:
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Separate 3-pin connector to throttle position sensor.
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Switch ignition on.
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Check wiring at 3-pin connector terminals 1 and 2 for short circuit to one another according to wiring diagram.
Specification: Infinity Ohms
If the voltage was approx. battery positive voltage (B+):
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Check wire at 3-pin connector terminal 1 for short circuit to B+ according to wiring diagram.
Continuation if no voltage is present:
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Separate 3-pin connector to throttle position sensor.