A4 Sedan V6-2.8L (AFC) (1996)
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Connect VAG 1598/19 test box to ECM.
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Check following wiring connections for continuity.
Sensor -G172- connector
VAG 1598/19 test box
terminal number
socket number
1
C2
3
CB
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If necessary, eliminate open or short in wiring.
If wiring is OK and there is not at least 5 volts at the sensor harness connector:
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Replace ECM.
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Check wiring for continuity between harness connector and ECM.
Sensor -G112- connector
VAG 1598/19 test-box
terminal number
socket number
2
B16
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If necessary, eliminate open or short in wiring.
If wiring is OK:
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Replace sensor for EVAP canister -G172-.