Passat Wagon L4-1781cc 1.8L Turbo (AEB) (1998)
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Measure resistance
- Specification: 0.0 to 19.9 Ohms
If specification not obtained:
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Replace Oxygen sensor G39 (before Three Way Catalyst).
If specification obtained:
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Switch Multimeter to "Voltage measurement" range.
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Connect Multimeter between terminals 1 + 2 of ECM harness connector using jumper wires from VW 1594 adaptor kit
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Start engine and let idle
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Measure Voltage supply
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When Display group 41, Display zone 2 shows
Display, Htg.bC.ON:
Specification: 11.0 to 14.5 Volts
Display, Htg. bC.ON/Htg. bC.OFF (alternating)
Specification: between 0.0 and 12.0 Volts fluctuating
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Switch OFF ignition.
If NO Voltage present:
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Connect VAG 1598/22 Test Box to Control Module harness connector.