Touareg V8-4.2L (BHX) (2004)
Specified value: at least 11.0 V
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Switch ignition off.
If specified value is not obtained:
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Check voltage supply at 6-pin connector terminal 3 to Motronic Engine Control Module (ECM) Power Supply Relay (J271) according to wiring
diagram:
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Erase DTC memory of Engine Control Module (ECM) , Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code.
If specified value is obtained:
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Check Ground (GND) activation of the respective oxygen sensor heater.
Checking Ground (GND) activation of oxygen sensor heating
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Connect test box to control module wiring harness , connect test box for wiring test.
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Check wires between test box and 6-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.
Wire resistance: max. 1.5ohms