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VW Technology Explained (html)
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Wiring diagram explanation (PDF)
Wiring diagram (PDF)
1
Battery, Starter, generator
2
Starting interlock, battery
3
Ignition / starter switch
4
Ignition system, motronic engine control module (ECM), throttle valve control module
5
Motronic engine control (ECM), engine speed (RPM) sensor, knock sensor (ks)
6
ECM, camshaft position (CMP) sensor, engine coolant temp (ECT) sensor intake air temp (IAT) sensor
7
ECM, mass air flow (MAF) sensor, heated oxygen sensors (HO2S)
8
ECM, oxygen sensors, valve for camshaft adjustment
9
ECM, secondary air injection (AIR) system, on board diagnostic (OBD)
10
ECM, fuel injectors, fuel pump (FP) relay
11
Diagnosis pump for fuel system, evaporative emission (EVAP), intake manifold change-over valve
12
Oil pressure switch, fuel pump (FP), sender for fuel gauge, speedometer vehicle speed sensor
13
Instrument cluster, engine coolant temperature (ECT) gauge, low fuel level warning light, oil pressure warning light, exhaust warning light
14
Instrument cluster, multi-function indicator (MFI), multi-function indicator switches, speedometer, outside air temp sensor