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VW 150-5 Workshop Manual - Zanshin

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Output on<br />

V.A.G 1552/VAS 5052<br />

17655 P1247<br />

Needle lift sender -G80<br />

Short to positive<br />

17656 P1248<br />

Commencement of<br />

injection control<br />

Control difference<br />

Possible Cause(s) of<br />

Fault(s)<br />

♦ G80 defective<br />

♦ Break in wiring or short<br />

circuit<br />

♦ Commencement of injection<br />

valve (N108) defective<br />

♦ Needle lift sender (G80)<br />

defective<br />

♦ Fuel tank empty<br />

♦ Fuel supply not OK, fuel<br />

shortage<br />

♦ Point of injection not OK<br />

Possible effects<br />

♦ Glow plug warning lamp<br />

flashes<br />

♦ Engine runs roughly<br />

♦ Reduced power<br />

♦ Increased emissions<br />

♦ Glow plug warning lamp<br />

flashes<br />

♦ Engine runs roughly<br />

♦ Reduced power<br />

♦ Increased emissions<br />

♦ Poor cold starting<br />

behaviour<br />

Remedying the Fault<br />

- Check G80 ⇒ page 23-76<br />

- Check N108<br />

⇒ page 01-33, Final<br />

control diagnosis<br />

- Check G80<br />

⇒ page 23-76<br />

- Fuel filter or fuel line<br />

clogged<br />

- Check and adjust commencement<br />

of injection<br />

⇒ page 23-31<br />

01-21

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