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Fault code 0910: Diagnosis/troubleshooting

NOTE:
  • Before replacing the control module, the ground connections, power supply and plug connections on the control module must be checked.
  • When replacing the vehicle electrical system control module, observe the coding of the control module.
  • After the test drive, read out the fault memory with the Porsche System Tester II No. 9588 again. Additional causes of faults that could damage the vehicle electrical system control module should be detected and remedied.
DIAGNOSIS/TROUBLESHOOTING CHART

Work instruction Display OK If not OK
1 Check line for short circuit to B+:
  • Switch off the ignition.
  • Disconnect plug 'J' on vehicle electrical system control module.
  • Disconnecting hazard warning light switch plug.
  • Measure voltage between vehicle electric system plug 'J' 'Pin 4' and ground.
 < 0.3 V
Go to Step 2		 Repair / replace wiring harness
→ End
2 Check line for short circuit to ground:
  • Switch off the ignition.
  • Measure resistance between vehicle electric system plug 'J' 'Pin 4' and ground.
 ∞ Ω
Go to Step 3		 Repair / replace wiring harness
→ End
3 Check line for open circuit:
  • Measure resistance between vehicle electric system plug 'J' 'Pin 4' and hazard warning light switch plug 'Pin 6'.
 < 5 Ω
Go to Step 4		 Repair / replace wiring harness
→ End
4 Replace hazard warning light switch, then:
  • Clear fault memory.
  • Satisfy diagnostic conditions.
  • Read out fault memory again
 Fault code 09 10 is not entered
→ End		 Fault code 0910 is entered again
Go to Step 5
5 Replace vehicle electrical system control module
  • Observe note
 → End
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