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Fault code 0887: 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 Read out fault memory with the Porsche System Tester II No. 9588, then:
  • Clear fault memory.
  • Satisfy diagnostic conditions.
  • Read out fault memory again
 Fault code 0887 is no longer entered
→ End		 Fault code 0887 is re-entered
Go to Step 2
2 Check line for short circuit to B+:
  • Switch off the ignition.
  • Pull out plug 'A' on vehicle electrical system control module:
  • Disconnecting hazard warning light switch plug.
  • Switch on ignition.
  • Measure voltage between vehicle electric system 'Plug A Pin 3' and ground.
 < 0.3 V
Go to Step 3		 Repair / replace wiring harness
→ End
3 Check line for short circuit to ground:
  • Switch off the ignition.
  • Measure resistance between vehicle electric system plug 'A' 'Pin 3' and ground.
 ∞ Ω
Go to Step 4		 Repair / replace wiring harness
→ End
4 Check line for open circuit:
  • Measure resistance between vehicle electric system plug 'A' 'Pin 3' and hazard warning light switch plug 'Pin 3'.
 < 5 Ω
Go to Step 5		 Repair / replace wiring harness
→ End
5 Replace vehicle electrical system control module
  • Observe note
 → End
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