Fault code 2089: 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	Carry out actuator test using Porsche System Tester II No. 9588.		Hazard warning light switch functioning error See FAULT CODE 0910 → End Charging relay functioning error Go to Step 2 Level adjustment functioning error See FAULT CODE 0062 → End
2	Check line for short circuit to B+:	Switch off the ignition. Disconnect plug 'J' on vehicle electrical system control module. Remove charging relay from plug position 7' on protective case. Switch on ignition. Measure voltage between vehicle electric system plug 'J' 'Pin 9' 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 'Pin 9' 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 'J' 'Pin 9' and charging relay plug position 'Pin 1'.	< 5 Ω Go to Step 5	Repair /replace wiring harness → End
5	Check ground line (charging relay) for open circuit:	Measure resistance between charging relay plug position 'Pin 2' and ground.	5 Ω Go to Step 6	Repair /replace wiring harness → End
6	As an experiment, replace charging relay, then: Clear fault memory. Satisfy diagnostic conditions. Read out fault memory again		Fault code 2098 not entered. → End	Fault code 2098 re-entered. Go to Step 7
7	Replace vehicle electrical system control module Observe note		→ End