Introduction

General Instructions/Safety Instructions
The following points must be observed during vehicle diagnosis:
- After the battery is connected, volatile memories must be reprogrammed. In the case of radio coding and tuning, the customer must be informed of decoding and the deleted tuner memory.
- After troubleshooting or repairs, erase the fault memory with the Porsche System Tester II No. 9588 and carry out a test drive.
- After the test drive, read out the fault memory with the Porsche System Tester II No. 9588 again.

DANGER:
Danger of injury through triggering of driver's airbag
- Never bang the Porsche System Tester II No. 9588 over the steering wheel.

CAUTION:
Danger of damage due to improper handling of the battery and the control unit connectors.
- Never disconnect battery with engine running.
- Never start engine without securely connected battery.
- Never pull off or push on plug connections of the control units or other electronic components when the ignition is switched on.

General Information On The Fault Memory

Fault Code setting conditions
Fault Codes can be set in several circumstances, e.g.:
- battery disconnected
- plug connections disconnected
- power failure

In these circumstances, no fault is present in the system and the fault memory must be erased.

Fault memory Info key F8
In order to be able to assess the fault exactly, the fault memory Info key F8 must be pressed. This information should be saved using the Save key F4 and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.

Open circuit - short to ground/voltage short/version; vehicle parameters/counter
Below short to ground limit value: There is (present) or was (not present) a short circuit to ground or an open circuit in the circuit to the control unit terminal.
Short circuit to B+: There is (present) or was (not present) a short circuit to voltage.
Checking Renewed check of fault memory - information after the ignition is switched off and subsequently switched on again. If the fault memory has been remedied, the text changes from "present" to not "present".
Total mileage Kilometer reading under which the fault has been saved
Vehicle speed The value indicates the vehicle speed at the time the fault occurred.
Version/vehicle parameters: Incorrect vehicle coding or coding not yet carried out.
Counter: When a fault first occurs, a fault entry is made in the fault memory and the counter is simultaneously set to 50. If a fault is present, the counter is incremented by 1 for each "ignition on". The maximum count is 100. The counter is decremented if the fault is no longer present. The fault memory is erased automatically when the counter reaches 0.

Vehicle hand-over
The instrument cluster is converted into delivery mode (low-current mode) in production. As is known from other systems (alarm system, PCM, roll-over bar), the instrument cluster must be activated with the Porsche System Tester II No. 9588.
1. Connect the Porsche System Tester II No. 9588 and switch on the ignition.
2. Select menu item "Special functions" and press the key >>.
3. Follow the instructions of the Porsche System Tester II No.9588.