Introduction

Alarm system I32; 148

Introduction
This manual contains the diagnosis for the following system:
Alarm system I32; 148

General instructions/safety instructions
The following points must be observed during vehicle diagnosis:
- After the battery is connected, volatile memories must be re-programmed. In the case of radio coding and tuning, the customer must be informed of decoding and the deleted tuner memory.
- After the battery has been connected, the instructions in assembly must be observed.
- 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 again with the Porsche System Tester II No. 9588.

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 unless battery is connected securely.
- Never pull off or push on plug connections for the control modules or other electronic components when the ignition is switched on.

Special tools: 88-pin test adapter cable No. 961642-pin test adapter cable No. 9617

The two special tools 88-pin test adapter cable No. 9616 and 42-pin test adapter cable No. 9617 can be used for the measurements to be carried out on the 42-pin connector (connector A). No express reference is made in the troubleshooting section to connecting the special tools.

General information on the fault memory

Fault code setting conditions

Fault codes can be set in several circumstances, e.g.:
- When the battery is disconnected.
- When plug connections are disconnected.
- In the event of a power failure.
- etc.

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 the status "not present" and no other problems are present, then the fault memory must be erased.

Open circuit - short to ground / short to B+ /version; vehicle parameters / counter
Open circuit/short circuit to ground: There is (present) or was (not present) a short circuit to ground or an open cir-cuit in the circuit to the control module terminal.

Short circuit to B+: There is (present) or was (not present) a short circuit to voltage.