Cars 638.0/1/2 since 13.10.1997.
Removal
1. Disconnect the negative cable from the battery.
2. Remove the heater.
3. Remove control unit 1 (see figure 10.4).
Figure 10.4. Ignition sensor (cars 638.0/1/2 since 13.10.1997.):
1. Control unit,
2. Lid,
3. Wiring connector,
4. Ignition sensor.
4. Remove cover 2.
5. Disconnect the wire from the ignition sensor 4 with connector 3.
6. Unscrew the ignition sensor 4.
Installation
7. Installation is carried out in the reverse order of removal.