Scheme 152
Connecting and disconnecting control modules
Always switch off the ignition before connecting and disconnecting control modules, connectors and the breakout box.
The ignition must be switched off when taking readings with an ohmmeter.
Scheme 153
Temperature
The control modules must not be heated to above 80 °C. Remove control modules when storing for example.
Arc welding
Always disconnect the battery negative lead to prevent a short-circuit.
Position the welding ground as close to the welding site as possible, otherwise different ground potentials may be generated in different components.
When welding close to an electronic module, the unit must be removed to avoid heat damage.
Replacement
Do not replace a control module without checking its wiring and components. Otherwise the new component may be damaged in the same way as the old one.