Brief description
Brief description |
• |
Engine Control Module (ECM)
|
• |
MIU (540)/SID (541)
|
• |
Generator (2)
|
• |
Battery (1)
|
• |
Column Integration Module, CIM (703a)
|
Description |
Battery
The terminal voltage of the battery is 12V and its capacity is dependent on the engine variant. The battery delivers current to the starter motor for starting the engine and supplies other power consumers with current while the engine is not running. The positive battery terminal is connected to the starter motor and to the main fuse box in the engine bay and its negative terminal is connected to the body and the engine.The battery is located on the left-hand side of the engine bay. On some variance, it is contained in a battery cover to reduce heating. An air duct takes in air via the car's grille. The air from the air duct passes through the battery cover and consequently cools down the battery.
The battery electrolyte cannot be topped up. The battery electrolyte level is indicated by an indicator point on the top of the battery. If the indicator is dark, the level is OK. On low level the indicator is light and the battery should be changed.
Generator
The task of the generator is to supply power to all consumers when the engine has started, and to charge the battery. The generator is an AC generator with integral charge control.The generator is driven by the engine via a poly-V belt from the crankshaft pulley. The engine control module determines when the generator should begin charging, which takes place when the control module receives a signal that the engine has started. If a charging fault occurs, the generator sends information on this to the engine control module. The engine control module sends the information, via the CIM to the MIU/SID which indicates that charging is not working. A diagnostic trouble code is generated in the engine control module.