The purpose of the Power Supply System is to safely deliver the required voltage and amperage to vehicle systems. The power supply system includes vehicle ground points and fuses. The power supply system includes the following components
- Battery
- Monitored Battery B+ Cable (New System)
- Fuse Box
- Fuses
- Ground Points
- Alternator
- Jumper Cable Point
Scheme 36
Battery
The Battery is located in the luggage compartment right hand side. Battery power is split with one leg routed through a 250 amp fuse to the main fuse box behind the glove box. The other circuit is sent through the BST and to the new monitored B+ cable that supplies power to the starter and alternator.
Scheme 37
Depending on equipment on the vehicle either a 50AH, 70AH or 80AH battery is installed.
Scheme 38
Monitored B+ Cable
The Monitored B+ Cable is a multistrand aluminum cable with a cross section of 80mm 2 . The aluminum cable is sheathed with an insulating layer and surrounded by a detecting shielded cable. An outer insulating sheath covers the entire assembly.
Scheme 39
Scheme 40
Scheme 41
The Monitored B+ cable is routed underneath the vehicle from the battery box along the floor pan to the engine compartment jumper cable point. The B+ cable is attached to the underside of the body with two different style clips. The cable is protected with plastic shielding. (Description of cable monitoring is found in Safety Systems.)
Scheme 42
Fuse Box and Fuses
The Fuse Box is located behind the glove box and accessible by removing the glove box door and underdash panel. The fuse box contains blade type fuse and special fuses for higher amperage consumers. Relays are located on both the front and back sides of the fuse box.
Scheme 43
Scheme 44
Alternator
Depending on country and equipment the vehicle is equipped with different output alternators.
Battery charging voltage varies according to ambient temperature. At lower temperatures, the battery is less susceptible to boiling over and can be charged at higher voltages. At high temperature the charging voltage is reduced to prevent loss of the battery electrolyte through evaporation.
The DME controls the output rate of the alternator.
Scheme 45
Jumper Cable Point
The Jumper Cable Point is located in the engine compartment on the left side at the firewall. The jumper cable point is the junction for the Monitored B+ cable and the alternator and starter.
Scheme 46
Scheme 47
Bus Systems
The bus system of the E85 is based on the K-Bus, PT CAN and the D-Bus of the E46. The byteflight optical bused system is based on the E65.
