974519 Removing and installing wire harness for battery wiring
WM 974519 Removing and installing wire harness for battery wiring
Information
Component information
Installation position of wire harness for battery wiring
General warning notes
Group 20 - Fuel supply, control
WARNING
Toxic substances
- Danger of poisoning or suffocation
-> Ventilate the work area well.
-> Never ingest or inhale.
-> Read specific information on the Hazard Sheet.
-> Wear personal protective gear.
WARNING
Highly inflammable or explosive materials
- Danger of fire or explosion
-> Avoid contact with hot parts or sources of ignition.
-> Use suction to remove ignitable vapours.
-> Attach warning sign in a clearly visible position.
Information
- Absorb any escaping fuel using a suitable binding material or a cloth.
- Cloths which have absorbed fuel must be disposed of according to the applicable national laws.
- The fuel system must be depressurised before starting work on it.
- Only work on the fuel system in well-ventilated rooms.
- Any seals which have been removed must always be replaced.
- Do not use any sealant containing silicone or silicone spray when the injection system is open. Traces of silicone drawn in by the engine are not combusted and damage the oxygen sensors.
Preliminary work
Preliminary work for wire harness from battery to power distributor (HSB)
1. Disconnect the battery. -> 270619 Removing and installing battery - section on "Removing" 270619 Removing and Installing Battery
Preliminary work for wire harness from power distributor (HSB) to B+ connection point in engine compartment
Information
- For details of how to drain the fuel tank, see -> 2010EN Draining and filling the fuel tank Procedures
1. Disconnect the battery. -> 2X00IN Work instructions after disconnecting the battery - section on "Disconnecting" 2X00IN Work instructions after disconnecting the battery
2. Remove rear cardan shaft. -> 393519 Removing and installing rear cardan shaft - section on "Removing" Service and Repair
3. Remove rear section of left front wheel-housing trim panel. -> 505619 Removing and installing front wheel housing liner - section on "Removing" Service and Repair
4. Remove centre section of luggage compartment trim panel. -> 70061900 Removing and installing centre luggage compartment trim panel (luggage compartment cover) - section on "Removing"
5. Remove rear right wheel-housing trim panel. -> 536919 Removing and installing rear wheel housing liner - section on "Removing" Service and Repair
6. Unscrew fastening screw -1- for tank filler neck -2- at the body.
Loosening tank filler neck screw
7. Drain the fuel tank fully (both sides). -> 2010EN Draining and filling the fuel tank (draining and filling in fuel) - section on "Draining" Procedures
NOTICE
Incorrect handling of fuel tank
- Danger of cracking or damaging the fuel tank if handling instructions are not observed.
-> Drain the fuel tank fully before lowering it.
8. Remove restraining straps at the middle, left and right of the fuel tank and lower the fuel tank. Leave the fuel tank on the vehicle! -> 201019 Removing and installing fuel tank - section on "Removing" Removal and Replacement
9. Unclip fuel line -1- and fuel vent line -2- on the underbody at the right of the fuel tank.
Unclipping fuel line
Removing wire harness from battery to power distributor (HSB)
1. Disconnect B+ line at the cutoff relay. -> 974619 Removing and installing cutoff relay - section on "Removing" Service and Repair
Disconnecting B+ line at the power distributor (HSB)
Removing wire harness from power distributor (HSB) to B+ connection point in engine compartment
Information
Due to the large number of fixing clips, fixing clips will only be shown and mentioned symbolically.
The new B+ line to be installed comes fitted with cable clips.
1. Disconnect the B+ line in the power distributor (HSB). -> 978919 Removing and installing power distributor (HSB) - section on "Removing" 978919 Removing and installing power distributor (HSB)
2. Unclip B+ line in the luggage compartment area.
3. Pull B+ line through under the transverse cover.
Unclip transverse cover -2- and lift it up -arrow A-.
Pull B+ line -1- through under the transverse cover.
Pulling B+ line out of transverse cover
4. Press in rubber sleeve -1- ( -arrow- ) and pull B+ line out of the luggage compartment from under the vehicle.
Pulling B+ line out of luggage compartment
5. Unclip B+ line close to the fuel tank.
Unclipping B+ line near the fuel tank
6. Unclip B+ line in the underbody area.
Unclipping B+ line on the underbody
7. Unclip B+ line close to the front left wheel housing.
Unclipping B+ line at the wheel housing
8. Disconnect connections at the B+ connection point in the engine compartment.
Disconnecting B+ line connection in engine compartment
8.1. Unscrew nuts -1- and remove them -arrow A-.
8.2. Remove connection for generator/starter -2-.
8.3. Remove connection for fan blower -3-.
8.4. Unclip printed circuit board (PCB) -4- and remove it -arrow B-.
9. Unscrew fastening screw for B+ connection point in the engine compartment -1-.
Disconnecting B+ connection point in engine compartment
10. Unclip B+ line -arrow A- and remove it -arrow B-.
Unclipping B+ line from B+ connection point in engine compartment
11. Pull B+ line out of the engine compartment into the wheel housing and set it down.
Pulling B+ line into wheel housing
Installing wire harness from battery to power distributor (HSB)
1. Screw in B+ line on the cutoff relay. -> 974619 Removing and installing cutoff relay - section on "Installing" Service and Repair
B+ line on power distributor (HSB)
Installing wire harness from power distributor (HSB) to B+ connection point in engine compartment
1. Bring B+ line from the wheel housing into the engine compartment, position it and clip it on.
B+ from wheel housing into engine compartment
2. Press B+ line into the bracket for the B+ connection point in the engine compartment -arrow A- until the catch -arrow B- engages with an audible click.
Engaging B+ line in B+ bracket
Screw in fastening screw for B+ connection point in the engine compartment -1-.
Screwing on B+ connection point in engine compartment
3. Screw in connections at the B+ connection point in the engine compartment.
Screwing on B+ line connection in engine compartment
3.1. Clip in PCB -4- until it engages securely -arrow A-.
3.2. Fit connection for fan blower -3-.
3.3. Fit connection for generator/starter -2-.
3.4. Screw on nuts -arrow B-.
4. Clip in B+ line close to the left wheel housing.
Clipping in B+ line at the wheel housing
5. Clip in B+ line in the underbody area.
Clipping in B+ line on the underbody
6. Clip in B+ line close to the fuel tank.
Clipping in B+ line near the fuel tank
7. Pull B+ line from under the vehicle into the luggage compartment -arrow- and position rubber sleeve -1-.
B+ line in luggage compartment
8. Pull B+ line through under the transverse cover.
Unclip transverse cover -2- and lift it up -arrow A-.
Pull B+ line -1- through under the transverse cover -arrow B-.
B+ line under transverse strut
9. Clip in B+ line in the luggage compartment area.
10. Screw B+ line into the power distributor (HSB). -> 978919 Removing and installing power distributor (HSB) - section on "Installing" 978919 Removing and installing power distributor (HSB)
Subsequent work
Subsequent work for wire harness from power distributor (HSB) to B+ connection point in engine compartment
1. Clip in fuel line -1- and fuel vent line -2- on the underbody at the right of the fuel tank -arrow-.
Clipping in fuel line
2. Lift up the fuel tank and fit restraining straps at the middle, left and right. -> 201019 Removing and installing fuel tank - section on "Installing" Removal and Replacement
3. Screw in fastening screw -1- for tank filler neck -2- at the body.
Screwing in tank filler neck screw
4. Install rear right wheel-housing trim panel. -> 536919 Removing and installing rear wheel housing liner - section on "Installing" Service and Repair
5. Install centre section of luggage compartment trim panel. -> 70061900 Removing and installing luggage compartment trim panel (luggage compartment cover) - section on "Installing"
6. Install rear section of left front wheel-housing trim panel. -> 505619 Removing and installing front wheel housing liner - section on "Installing" Service and Repair
7. Install rear cardan shaft. -> 393519 Removing and installing rear cardan shaft - section on "Installing" Service and Repair
8. Fill the fuel tank. -> 2010EN Draining and filling the fuel tank (draining and filling in fuel) - section on "Filling" Procedures
9. Connect the battery. -> 270619 Removing and installing battery - section on "Installing" 270619 Removing and Installing Battery
Subsequent work for wire harness from battery to power distributor (HSB)
1. Connect the battery. -> 270619 Removing and installing battery - section on "Installing" 270619 Removing and Installing Battery