Replacing Battery Positive Lead Between Starter and Alternator

Removing And Installing/replacing Battery Positive Lead (between Starter Motor And Alternator) (M54)

Necessary preliminary tasks:
- Read out fault memory of DME control unit.
- Switch off ignition.
- Disconnect negative battery lead.
Observe instructions for disconnecting and connecting battery.

- Remove suction filter housing.







Release nut and disconnect battery positive lead (2) from alternator.

Tightening torque
1AZ Wires to alternator
Terminal D+
All/others
M6 7 Nm

Terminal B+
All/others
M8 13 Nm







Unscrew nut (1).

Tightening torque
4AZ Electrical leads to starter
M5 5 Nm
M6 7 Nm
M8 13 Nm

Detach battery positive lead (2) from starter motor and remove.

NOTE: For a better overview, this work step is shown from below. Carry out removal of battery positive lead from above.

NOTE:
Interrogate fault memory of DME control unit.
Check stored fault messages.
Rectify faults.
Then clear fault memory.