12 51 306 Removing and installing the wiring harness - section for the supply unit module (B48, B46)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .

Necessary preliminary tasks:

Remove BATTERY
Remove the left COWL PANEL COVER

Removal:

Release screw (1).

Fig 1: Control Unit Screw

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Remove equipment holder (1) from the battery plate in direction of arrow and slightly pull it to the front.

Fig 2: Removing Equipment Holder From Battery Plate

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Unclip and remove cover (1).

Fig 3: Control Unit Cover

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Unlock and disconnect all connectors (1) on control unit.

Fig 4: Control Unit Connectors

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Remove partition wall (1).

Fig 5: Partition Wall

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Unlock and pull off all connectors (2) from power distribution box (1).

Fig 6: Power Distribution Box And Connectors

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Overview of supply module wiring harness section:

Fig 7: Overview Of Supply Module Wiring Harness Section

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Unlock and disconnect following connectors and lines	Note
Unlock and disconnect connector from DME control unit
Unlock and pull off the connector from supply unit
Release grounding cable on engine block	Tightening torque 12 52 5AZ .

Release wiring harness from clips and retainers.

Feed out wiring harness and remove.

Installation:

Route and install wiring harness.

Plug in all connectors as specified in table.

All connectors must audibly engage.

Plug in all connectors (2) to the power distribution box (1).

All connectors must audibly engage.

Fig 8: Power Distribution Box And Connectors

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Connect all connectors (1) to control unit.

All connectors (1) must engage audibly.

Installation note:

Connect connectors from front to rear.

Fig 9: Control Unit Connectors

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Insert equipment holder (1) into rear section of battery plate (2) in direction of arrow.

Fig 10: Inserting Equipment Holder Into Rear Section Of Battery Plate

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Tighten screw (1).

Tightening torque 12 90 1AZ .

Fig 11: Control Unit Screw

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Install cover (1).

Fig 12: Control Unit Cover

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Install partition wall (1).

Fig 13: Partition Wall

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