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Radio Amplifier Replacement
 
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Pelican Technical Article:

Radio Amplifier Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$300

Talent:

****

Tools:

Flathead screwdriver, trim panel tool, 10mm socket

Applicable Models:

R56 MINI Cooper Hatchback (2007-11)
R56 MINI Cooper S Hatchback (2007-11)

Parts Required:

Amplifier

Hot Tip:

Disconnect battery before removing amplifier

Performance Gain:

Repair faulty amplifier

Complementary Modification:

Install aftermarket radio

Most electrical components on MINI R56 models require programming using an advanced MINI scan tool when replacing. With that said, don't feel you can't replace these items yourself. You also have the option of swapping out used items, which will at times work without programming. I don't have experience with this method, due to my access to a MINI scan tool, but it is something to consider. I have been told programming of used items isn't always required, so this may be an option, but I cannot vouch for it working 100% of the time. If you have experience with used part installation, please share your experience, as it will help the Pelican Parts community.

MINI R56 models can come equipped with two types of amplifiers, depending on options -- stereo / HiFi amplifier and Top HiFi amplifier. The sound frequency output sent to the amplifier from the radio is dependent on the speaker configuration. Only the frequency range that can be effectively reproduced by the connected speaker system. For example if high, mid and low-range speakers / woofers are connected to the amplifier, the frequencies for those components are sent.

Stereo / HiFi amplifier

HiFi amplifiers are amplifiers with active frequency gates. Active frequency gates achieve better acoustic results than passive frequency gates. The HiFi amplifier does not have speed-dependent volume adjustment or speed-dependent equalizing. The function of the HiFi amplifier is only to amplify the low-frequency output.

Top HiFi amplifier

The digital Top HiFi amplifier and the High End HiFi amplifier (AMPT) convert the digital audio signals transmitted from the radio to the MOST bus into analogue audio signals. The Top HiFi amplifier and High End hi-fi amplifier (AMPT) also receive the analogue signals from the Active Sound Design (ASD). The combined and amplified audio signals are transmitted to the speakers.

Audio System Controller (radio / M-ASK / CCC)

The Audio System Controller (ASK) is integrated in the radio / M-ASK / CCC control unit. The ASK manages all audio signals.

Amplifiers

The amplifier has four input channels and seven outputs.

The amplifier has a separate power supply. The amplifier is switched on by the RAD_ON signal from the ASK (> 8 V = ON / < 6 V = OFF). On request from the ASK, the amplifier performs speed-dependent volume adjustment. The low frequency range in particular is boosted at high driving speeds.

Remember that your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The amplifier (green arrow) is mounted in the left rear fender area, behind the carpeted trim panel.
Figure 1

The amplifier (green arrow) is mounted in the left rear fender area, behind the carpeted trim panel. The photo shows the access cover removed.

Working at the tailgate sill, unclip the cargo nets (green arrow) and remove it.
Figure 2

Working at the tailgate sill, unclip the cargo nets (green arrow) and remove it. Then remove the three plastic rivets (red arrows). To remove the plastic rivets, lever the center pin out (inset). Then remove the rivet anchor.

Lift and remove the cargo area carpet (green arrow).
Figure 3

Lift and remove the cargo area carpet (green arrow).

Next, pull the tailgate sill trim toward the front of the vehicle to detach it and pull it over the cargo net anchors (red arrow).
Figure 4

Next, pull the tailgate sill trim toward the front of the vehicle to detach it and pull it over the cargo net anchors (red arrow).

Then, lift the trim piece straight up, detaching it from the tailgate seal and remove (red arrow) it from the vehicle.
Figure 5

Then, lift the trim piece straight up, detaching it from the tailgate seal and remove (red arrow) it from the vehicle.

Working at the left inner cargo area, remove the four plastic rivets (green arrows).
Figure 6

Working at the left inner cargo area, remove the four plastic rivets (green arrows). To remove the plastic rivets, lever the center pin out (inset). Then remove the rivet anchor.

Fold the left side rear seat back forward.
Figure 7

Fold the left side rear seat back forward. Working at the carpet trim panel behind the seat, remove the two plastic rivets (green arrows). To remove the plastic rivets, lever the center pin out. Then remove the rivet anchor. Then fold the seat latch hook up (blue arrow).

Pull the carpet trim panel forward, toward the front of the vehicle.
Figure 8

Pull the carpet trim panel forward, toward the front of the vehicle. As you pull it away from the body, unplug the cargo light and 12-volt adapter (green arrows). The electrical connectors pull straight off. Then feed the seat back latch hook through the trim panel opening (blue arrow) and remove the trim panel from the vehicle.

Working at the amplifier, remove the two 10mm nuts (green arrows).
Figure 9

Working at the amplifier, remove the two 10mm nuts (green arrows).

Then at the top front corner, remove the remaining 10mm nut (green arrow).
Figure 10

Then at the top front corner, remove the remaining 10mm nut (green arrow).

Lift the amplifier up and remove enough to access the electrical connector.
Figure 11

Lift the amplifier up and remove enough to access the electrical connector. 

To disconnect the electrical connector, press the small button (green arrow) and rotate the connector lock 90&deg; to disconnect it (yellow arrow).
Figure 12

To disconnect the electrical connector, press the small button (green arrow) and rotate the connector lock 90&deg; to disconnect it (yellow arrow).

Place the amplifier on a solid working surface.
Figure 13

Place the amplifier on a solid working surface. Remove the 10mm bracket fastener (green arrow).

Slide the amplifier up to remove (green arrow) it from the mounting bracket.
Figure 14

Slide the amplifier up to remove (green arrow) it from the mounting bracket. Reverse the steps to install the new unit. If you're using a recycled amplifier, be sure the part number matches (inset). Once installed you will have to code the radio to get the new amplifier online. I have heard of folks replacing amps without coding them, however if the software level in the vehicle is higher than the replacement amp, you will have to.

If you suspect the amp in your MINI is faulty there are a few quick things you can check.
Figure 15

If you suspect the amp in your MINI is faulty there are a few quick things you can check. If the radio turns on and seems to function but you have no sound, start by checking the 15-amp fuse at the amp (red arrow). Then check power and ground to the amp. On my subject vehicle power comes in on terminal 5 (red / gray). Ground is on terminal 26 (brown). If you have power and ground and the amp does not come on, it may be faulty.

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