Alpine i407-WRA-JL Installation Manual page 22

Troubleshooting Guide Continued
Only the front speakers are on
9
for SXM Radio.
iPhone or Android phone is
not recognized
when connected to the
10
USB cable, causing CarPlay
or Android Auto to not
function.
Rear camera not
11 automatically coming on
when vehicle is in reverse.
Rear camera just shows blank
12
image with guide cones.
Front camera image is
13
reversed.
Installed an amplifier and it
14
only gets sound on FM.
Can't be heard when making
15
phone calls.
16 OEM USB's not charging.
SXM Tuner has not been activated.
Loose or disconnected USB cable.
Non-compatible cable.
Wrong USB port used.
The rear camera was not turned on
in the setup menu.
The rear camera is not outputting
an image.
A front camera was not used.
The power antenna wire was used
instead of the remote wire.
The microphone is not plugged into
the correct port.
The wrong micro USB was plugged
into the USB power adapter.
i407-WRA-JL 20210330v1
Activate SXM Tuner.
Check the USB connection behind
the headunit.
Use the cable supplied with the
iPhone or Android phone and only plug into
the extension provided with the head unit.
Third party adapters like flush mount, OEM
integration, and/or long extensions may not
work. Only use USB extension that came
with the head unit.
The OEM USB's are only meant for charging.
They can't transfer data. The only one that
can is the bottom port of the USB, AUX,
HDMI interface that is included.
Refer to Step 4 of the Set Up Guide on page
20.
Refer to page 15 and ensure all the
connections are made exactly as shown and
the dip switches are in the correct positions.
A known good RCA source can be used into
the head unit to let you know if the head
unit is receiving the video signal and let you
know if it's a connection on the camera side
or going to the head unit.
A rear camera can not be used for the front
of the vehicle. It will not display the image
correctly and it will be reversed.
The remote wire is what needs to be
connected to the remote turn on lead of the
amplifier.
The microphone needs to be plugged into
the port labeled "MIC". If it gets plugged into
the SWC port it will not function properly.
Page 14 shows the correct port to plug into.
There are 2 factory micro USB plugs in
the dash behind the media center. One
is black and one is grey. If the supplied
adaptor is plugged into the grey micro
USB the factory USB's will not charge.
Make sure the black USB is plugged into
the power adapter.
Jeep Wrangler
˜ 22/22
See page 11 for details.