
MA1-RR-AS-(HRR-MA1)-EN maestro.idatalink.comAutomotive Data Solutions Inc. © 2023 3
MAZDA 3 WITHOUT TOUCHSCREEN 20142018
STEP 1
Remove the factory radio
If using head unit adapter (sold separately), connect HRR-
MA1 harness to adapter and skip to step 2.
• Unbox the aftermarket radio and locate its main harness.
• Cut and remove the black 20 pin connector from the HRR-
MA1 T-harness and connect the wires, shown in the wiring
diagram, from aftermarket radio main harness to the HRR-
MA1 T-harness and match the wire functions.
Note: only connect purple/white wire to radio reverse input
or module damage will occur.
• Connect the blue POWER ANT terminal to amplified
antenna adapter (if required).
STEP 2
• Determine if the vehicle has a factory amplifier. Look for
badges on the radio, door panels and dash that indicate the
presence of an amplifier (ex: BOSE).
If the vehicle DOES NOT have a factory amplifier:
• Leave the HRR-MA1 4-pin white and 4-pin black
connectors together. The included 4-pin white and black
connectors with RCAs are not used .
If the vehicle DOES have a factory amplifier:
• Unlug the HRR-MA1 4-pin white and 4-pin black
connectors.
• Connect the HRR-MA1 4-pin white to 4-pin white connector
with RCAs. Connect the 4-pin black to 4-pin black
connector with RCAs.
• Connect the RCAs to the radio outputs: white/left front,
gray/right front, green/left rear, purple/right rear.
STEP 3
• If equipped with backup camera, plug the white MA1 4-pin
cable to the vehicle backup camera harness. Connect the
2-pin white connector to HRR-MA1 main harness 2-pin
white connector.
• Connect the factory radio harness to the HRR-MA1
T-harness.
• The blue 2-pin connector is not used.
STEP 4
• Plug the HRR-MA1 red connector to the green 2-pin
connector.
• Cut and isolate the blue/red wire near the 24-pin
connector. Connect the other end of the blue/red wire to
PIN-F of the 28-pin Bluetooth module connector (refer to
wiring diagram for details).
STEP 5
• Plug the BLACK 2-pin connector of your HRR-MA1
T-harness into the OBDII MA1 cable.
• Plug the OBDII connector into the OBDII of the vehicle.
STEP 6
• Plug the harnesses into the aftermarket radio.
• Connect the backup cam cable into the aftermarket radio
(if equipped).
• Plug the antenna adapter (if required).
• Connect the steering wheel control cable to the
aftermarket radio. Connect either the blue/yellow wire
(Kenwood/JVC or radios with SWI/KEY wires) or the 3.5mm
to the steering control input of the radio (see Radio Wire
Reference Chart for more details).
STEP 7
• Connect all the harnesses to the Maestro RR module then
test your installation.
CLOCK ADJUST:
• Press brake 5 times, holding ON at the 5th press.
• Depress parking brake.
Clock will begin to flash. Use steering wheel controls to set
time/clock format:
• Press volume up for hour adjust.
• Press volume down for minute adjust.
• To adjust 12/24 hour display, use SEEK UP or SEEK DOWN.
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INSTALLATION INSTRUCTIONS P1 /1