Audio / BOSE & Amplifier

Issue: No sound at all

1. Confirm harness type: High trim needs the BOSE-compatible harness/decoder. Compare with the packing list. (If different, take a photo and contact us.)
2. Enable BOSE in settings: Settings → Sound / Factory → Audio Type → select BOSE / Amplified, then reboot the unit.
3. AMP-CON (amp turn-on) wire: Ensure the blue or blue/white AMP-CON/ANT lead from the head unit is connected to the vehicle amp turn-on input (12V when on ACC). Without it, the amp stays off → no sound.
4. RCA routing: If your kit uses RCA outputs for front L/R, make sure they’re connected to the harness inputs for the OEM amp. Avoid mixing RCA with high-level speaker outputs.
5. Check balance/fade: Make sure balance/fade is centered and volume limit isn’t enabled.

Issue: Distortion or only some speakers work

• Verify you are not feeding the BOSE amp with amplified (speaker-level) outputs. Use line-level RCA as required by your harness.
• Re-seat the harness blocks firmly; inspect bent pins. ([IMG: BOSE harness pinout])
• Try another Audio Type profile under Factory settings, then reboot.

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A/C & CAN Settings

Issue: A/C panel not responsive / wrong display

1. Select the correct CAN protocol: Settings → Car Model / CANBUS → choose the exact Maxima A35 High Trim profile → reboot.
2. Re-check A/C adapter connection: Make sure the dedicated A/C adapter is fully seated in the head-unit port and the vehicle plug. ([IMG: A/C adapter plug])
3. Update protocol online: Connect Wi-Fi → open Protocol Update / App Store → update A/C/CAN protocols → reboot and test.
4. Factory reset (last resort): Backup settings → perform factory reset → re-apply the correct CAN profile.

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Steering Wheel Controls (SWC)

Issue: Buttons don’t work or are mapped incorrectly

• CAN profile first: Ensure the correct Car Model / CANBUS profile is active.
• Re-learn SWC: Settings → SWC / Steering Wheel → long-press a function → press the wheel button to bind → save.
• Check SWC plug: Some harnesses have a dedicated SWC/Key wire block—confirm it’s connected.

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Reverse Camera / Video

Issue: No reverse image

1. Video input: Make sure the camera RCA is connected to the unit’s Rear/Reverse-In port (not AUX-In). ([IMG: Reverse-In port])
2. Reverse trigger: Ensure the reverse trigger signal (12V when in R) reaches the unit via CAN or dedicated wire (REV / BACK). Check your harness diagram.
3. Format / polarity: In Camera settings, toggle AHD/CVBS (if available) and adjust trigger source (CAN vs. wire) → test again.

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CarPlay / Bluetooth / Microphone

Issue: CarPlay unstable or not connecting

• Try wired CarPlay first (USB) to verify stability; then test wireless.
• Update the CarPlay/CP app (if separate) and the main firmware (see After Update).
• Forget the head unit on your iPhone and re-pair. Keep only one active Bluetooth pairing to avoid conflicts.

Issue: Callers can’t hear me

• Plug in the external mic (if included) and place it near the A-pillar; select external mic in settings if applicable.
• Reduce cabin noise sources (windows, fan speed) and re-test.

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FM Radio / Antenna / GPS

Issue: Poor FM reception

• Confirm the antenna adapter is the correct Nissan type and fully seated. Some cars require a powered antenna adapter—connect the ANT/AMP 12V lead.
• Route antenna cables away from high-current wires to reduce noise.

Issue: GPS weak or drifting

• Mount the GPS puck with clear sky view (dash near windshield); avoid metal shielding.
• Check the GPS connector is fully inserted; test after a short drive for satellite lock.

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Power / No-Boot / Random Reboot

Issue: Screen won’t power on

1. Verify ACC, B+ (constant 12V) and Ground at the main power plug using a multimeter.
2. Check the in-line fuse(s) on the harness; replace if blown.
3. Unplug all optional peripherals (DVR, 360, USB hubs) and test the bare unit.

Issue: Random reboot

• Remove non-essential USB devices; try another high-quality USB cable.
• Update firmware/protocols, then factory reset (after backup).

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After Firmware / Protocol Update

• Reconnect Wi-Fi → open Protocol Update / App Store → update CAN/A/C/CarPlay modules if available.
• Re-select the correct Car Model / CANBUS profile after updates, then reboot.
• Re-check audio type (BOSE vs. Non-BOSE), SWC learn, and camera trigger settings.

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Need More Help?

• WhatsApp Technical Support: +852 7048 2941
• Community references: AcuraZine Forum
• Return to the low-trim guide: Low Trim Troubleshooting