MK4 how-to guides
Step by step guides for the PVS 9 inch MK4 head unit. Pick a task, follow the steps, get back to driving. Fault finding lives on the Headunits hub.
Apps & downloads
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How to install an app on an Android head unit
The Play Store, the Google account step, and why sign-in fails on an out of date unit.
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How to pair a Bluetooth OBD2 adapter to an Android head unit
Pair the adapter in Settings first. An app cannot find an adapter the unit has not paired.
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How to install and set up Torque Pro on an Android head unit
Live engine data on the dash. Pair the adapter first, then set Torque to Bluetooth.
Phone & connectivity
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How to switch between Apple CarPlay, Android Auto and HiCar
The unit opens in CarPlay mode. The PVS Link app is where you change it, not Settings.
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How to get an Android head unit online
A SIM in the unit, a WiFi or Starlink network, or a phone hotspot. Three ways, one setting screen.
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How to run CarPlay at the same time as Starlink or a hotspot
A phone WiFi radio joins one network at a time. Wired CarPlay frees it for Starlink.
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How to set up hands-free calling and fit the microphone
Pair over Bluetooth, then mount the supplied mic close to the driver. Placement decides call quality.
Audio & amplifiers
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How to connect an external amplifier to an Android head unit
Front pre-outs on Harness A, rear pre-outs on Harness C, turn-on lead is the blue wire on A1.
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How to add a subwoofer to an Android head unit
A dedicated sub output on A16, a pair of green RCAs, separate from the four pre-outs.
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How to connect a DSP using the digital audio output
Optical SPDIF on the rear panel, coaxial SPDIF on C6. Two outputs, pick the one your DSP has.
Cameras & vision
Steering wheel controls
Setup & maintenance
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How to update the software on an Android head unit
FAT32 is the whole trick. The update performs a factory reset, so know what comes back and what does not.
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How to factory reset an Android head unit and what you lose
Settings, System, Reset. It wipes apps, logins, pairings and settings, so prepare before you tap it.
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How to check whether a head unit is draining the battery
Two supplies, permanent and switched. A current draw test at the fuse settles it in ten minutes.