Honda info

headunit.md

How to do things with a 2018 Honda CR-V headunit.

This is written out of my frustration with a lot of wrong info on YouTube and the like.

Model:

• MY16ADA

Rooted using root-honda.

Android Version:

• 4.2.2

Kernel verion:

• 3.1.10+ Mar 14 13:20:49 JST 2018

Build:

• 1.F1A2.34

Passcord (sic):

• Kernel
• Model
• Build
• Status

Diagnostic Mode:

• from default menu, hold
  • brightness
  • phone
  • power

Next secret menu:

• from above:
  • press bottom button then
  • press and hold phone

Next secret menu:

• from above:
  • press and hold home
• set USB to device, connect your laptop.
  • nb: you must use a USB-A (male) <-> USB-A (male) cable. I tried several iterations of USB-C <-> USB-A and no go.
  • put steps to get root here
  • after you inject your cert, you need to reboot. this boot takes about three minutes.

Some stuff to try:

• adb shell am start -a android.intent.action.VIEW -d http://mitm.it
  • this is how I installed the mitm cert. You have to set a PIN.
• adb shell pm grant com.android.chrome android.permission.READ_EXTERNAL_STORAGE
  • I didn't need to do this.

notes.md

Network stuff

• It makes sure it can get a 204 from Google
• After rooting and putting the MITM CA cert in the system store, I got the contents of one of the requests to jp.hondalink. A stripped JSON file is attached. In the ECO stanza, there were 14 trips.
  • The ECO stanza has a Score stanza
  • This is related to the Honda Navigation System, which is an option I don't have
  • The scores are explained on page 112 of the Honda CRV owner manual
• POST https://www.jp.hondalink.com/CRM/VehicleData/mfs/upload contains the content of triplog.json
• http://192.168.1.1/kvs/vin gets a PUT once a minute with the VIN of the vehicle
• remove pinlock
  • rm /data/system/gesture.key

triplog.json

{
  "TripLog": {
    "ECO": [
      {
        "FuelConsumption1Trip": "",
        "FuelConsumptionTripA": "",
        "FuelConsumption1TripUnit": "",
        "DrivingRangeUnit": "",
        "Mileage": "",
        "TripId": "",
        "MileageUnit": "",
        "DrivingRange": "",
        "FuelConsumptionTripAUnit": "",
        "TripDate": "",
        "FuelUsed": "",
        "StartPos": {
          "Lat": "",
          "ODO": "",
          "Time": "",
          "Lon": "",
          "Datum": ""
        },
        "Score": {
          "AcclAdviceMsg": "",
          "IdleAdviceMsg": "",
          "LifetimeTotalScore": "",
          "IdleScore": "",
          "BrakeScore": "",
          "IdleStopTime": "",
          "ClassJudge": "",
          "BrakeAdviceMsg": "",
          "TotalScore": "",
          "AcclScore": ""
        },
        "FinishPos": {
          "Lat": "",
          "ODO": "",
          "Time": "",
          "Lon": "",
          "Event": "",
          "Datum": ""
        },
        "ODOUnit": ""
      }
    ],
    "VehicleInfo": {
      "OilLifeB": "",
      "AtmosphericPressure": "",
      "VIN": "",
      "MaintenanceMinderRaw": "",
      "MaintInfo": "",
      "WarnLampMsg": "",
      "OutsideTemp": "",
      "BatteryVoltage": "",
      "MaintenanceMinder": "",
      "Mileage": "",
      "MaintDateUnit": "",
      "OilLifeF": "",
      "MaintUnit": "",
      "OilLife": "",
      "FuelLevel": "",
      "Pos": {
        "Lon": "",
        "Lat": "",
        "Datum": ""
      },
      "Speed": "",
      "ElapsedTime": "",
      "EngineRPM": "",
      "EwMaint": "",
      "MaintData": "",
      "TirePressure": {
        "RR": "",
        "RL": "",
        "FR": "",
        "FL": ""
      },
      "NaviEcuId": "",
      "CoolantTemp": "",
      "TotalIGCycle": ""
    }
  }
}