MQB tow bar retrofit: Difference between revisions
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Now ABS/ESP, since additional weight and mass balance will impact braking performance and stability control | Now ABS/ESP, since additional weight and mass balance will impact braking performance and stability control | ||
0x03 → | //not confirmed yet! Heavy dependency on the ABS pump version! | ||
0x03 → Long Coding → Byte 01 → Bit 7 → installed | |||
or | or | ||
0x03 → 24 → 7 | 0x03 → Long Coding → Byte 24 → Bit 7 → installed | ||
=== 0x09 - Body Control Module === | === 0x09 - Body Control Module === | ||
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Parking sensors. This will tell the module that it should expect trailer behind the car - not an obstacle. | Parking sensors. This will tell the module that it should expect trailer behind the car - not an obstacle. | ||
0x10 or 0x76 → LongCoding → Byte 3 → Bit 0-1 | 0x10 or 0x76 → LongCoding → Byte 3 → Bit 0-1 Trailer Hitch installed - manually removable → installed | ||
=== 0x13 - ACC === | === 0x13 - ACC === | ||
Adaptive Cruise Control | Adaptive Cruise Control | ||
0x13 → | 0x13 → Long Coding → Byte ?? → Bit ? Control Module for Towing → installed | ||
=== 0x17 - Instrument Cluster === | === 0x17 - Instrument Cluster === | ||
Instrument Cluster also needs to know about the trailer. | Instrument Cluster also needs to know about the trailer. | ||
0x17 → | 0x17 → Long Coding → Byte ?? → Bit ? Towing Capacity Display → Yes | ||
=== 0x3C - Side Assist / Blind Spot === | === 0x3C - Side Assist / Blind Spot === | ||
Since you are dragging something behind your car, blind spot sensors will see it permanently. Let them know about it. | Since you are dragging something behind your car, blind spot sensors will see it permanently. Let them know about it. | ||
0x3C → Long Coding → | 0x3C → Long Coding → Byte ?? → Bit ? ECU for Draw Bar → with | ||
=== 0x6C - Rear View Camera === | === 0x6C - Rear View Camera === | ||
Latest revision as of 22:53, 7 April 2025
Supported cars
- Audi A3 (8V) MK3
- Audi Q2
- Seat Leon (5F) MK3
- Skoda Octavia (5E) MK3
- Skoda Superb
- VW Golf (5G) MK7
- VW Passat (3G) B8
- VW Arteon
Hardware
TODOoo
Wiring
TODOoo
Coding & Adaptation
Some experts decided to add module to gateway (so it works) and code it in parktronic (so the customer sees the trailer on the display). That's hardly all the modifications that are required for full integration. [1][2]
Add module to Gateway
0x19 → InstallationList → add module 0x69 (Trailer Hitch module)
Now you can check if the trailer module is available in the modules list at address 0x69
Adjust tow bar module coding
0x69 → Coding
0x01 - Engine Control Module
Let rest of the car know about new feature. Starting with Engine Control Module.
Notice: actual Byte/Bit address depends on the engine that you have in your car
0x01 → LongCoding → Byte 5 → Bit 4 (Trailer Recognition installed) //TODO: other configs for other engines
0x03 - Brakes and Stability
Now ABS/ESP, since additional weight and mass balance will impact braking performance and stability control
//not confirmed yet! Heavy dependency on the ABS pump version! 0x03 → Long Coding → Byte 01 → Bit 7 → installed or 0x03 → Long Coding → Byte 24 → Bit 7 → installed
0x09 - Body Control Module
It controls mostly lights. I believe trailer will impact things like rear fog light, maybe indicators.
Notice: around 2016/17 BCM does not use LongCoding anymore. It will be filled with 00s.
0x09 → LongCoding → Byte 1 → Bit 1 (Trailer Hitch Control Module installed) 0x09 → Adaptation → Vernetzung → anhaengeranschlussgeraet → installed
0x10 / 0x76 - Parking Sensors
Parking sensors. This will tell the module that it should expect trailer behind the car - not an obstacle.
0x10 or 0x76 → LongCoding → Byte 3 → Bit 0-1 Trailer Hitch installed - manually removable → installed
0x13 - ACC
Adaptive Cruise Control
0x13 → Long Coding → Byte ?? → Bit ? Control Module for Towing → installed
0x17 - Instrument Cluster
Instrument Cluster also needs to know about the trailer.
0x17 → Long Coding → Byte ?? → Bit ? Towing Capacity Display → Yes
0x3C - Side Assist / Blind Spot
Since you are dragging something behind your car, blind spot sensors will see it permanently. Let them know about it.
0x3C → Long Coding → Byte ?? → Bit ? ECU for Draw Bar → with
0x6C - Rear View Camera
RVC High or AreaView 360 should start in the Trailer Mode if the trailer is connected.
0x6C → Long Coding → Byte 04 → Bit 0 Trailer Control Unit (J345) → installed 0x6C → Long Coding → Byte 07 → Bit 2 Trailer Towing View → enable
0x6D - Trunk Door
Let's let it know that there might be an obstacle behind the car
0x6D → Long Coding → Trailer → installed
0xA5 - Multifunctional Assisten Camera
Multifunction camera also needs to know about the tow bar and trailer. For one, the camera will be pointing slightly higher when trailer is connected. And if you have Traffic Sing Assist or Traffic Sign Recognition it will also show you trailer-related signs.
0xA5 → Long Coding → Byte 11 → Bit 0 (AAG) → installed