Editing Openai/69416939-f2c4-8006-8547-74f228e826f2 (section)

==== What must be correct for cruise to work ====

===== 1. ECU coding still set to AUTOMATIC (most common cause) =====

After the swap, the engine ECU must be recoded for manual transmission.

Fix
* VCDS → 01 Engine
* Coding
* Change transmission bit from automatic → manual
* Save and cycle ignition

If this is not done, cruise will never engage.

===== 2. Clutch switch missing or wired incorrectly =====

Manual cars require two clutch-related inputs:

| Switch                        | Function           | Required  |
| ----------------------------- | ------------------ | --------- |
| Clutch pedal switch (F36)     | Cruise cancel      | YES       |
| Clutch position switch (F194) | Idle & start logic | Often YES |

Cruise will not work if ECU never sees “clutch released.”

Check
* VCDS → 01 Engine → Measuring Blocks
* Look for Clutch Pedal status
* Must change from Pressed → Released

Wiring (AVF ECU – common)
* One clutch switch pin → ECU clutch input
* Other pin → ground or 12V (depends on switch type)

If no clutch switch is fitted, cruise will be permanently disabled.

===== 3. Brake light switch incorrect (needs 4-pin version) =====

Auto → manual swaps often keep the wrong brake switch.

Correct brake switch
* 4-pin brake light switch
* One circuit for brake lights
* One circuit for ECU/cruise

Symptoms of wrong switch
* Cruise won’t set
* Brake lights may still work normally

Check in VCDS
* Measuring blocks → Brake pedal must show: - Brake NOT pressed = OFF - Brake pressed = ON

===== 4. TCU (automatic gearbox ECU) still interfering =====

If the automatic TCU is still connected or partially wired, it can block cruise logic.

Fix
* Fully disconnect/remove TCU
* Clear all related fault codes

===== 5. Cruise stalk wiring (usually already OK) =====

Since cruise worked before the swap, this is least likely, but still verify:
* ON / SET / RES signals appear in measuring blocks