The automatic transmission control unit in a Citroen C4 is usually located in one of the following locations:
* Under the hood: Near the engine, often on a bracket or mounting block.
* In the cabin: Under the instrument panel or in the center console.
The exact location may vary depending on the year, model and trim levels of your Citroen C4.
Here are the steps to help you find the automatic transmission control unit:
1. Open the hood: Open the hood and inspect the area around the engine.
2. Look for the wiring block: Locate the wiring block, which is usually a plastic or metal box with electrical connectors.
3. Check Connectors: Inspect the connectors on the mounting block to locate the connector that matches the A/T wiring harness.
4. Trace the wires: Trace the wires coming from the connector towards the automatic transmission.
5. Locate the automatic transmission control unit: The automatic transmission control unit is usually located at the end of the wires. It is a small device containing electronic components and electrical connectors.