Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
E60, E61, E63, E64 - PDC Control Unit
Installation location
On the BMW 5-Series, the PDC control unit is located under the spare wheel in the luggage compartment well. The PDC control unit is fitted in the function carrier (illustration shows E60).
On the BMW 6-Series, the function carrier is in front of the battery in the luggage compartment well.
Construction
The PDC control unit is connected to the rest of the vehicle electrical system by 3 plug connectors.
Pin assignment for X300, 12-pin
| Pin | Type | Description |
|---|---|---|
| 1 | V | Power supply, terminal 15 |
| For vehicles from 03/2004: terminal 30g (active) | ||
| 2 | E/A | CAN high on K-CAN |
| 3 | --- | --- |
| 4 | --- | --- |
| 5 | --- | --- |
| 6 | M | Earth, terminal 31 |
| 7 | --- | --- |
| 8 | E/A | CAN low on K-CAN |
| 9 | --- | --- |
| 10 | --- | --- |
| 11 | --- | --- |
| 12 | --- | --- |
| E/A = Input and output | ||
| M = Earth | ||
| V = Supply | ||
| For current specifications regarding pin assignment, please refer to BMW diagnosis system | ||
Pin assignment for X18013, 18-pin
| Pin | Type | Description |
|---|---|---|
| 1 | A | Earth for ultrasonic sensor, rear right |
| 2 | A | Earth for ultrasonic sensor, rear left |
| 3 | --- | --- |
| 4 | --- | --- |
| 5 | A | Power supply for ultrasonic sensor, rear middle right |
| 6 | A | Power supply for ultrasonic sensor, rear middle left |
| 7 | A | Power supply for ultrasonic sensor, rear right |
| 8 | A | Power supply for ultrasonic sensor, rear left |
| 9 | --- | --- |
| 10 | A | Earth for ultrasonic sensor, rear middle right |
| 11 | A | Earth for ultrasonic sensor, rear middle left |
| 12 | E | Signal from ultrasonic sensor, rear middle right |
| 13 | E | Signal from ultrasonic sensor, rear middle left |
| 14 | E | Signal from ultrasonic sensor, rear right |
| 15 | E | Signal from ultrasonic sensor, rear left |
| 16 | --- | --- |
| 17 | --- | --- |
| 18 | --- | --- |
| A = Output | ||
| E = Input | ||
| For current specifications regarding pin assignment, please refer to BMW diagnosis system | ||
Pin assignment for X18362, 18-pin
| Pin | Type | Description |
|---|---|---|
| 1 | A | Earth for ultrasonic sensor, front right |
| 2 | A | Earth for ultrasonic sensor, front left |
| 3 | --- | --- |
| 4 | --- | --- |
| 5 | A | Power supply for ultrasonic sensor, front middle right |
| 6 | A | Power supply for ultrasonic sensor, front middle left |
| 7 | A | Power supply for ultrasonic sensor, front right |
| 8 | A | Power supply for ultrasonic sensor, front left |
| 9 | --- | --- |
| 10 | A | Earth for ultrasonic sensor, front middle right |
| 11 | A | Earth for ultrasonic sensor, front middle left |
| 12 | E | Signal from ultrasonic sensor, front middle right |
| 13 | E | Signal from ultrasonic sensor, front middle left |
| 14 | E | Signal from ultrasonic sensor, front right |
| 15 | E | Signal from ultrasonic sensor, front left |
| 16 | --- | --- |
| 17 | --- | --- |
| 18 | --- | --- |
| A = Output | ||
| E = Input | ||
| For current specifications regarding pin assignment, please refer to BMW diagnosis system | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.