[WHOOSH22]

Hi,
Can anyone point me in the direction of where the PDC module is located please?

Regards
Whoosh

 

[SunglassesGuy]

I read early E60's had them in the trunk. realoem.com will help you locate it.

 

[gadgets4u]

In my Sept'05 E64 its in the shaped polystyrene block in what use to be the spare wheel well. Look for a module with three plugs/sockets on it
2 will be 12-way (front and rear sensors) and the other I think is an 8-way for power and bus connections.

 

[HerbP]

The PDC module does not usually fail, the wiring harnesses on the front & rear fail 1st. The module is in the trunk located as above. What kind of problems are you having?

 

[WHOOSH22]

Changed PDC sensor car worked fine, then car had a spring go on the rear had that changed now none of the sensors are clicking and PDC error comes on.

Think the mechanic may have caught a cable when he changed the spring, I have checked the trunk and cannot find the module?

 

[HerbP]

This link should help.

 

[WHOOSH22]

Thanks Herb, found module in trunk, and ordered a replacement.

 

[WHOOSH22]

Hi,
Can anyone share the wiring diagram for the PDC module please, as replacement module has not sorted?

 

[HerbP]

Which ever system is not working as far as the front & rear, change out that wiring harness. These harnesses are very fragile, & will break very easily. I would bet money that the module is not your problem.

New harness only!

 

[WHOOSH22]

Neither front or rear are working, so suspect it is the small connector harness which is broken.

 

[HerbP]

Strange that they both would fail at the same time. Does the module have power coming to it?

 

[WHOOSH22]

Going to check, does anyone have the pin-out for the power plug?

 

[HerbP]

Here you go.

Plug connector overview

Number	X-pin, colour	Description
X300	12-pin, black	Component connector Park distance control (PDC)
X18013	18-pin, natural	Component connector Park distance control (PDC)
X18362	18-pin, black	Component connector Park distance control (PDC)

Pin assignments at plug connector X300

Pin	Type	Description /Signal type	Connection /Measuring notes
1	E	Supply, terminal 30G	Fuse F69
2	E/A	Signal, CAN-bus	CAN-bus connector
3		Not used
4		Not used
5		Not used
6	M	Ground	Ground point
7		Not used
8	E/A	Signal, CAN-bus	CAN-bus connector
9		Not used
10		Not used
11		Not used
12		Not used

Pin assignments at plug connector X18013

Pin	Type	Description /Signal type	Connection /Measuring notes
1	M	Ground, ultrasonic sensor	Ultrasonic sensor, rear right
2	M	Ground, ultrasonic sensor	Ultrasonic sensor, rear left
3		Not used
4		Not used
5	A	Supply, ultrasonic sensor	Ultrasonic sensor, rear centre right
6	A	Supply, ultrasonic sensor	Ultrasonic sensor, rear centre left
7	A	Supply, ultrasonic sensor	Ultrasonic sensor, rear right
8	A	Supply, ultrasonic sensor	Ultrasonic sensor, rear left
9		Not used
10	M	Ground, ultrasonic sensor	Ultrasonic sensor, rear centre right
11	M	Ground, ultrasonic sensor	Ultrasonic sensor, rear centre left
12	E	Signal, ultrasonic sensor	Ultrasonic sensor, rear centre right
13	E	Signal, ultrasonic sensor	Ultrasonic sensor, rear centre left
14	E	Signal, ultrasonic sensor	Ultrasonic sensor, rear right
15	E	Signal, ultrasonic sensor	Ultrasonic sensor, rear left
16		Not used
17		Not used
18		Not used

Pin assignments at plug connector X18362

Pin	Type	Description /Signal type	Connection /Measuring notes
1	M	Ground, ultrasonic sensor	Ultrasonic sensor, front right
2	M	Ground, ultrasonic sensor	Ultrasonic sensor, front left
3		Not used
4		Not used
5	A	Supply, ultrasonic sensor	Ultrasonic sensor, front centre right
6	A	Supply, ultrasonic sensor	Ultrasonic sensor, front centre left
7	A	Supply, ultrasonic sensor	Ultrasonic sensor, front right
8	A	Supply, ultrasonic sensor	Ultrasonic sensor, front left
9		Not used
10	M	Ground, ultrasonic sensor	Ultrasonic sensor, front centre right
11	M	Ground, ultrasonic sensor	Ultrasonic sensor, front centre left
12	E	Signal, ultrasonic sensor	Ultrasonic sensor, front centre right
13	E	Signal, ultrasonic sensor	Ultrasonic sensor, front centre left
14	E	Signal, ultrasonic sensor	Ultrasonic sensor, front right
15	E	Signal, ultrasonic sensor	Ultrasonic sensor, front left
16		Not used
17		Not used
18		Not used

 

[WHOOSH22]

Thanks Herb, much apporeciated.

 

[gadgets4u]

I had a similar issue. Owner before me must have been in a nose to tail and the repairers had both bumpers off.
They must have had a trainee/apprentice doing the disassembly as both front and rear plug and sockets for PDC had one broken retaining clip.
With only one retaining clip, the pins weren't making full electrical connection when pushed together as there is a lot of weather proofing seals that cause resistance, effectively pushing the plug and socket apart without the second retainer.
Quick fix is to disassemble plug and sockets so the pin carriers are pushed out of the plug and socket housings and able to be plugged in to each positively. Then put the weather proofing and rest of the plug and socket housing back together around the pin carriers. Its lasted 2.5 years so far and saved getting a new harness from BMW.

 

[WHOOSH22]

Hi,
Checked the power plug this weekend and have the following:
12.6volts across pins 1 and 6
Pulses on pins 2 and 8

Faulty sensor or module error code 9E3B is stored?

 

[HerbP]

Have you tried holding your finger on all of the sensors for 3 to 5 seconds, to see if they vibrate. If none of them vibrate, I would start thinking the module is bad.

 

[WHOOSH22]

Have tried that and none vibrate at all.

 

[HerbP]

Strange

 

[WHOOSH22]

After searching the web, found a post from someone who had something very similar, fault down to shorted sensor.

So going to check PDC sensors on multimeter to hopefully fins the faulty one.

Post also suggests a shorted sensor can take out the module, so BMW clearly thought of current limiting circuitry when designing the module.