320D Hard/No Start

[ngoako7]

Hi All

I have an awesome 2009 320D LCI with a map and been driving amazing until recently(2months). The mileage is 207000km.

3 months ago, the car went into Limp mode while driving under normal conditions, and restarting it usually cleared the error. This happened sporadically and there was no pattern that led to the limp mode.

A few weeks later, after driving the car for some time (over 40min), and had to stop and switched off the car. When I tried starting it a few min later, the engine was not turning at all, and you could hear a clicking noise like it's trying to send a signal to the starter but nothing happened. To resolve this, I'd keep the car off for 300min, after which it would start without any issues. This happened on and off until recently.

All this time, my INPA scan wasn't able to communicate with the vehicle so I got a scan completed using LAUNCH Machine and that indicated the following:

• 2 Glow Plug errors
• Accelerator Pedal error

Then the current issue that I'm battling with is a hard/no-start. I got the vehicle scanned with the LAUNCH machine again, and also used Deep OBD App with my ELM327 Wifi adapter and both showed the following errors:

• Error 46C2 DME/DDE - Control Unit Internal Error
• Error 3F21 Accelerator Pedal Module Sensor 2
• KLIMA: PTC(LIN) Error

If I unplug battery for a few minutes, I'm still not able to start the car.
If I unplug ECU and plug it back in, then car starts fine. ECU is not damp inside and the ECU housing is dry.

So I'm not sure what the issue might be here, any suggestions on this?

 

[SubLoaded]

I've recently had the accelerator pedal module issue. The fix was a new pedal (literally).

Not too sure about the other issues..

 

[ngoako7]

I've recently had the accelerator pedal module issue. The fix was a new pedal (literally).

Not too sure about the other issues..

What were the symptoms of the faulty accel pedal module?

 

[Donovan2412]

Hi All

I have an awesome 2009 320D LCI with a map and been driving amazing until recently(2months). The mileage is 207000km.

3 months ago, the car went into Limp mode while driving under normal conditions, and restarting it usually cleared the error. This happened sporadically and there was no pattern that led to the limp mode.

A few weeks later, after driving the car for some time (over 40min), and had to stop and switched off the car. When I tried starting it a few min later, the engine was not turning at all, and you could hear a clicking noise like it's trying to send a signal to the starter but nothing happened. To resolve this, I'd keep the car off for 300min, after which it would start without any issues. This happened on and off until recently.

All this time, my INPA scan wasn't able to communicate with the vehicle so I got a scan completed using LAUNCH Machine and that indicated the following:

• 2 Glow Plug errors
• Accelerator Pedal error

Then the current issue that I'm battling with is a hard/no-start. I got the vehicle scanned with the LAUNCH machine again, and also used Deep OBD App with my ELM327 Wifi adapter and both showed the following errors:

• Error 46C2 DME/DDE - Control Unit Internal Error
• Error 3F21 Accelerator Pedal Module Sensor 2
• KLIMA: PTC(LIN) Error

If I unplug battery for a few minutes, I'm still not able to start the car.
If I unplug ECU and plug it back in, then car starts fine. ECU is not damp inside and the ECU housing is dry.

So I'm not sure what the issue might be here, any suggestions on this?

Ignoring the codes how old is your battery? Perhaps have it and your alternator tested.

 

[SubLoaded]

I've recently had the accelerator pedal module issue. The fix was a new pedal (literally).

Not too sure about the other issues..

What were the symptoms of the faulty accel pedal module?

Limp mode and CEL. Sometimes a restart would get rid of the issue temporarily.

---

Hi All

I have an awesome 2009 320D LCI with a map and been driving amazing until recently(2months). The mileage is 207000km.

3 months ago, the car went into Limp mode while driving under normal conditions, and restarting it usually cleared the error. This happened sporadically and there was no pattern that led to the limp mode.

A few weeks later, after driving the car for some time (over 40min), and had to stop and switched off the car. When I tried starting it a few min later, the engine was not turning at all, and you could hear a clicking noise like it's trying to send a signal to the starter but nothing happened. To resolve this, I'd keep the car off for 300min, after which it would start without any issues. This happened on and off until recently.

All this time, my INPA scan wasn't able to communicate with the vehicle so I got a scan completed using LAUNCH Machine and that indicated the following:

• 2 Glow Plug errors
• Accelerator Pedal error

Then the current issue that I'm battling with is a hard/no-start. I got the vehicle scanned with the LAUNCH machine again, and also used Deep OBD App with my ELM327 Wifi adapter and both showed the following errors:

• Error 46C2 DME/DDE - Control Unit Internal Error
• Error 3F21 Accelerator Pedal Module Sensor 2
• KLIMA: PTC(LIN) Error

If I unplug battery for a few minutes, I'm still not able to start the car.
If I unplug ECU and plug it back in, then car starts fine. ECU is not damp inside and the ECU housing is dry.

So I'm not sure what the issue might be here, any suggestions on this?

Ignoring the codes how old is your battery? Perhaps have it and your alternator tested.

+1 also thought about this

 

[Ratslaaf]

EDC17CP02 ecu in that car is usually very reliable, unless they get water. The fact that you getting internal error says a lot though. Have you disconnect the plugs in the ecu and checked nicely for corrosion on the pins?

 

[siuriu]

Sounds like a voltage issue, check your battery and alternator.
If you still have a problem check the positive cable on the battery.
Because it has a fuse that that can stop working which then causes the control units, in this case the DDE as it is a diesel and the preheating control unit for the glow plugs to switch off. the reason you could not connect you INPA on, is because you terminal 15 is off.
So try this.

:thumbs:
Pin 16 on the ODB-II connector is specified as "Battery Power" or "Battery Positive". There will always be 12v power between pin 4 and 16. Note that pin 5 has "ground" in the description, but that is just for the communication signalling and not for power.

enter image description here

The connector will always have power on these two pins regardless of the key position, and when you plug a device into the port it will have power and may come on by itself (many scanners do this).

However, this is only power and you won't be able to communicate with the car. The car's computers will not have constant power and are typically only active when the key is turned to the ON position. Some cars may power up certain CAN components or even the ECU in the ACC key position, but I've never seen that happen (limited experience).

Hope this helps :cartel:

 

[ngoako7]

Thanks for the replies all.
-> Have checked ECU Plugs and Pins for corrosion and there none evident.
-> Battery and Alternator haven't been tested yet, will get this done ASAP.
-> Re Voltage issue, will the positive cable or even battery/alternator cause intermittent issues? Maybe will remove battery and get it to a shop so it can be charged?

Last night I unplugged battery and ECU and replugged everything in again, and Car didn't start like last time :dunnoanymore: So will get battery tested, and if that fails will most likely take it to an auto electrician for them to check power etc.

 

[Spannie]

You may have a faulty injector. My 330d woukd cut out sometimes while driving, and at a point it would get so bad that the engine wouldn't start again. Turned out to be the electronics inside the injector which were ahorting out. I also got all kinds of strange errors...

Another thing to check is your alternators voltage regulator, also caused strange errors

Sent from my SM-G930F using Tapatalk

 

[ngoako7]

Just to close out this thread, it turns out the issue was HPFP related, but this after DDE and Glow Plugs were replaced. Thank you all for the input.

 

[SMRTARSX1]

Just to close out this thread, it turns out the issue was HPFP related, but this after DDE and Glow Plugs were replaced. Thank you all for the input.

I hope they cleaned the fuel lines and changed the filters... These HPFP's tend to ruin the motors when they let go.

 

[ngoako7]

Just to close out this thread, it turns out the issue was HPFP related, but this after DDE and Glow Plugs were replaced. Thank you all for the input.

I hope they cleaned the fuel lines and changed the filters... These HPFP's tend to ruin the motors when they let go.

Fuel lines were cleaned, cant see proof of filter change on invoice. I guess I'll js change it myself for peace of mind. Tx for the tip. :thumbs: