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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > E90 Serious Electrical Issues--- Need Help Please



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      04-25-2017, 03:28 AM   #1
iZ4vel
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Exclamation E90 Serious Electrical Issues--- Need Help Please

Initial Suspected Issue:

Discovered my (2006) E90's Battery Cable Positive Power Distribution Box To Battery Cable was DESTROYED as it was sitting under my car's battery. This cable has been replaced with NEW BMW part. Electrical issue persist.




Current Vehicle Symptoms:
Engine turns but I cannot get ignition. Battery has been fully charged and tested, it's a good battery. Even swapped my BMW Z4's battery in with higher cranking amps in there and still nothing.

CURRENT CODES:

PEAKE BMW Tool (R5/FCX3)
Table 20
(Codes in Order Received)
2EF5 Map Thermostat, Input Signal
2DEC Power Management, Battery Control
2E77 Ignition, Voltage Supply
2A3F Valvetronic, Servo Motor: Power Supply
2AE0 Idle Running Control During Cold Start
2A38 Valvetronic, Actuator: Sluggish or Open Circuit
2A9E Camshaft Sensor Intake, Synchronization
2A9F Camshaft Sensor Exhaust, Synchronization


INNOVA 3100ABS (Generic OBD-II) Tool
(Codes in Order Received)
P0597 Thermostat Heater Control Circuit/ Open
P1056 (BMW) VVT Control Motor Bank 1, Supply Voltage Input Too Low
P1561 (BMW) The DTC definition is not available
P1030 (BMW) The DTC definition is not available
P0344 Camshaft Position Sensor A Circuit Intermittent (Bank 1 or Single Sensor)
P0369 Camshaft Position Sensor B Circuit Intermittent (Bank 1)


Steps Taken So Far:

As mentioned above, the E90's Battery Cable Positive Power Distribution Box To Battery Cable (61 12 6 938 504) was replaced with NEW BMW part.

I've also replaced ALL THREE DME Relays with NEW BMW relays in the Distribution Box, but have not replaced the GREEN relay as it's on order.


Lastly, I've searched everywhere but cannot find a male connector for this female lead (screwdriver is pointing to female lead)

Last edited by iZ4vel; 04-25-2017 at 03:45 AM.
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      04-25-2017, 09:27 AM   #2
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The codes look like what you get with a low battery. The Intelligent Battery Sensor (IBS) is connected to the negative terminal, and can have some weird symptoms. If you haven't already, I would also do a sweep of all of the fuses to make sure you don't have any blown ones.

I believe the last picture is a shipping connection from original delivery, it is meant to be left disconnected.
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      04-25-2017, 10:21 AM   #3
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Did you try replacing your battery? Looks like you have a non AGM one.
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      04-26-2017, 04:54 AM   #4
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Those cam sensor faults stand out to me.
DME doesnt know when to fire spark or inject fuel so it just cranks and cranks and cranks.
But it's unusual for both to be faulty. Do you have access to an oscilloscope?
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      05-08-2017, 12:42 AM   #5
iZ4vel
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I have installed a new battery and all new relays but I still have 2 codes: 2A3F and 2A38

The good news is that 5 codes went away after the new battery and relays!

LAST Remaining Codes:
2A3F Valvetronic, Servo Motor: Power Supply
2A38 Valvetronic, Actuator: Sluggish or Open Circuit

I don't think I have a bad Valvetronic motor or sensor.
Any ideas????
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      05-08-2017, 09:43 AM   #6
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Not a fuse, right?

May want to check power and continuity with a multimeter at the Valvetronic motor.
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      05-08-2017, 11:50 PM   #7
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What I noticed is most of those codes are voltage issues with items that have non-replacable fuses on the power distribution box located on the positive battery terminal. That positive wire could have shorted the non-replicable fuses in the distribution box.

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      05-26-2018, 10:04 PM   #8
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Distribution fuse box

Is there a way to check this distribution box for weak current or just working or not ?
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