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Discussion Starter #1
If you get in your Volt...and it takes forever to initialize...and then the following four messages appear...SERVICE THEFT DETERRENT SYSTEM, SERVICE POWER STEERING, SERVICE BRAKE ASSIST, and SERVICE STABILITRAK...you then put your car in D and nothing happens...you will be towed to your dealership...where upon examing the vehicle they will discover you need a new Engine Control Module...which they will replace(after they have one shipped in), then set up new ecm, test drive and declare repair completed...:)

All covered under your Voltec warranty...:)

Hopefully, if it happens to you, you'll be be sitting at home, so your wife can grab another vehicle to head to work...
 

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5 PERCENT of the WIFES WORK ?... Lucky in love ,unlucky in Volt !!!. As the Volt gen.1 gets old this ICE related issues will be more common, hopefully not too frequent....Whay year, how many miles on the ICE ?. Regards.
 

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Discussion Starter #3 (Edited)
5 PERCENT of the WIFES WORK ?... Lucky in love ,unlucky in Volt !!!. As the Volt gen.1 gets old this ICE related issues will be more common, hopefully not to frequent....Whay year, how many miles on the ICE ?. Regards.
She works because she has horses...Lusitanos...(expensive horses, they get acupuncture and massages)...:)

2013
95% electric
Engine runs primarily to do engine maintenance, fuel burn and ERDTTs...:)
 

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Amazing minimal use of engine, but ENGINE CONTROL MODULE bad...hard to explain unless is just a basic electric failure probably unrelated to the engine itself, perhaps some of the multiple sensors of the engine ?... If things get hard always you could use the great portuguese horses of your wife LOL.
 

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Normally bad ECMs do nothing. DOA. Car will not react to a power on signal. A paperweight responses more. I've bricked GM ECMs before.

Interesting.

Normally if I saw those symptoms in a car, I'd disconnect the battery for 30 minutes, and put a battery charger on the battery while waiting. Then reconnect the battery and try again. This will clear comm errors between the computers or a low 12v signal from the battery.
 

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Discussion Starter #6 (Edited)
Normally bad ECMs do nothing. DOA. Car will not react to a power on signal. A paperweight responses more. I've bricked GM ECMs before.

Interesting.

Normally if I saw those symptoms in a car, I'd disconnect the battery for 30 minutes, and put a battery charger on the battery while waiting. Then reconnect the battery and try again. This will clear comm errors between the computers or a low 12v signal from the battery.
Since I'm still under warranty...I let GM take care of it...:)

The notes from the Volt Mechanic says...18617 no start. no communication with engine control module. remove bumper cover to get to ecm. check power and ground to ecm. system voltage. check data circuit. 60 ohms through pin 6 14 at dlc. needs ecm replaced , internal open. replace ecm program claim code 11b68.
 

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Sounds like 12v battery failure. Maybe suggest they check it first, or maybe they want GM to pay for some service work.
 

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DOA, excellent term, but as QINSP says could be a generic GM ECM problem or what else ?...WOT opinion will help, in the differential diagnosis could be lightining, or perhaps some lazy relay not clicking ?...was the car charging prior to the sudden death?...We should call Mr Poirot to resolve this Agatha Christie mystery.
 

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ECM failures are rare. Often it's mistakenly replaced by mechanics on ICEs.
Especially rare on GM's. I've owned a lot of modern GMs. The only failures I've witnessed/caused had to do with modifying the ECM or harness for racing. Usually reflashing the ECM when the battery is too low or the flash is interrupted.

Several times I've woken up 'dead' ECM by just reflashing them.
 

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ECMs in general, simply don't fail unless they get a serious power spike or a reflash is interrupted. I know the thinking here is the ECM is an ICE component but I would be very, very surprised if the Volt's ECM doesn't also manage a lot of the electric drivetrain as well. Also, I believe the first message OP reported is a BCM (Body Control Module) message. The others are ECM messages.
 

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Discussion Starter #12
Sounds like 12v battery failure. Maybe suggest they check it first, or maybe they want GM to pay for some service work.
Well, since the car is working and the 12 volt battery has not been replaced...it appears it was not a 12 volt battery failure...:)
 

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The car was left for charging at Friday and Monday morning during start up the same faults was displayed:

SERVICE THEFT DETERRENT SYSTEM,
SERVICE POWER STEERING,
SERVICE BRAKE ASSIST

The MDI was connected to diagnose the problem. The first diagnostics show faults
P0AC4
C0561
U180D
U1858
P0513
U1833
U0077
U0151
U0126
U0293
C0242
U0401
U0415
U0121

After clearing it the remaining faults was:

P0598
P0689
P1682
P262B
P0335
C0242

No MIL illumination in display panel.
No 0V at KR75 engine rellay pin 85 and ECM X1 pin 40.

The firmware of ECM was updated by SPS and it did not solve the problem.
The new ECM was ordered from ebay.com/itm/332350215088

The ECM was replaced, firmware updated according service manual by SPS and all problems gone. Volt starts.

It interesting to find the reason of ECM fault. Have somebody ideas regarding it?
 
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