FIXED UPDATE What went wrong real fast daughter with newborn - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-25-2006, 11:29 PM   #11
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P1675
Circuit Description

Output Driver Modules (ODMs) are used by the PCM to turn on many of the current-driven devices that are needed to control various engine and Transaxle functions. Each ODM is capable of controlling up to 7 separate outputs by applying ground to the device which the PCM is commanding ON. Unlike the Quad Driver Modules (QDMs) used in prior model years, ODMs have the capability of diagnosing each output circuit individually. DTC P1675 set indicates an improper voltage level has been detected on ODM D output 5, which controls the EVAP canister vent valve.
Conditions for Setting the DTC

* The ignition is ON.
* An improper voltage level has been detected on the EVAP canister vent valve control circuit.
* The above conditions are present for at least 30 seconds.

Action Taken When the DTC Sets

* The PCM will not illuminate the malfunction indicator lamp (MIL).
* The PCM will store conditions which were present when the DTC set as Failure Records data only. This information will not be stored as Freeze Frame data.

Conditions for Clearing the MIL/DTC

* A History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
* The DTC can be cleared by using the scan tool Clear Info function.

Diagnostic Aids

Check for the following conditions:

* Poor connection at PCM or the EVAP canister vent valve. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
* Damaged harness. Inspect the wiring harness for damage.
* If the harness appears to be OK, disconnect the PCM, turn the ignition ON and observe a voltmeter connected to the EVAP canister vent valve control circuit at the PCM harness connector while moving connectors and wiring harnesses related to the EVAP canister vent valve. A change in voltage will indicate the location of the malfunction.

Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
Test Description

Number(*) below refer to the step number(*) on the Diagnostic Chart.

2.

Ignition feed voltage should be present on the control circuit with the PCM disconnected and the ignition turned ON.
3.

Checks for a shorted component or a short to B+ on the control circuit. Either condition would result in a measured current of over 800 milliamps. Also checks for a component that is going open while being operated, resulting in a measured current of 0 milliamps.
4.

Checks for a short to voltage on the control circuit.


Man..I type fast...(Hey.. is the keyboard supposed to be smoking? HELP)
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Old 01-25-2006, 11:30 PM   #12
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Like I said though..I bet with the AZ weather..there'* a bad vacuum hose for the evap issue...

Not sure about the tcc
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Old 01-25-2006, 11:46 PM   #13
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As I said before, it amazes me that one minute it is fine and the next it isn't.
All three codes at one time has me thinking it is all electrical or all vacuum.
As I am typing this I am remembering the first call I got, my daughter said that on the way to the doctors the check engine light came on and she called me to tell me about it. She said she arrived at the doctors and when she left for the trip home she noticed the engine was running rough, she called again to tell me.
I had told her that I thought she might have a problem with a spark plug wire because I had recently changed them and they were not Beldan brand.
She made it home and on this past Saturday, David, (babys father) and put new wires on the car for her.
It was after the new wires were put on that she said it was running smoother.
She has not said she has driven the car since the wire changes so I am assuming she hasn't.
Fast forward to today and David said that she couldn't drive the car and when David checked the codes, that is what came up.
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Old 01-25-2006, 11:48 PM   #14
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Quote:
Originally Posted by BillBoost37
Like I said though..I bet with the AZ weather..there'* a bad vacuum hose for the evap issue...

Not sure about the tcc
Bill - thanks for the typing, I know it is alot of work. I will be sending a link to this thread to her so she can print it out.
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Old 01-26-2006, 12:55 AM   #15
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Sorry to hear about the troubles Nick. At this point, I don't have anything to add (yet), but will be looking through the book to see if there is information that might point to something in common among the different problems.
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Old 01-26-2006, 02:07 AM   #16
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A liitle bit of info I found. Not sure it will help, but here goes.

OK...there is a lot of material to read through. SO far, all I found was a common fuse that may be worth checking (maybe not)..

In the "Right-hand side power distribution center" (Fuse block/panel on the passneger side, behind the hush panel, near the HVAC programmer. Fuse cavity #5 (20 Amp) (MIsc Engine) on this panel is tied to the EVAP purge system and.... it shows a connection to the Transaxle as well...also some other connections...The trouble shooting steps indicate to inspect this fuse...may not be the problem but it is a listed step for P0740 diagnosis.

Also, for code P1655, says to check "Ignition Fuse Feed" for the EVAP Vent Purge Solenoid..not sure if this is different from fuse #5 mentioned above.
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Old 01-26-2006, 02:08 AM   #17
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I have a hard time believing an Evap problem would prevent a start or cause poor performance.
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Old 01-26-2006, 02:17 AM   #18
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Quote:
Originally Posted by willwren
I have a hard time believing an Evap problem would prevent a start or cause poor performance.
Hey, I am fishing for anything here, Bill....I have been shuffling through the trouble-shooting parts of these codes and looking for something simple for Nick to pass along to the family. I was concentrating on the codes Nick found.

One of the steps for code P0740 clearly says to inspect that fuse. According to the electrical schematic, that fuse also is connected with the Evap Vent Solenoid, Vacuum Valve, and Purge Valve...it also is in line with the EGR valve, both O2 sensors. and, of course, the PCM.

I was just tryin' to help
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Old 01-26-2006, 08:56 AM   #19
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Honestly.. having seen some fuses and relay tabs burned and discolored on many of our cars... Nick..you may want to suggest he double check that one for heat fatigue by pulling and looking at the pins on it.
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Old 01-26-2006, 10:05 AM   #20
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I have sent the link to this thread off to them and I know they will be reading it.
I guess the first thing to check will be the 2 fuses that Bob talks about and then off to the vacuum lines and then last will be the electrical connections of the 3 solenoids.
This may sound redundant but they will not know where this fuse panel is.
This fuse panel is under the glove box, remove the cover (2 screws).
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