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Thread: Engine problems from spain
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08-20-2012, 02:51 PM #41
Sounds like the Throttle Position Sensor is not working. I'm not familiar with GM TPS's, maybe someone else can identify the sensor in the picture you posted.
I found this info on this online Indmar manual:
SPN 65618
FMI 7
Fault Description: ETC Return Fault Mechanical System Not Responding or Out of Adjustment
Diagnotsic procedure:SPN 65615, 65616, or 65618 on page 9-147
ftp://ftp2.indmar.us/Manuals/Service...iagnostics.pdf
From reading the disgnostic procedure, sounds like the ELECTRIC MOTOR that moves the butterfly is the problem, not the TPS that reads it's position.
SPN 65615, 65616, or 65618
Diagnostic Instructions
• Perform the Powertrain On Board
Diagnostic (OBD) System Check on page 9-64
prior to using this diagnostic procedure.
• Review Strategy Based Diagnosis on page 6-4 for
an overview of the diagnostic approach.
• Diagnostic Procedure Instructions on page 6-5
provides an overview of each diagnostic category.
SPN Descriptors
SPN 65615 FMI 7: Electronic Throttle Control (ETC) Actuation Fault Mechanical System Not Responding or Out
of Adjustment
SPN 65616 FMI 12: Electronic Throttle Control (ETC) Process Fault Bad Intelligent Device or Component
SPN 65618 FMI 7: Electronic Throttle Control (ETC) Return Fault Mechanical System Not Responding or Out of
Adjustment
Circuit/System Description
The engine control module (ECM) controls the throttle
valve by applying a varying voltage to the control
circuits of the throttle actuator control (TAC) motor.
The ECM monitors the duty cycle that is required to
actuate the throttle valve. The ECM monitors the throttle
position (TP) sensors 1 and 2 to determine the actual
throttle valve position.
Conditions for Running the SPN
65615–7
• Before the ECM can report that SPN 65615–7
failed, SPNs 65601, 65602, 65610, and 65618–7
must run and pass.
• SPN 630, 65580, 65620, 65621, 65622, or 65623
is not set.
• The ignition is ON, or the engine is operating.
• The minimum throttle position is learned.
• The ignition voltage is greater than 9 volts.
• SPN 65615 runs continuously when the above
conditions are met.
65616–12
• SPN 630, 65580, 65620, 65621, 65622, or 65623
is not set.
• The ignition is ON, or the engine is operating.
• SPN 65616 runs continuously when the above
conditions are met.
65618–7
• Before the ECM can report that SPN 65618–7
failed, SPNs 65601, 65602, and 65610 must
run and pass.
• SPN 630, 65580, 65620, 65621, 65622, or 65623
is not set.
• The ignition is ON, or the engine is operating.
• SPN 65618 runs continuously when the above
conditions are met.
Conditions for Setting the SPN
65615–7
The difference between the commanded and the
actual throttle position is greater than 10 percent for
greater than 276 mS.
65616–12
The predicted throttle position calculations in the main
processor differ from the motor control processor.
65618–7
The ECM detects that the throttle blade did not return
to the default position, during power up.
Action Taken When the SPN Sets
• SPN 65615, 65616, and 65618 are Type A SPNs.
• The ECM commands the TAC system to
operate in a Reduced Engine Power mode.
Conditions for Clearing the SPN
SPN 65615, 65616, and 65618 are Type A SPNs.
Diagnostic Aids
• Inspect for a condition in which the throttle valve
may have been held open. For example, ice
may have formed in the throttle bore causing the
throttle valve not to close.
• A high resistance condition on the throttle position
and throttle actuator control circuits could cause
a DTC to set.
• A low battery condition may cause a DTC to set.
Engine Controls and Fuel - Marine 9-1472017 Moomba Craz
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08-20-2012, 03:13 PM #42Senior Member
- Join Date
- Jun 2010
- Location
- Lake Houston
- Posts
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His boat is not drive-by-wire. It has a throttle cable connected directly to the butterfly valve. Shouldnt be an electric motor opening and closing. So again, sounds like the position sensor.
2013 LSV
2005 LSV - SOLD
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08-20-2012, 04:13 PM #43
Then you must be right, but weird it's giving and ETC fault.
Why aren't any of the Indmar techs helping this poor guy out on here? I bet they could read his fault list and tell him exactly what wrong or at least tell him what specifically to check for.2017 Moomba Craz
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08-20-2012, 04:42 PM #44
Every indication is that it is fly by wire that would explain the throttle stick position sensor mentioned in his previous post. Would also explain the code he is getting
2005 mobius lsv 2900lbs ballast2005 mobius lsv
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08-20-2012, 04:48 PM #45Senior Member
- Join Date
- Jun 2010
- Location
- Lake Houston
- Posts
- 656
Thats why its giving the ETC fault. The throttle % open is not matching up to what the MAF sensor is seeing for airflow. Its a safety feature so that you can't put more air in the engine than is required. So the ecm is backing off ignition and timing causing the motor not to run right because it thinks there's more air getting in the cylinders than there actually is.
Last edited by lewisb13; 08-20-2012 at 04:51 PM.
2013 LSV
2005 LSV - SOLD
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08-20-2012, 05:19 PM #46Senior Member
- Join Date
- Jun 2010
- Location
- Lake Houston
- Posts
- 656
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08-20-2012, 05:34 PM #47
Just wouldn't give an etc code on a mechanical throttle body setup. Not possible unless some catastrophic software failure occurred. Push the throttle plate open with your finger and check for corrosion on the inside of the throttle body neck or debris. Also the plate should move smoothly. Etc problems are common on gm vehicle and is mostly due to dirt or debris from lack of cleaning.
2005 mobius lsv 2900lbs ballast2005 mobius lsv
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08-20-2012, 05:35 PM #48
There is also a throttle relearn procedure that the fly by wire t body has to go through
2005 mobius lsv 2900lbs ballast2005 mobius lsv
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08-21-2012, 08:49 AM #49
Santi, take a lot of pictures of the throttle body, inside and out on your boat and post them here so we can see what kind of setup you have.
Hopefuylly you have a better camera to use than your last picture as it is too blurry.
En Espanol:
Santi, tomar muchas fotografías del cuerpo del acelerador, dentro y por fuera en su bote y publicarlos aquí para que podamos ver qué tipo de configuración que tienes.
Esperemos que tiene una cámara mejor de usar que su última imagen como es demasiado borrosa.2017 Moomba Craz
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08-21-2012, 11:01 AM #50Junior Member
- Join Date
- May 2008
- Posts
- 23
Stazi, thanks for pdf, I knew.
Why are not any of the Indmar techs helping this poor guy out on here?.
Apparently not.
I've sent an email to Idnma with the recording of Diacom, after being fighting with the program, we have “learned to handle it”, but to this day I have not said anything. And I do not understand why not help me ....
The boat has only 360 hours .... but I will look if it has any dirt or debris.
ga-lsv05 , please do not understand this: There is Also a throttle relearn procedure that the fly by wire t body has to go through.
Can you put in other words? Thank you.
lewisb13 said, Forgive me for not knowing the answer to this.
Any help is good for me, thank you very much for answering.
Stazi, this weekend I'll go back to the lake and makes photos with a better camera or video.Thanks.
Here in Spain there are three company working with Indmar engines.
1. - World Quality Tech only Malibu Boats
2. - Magic Estadi only Mastercraft Boats.
3. - Wakextreme Moomba and Supra.
I still hope they (Wakextreme Company) comes to chekear me boats.
Two years ago I went through the first time this problem and in the end I had to buy the Diacom program and the plug, and I chekear my boat together with a car mechanic.
Here in Spain cost a lot to have a boat on a lake and I'm wasting time, money and the worst I can do wakeboarding.
Thanks a all.Last edited by santi; 08-21-2012 at 11:05 AM.