Scantool v.4 output interpretation
05-06-2008, 06:15 PM
#1
Nordschleife Master
Thread Starter
Scantool v.4 output interpretation
I've been trying to figure out the Scantool (v.4) outputs recently.
(Scantool's very helpful, but I was clueless when it was describing things or making mysterious devices on my car go whir/click/ or ?. And I hated that clueless feeling.
So, like Wilford Brimley's character in "The Thing" -- I've been busy...)
These (below) are my Scantool interpretation results, so far.
Here's where I need help.
Wherever you see question marks, that's a place where I couldn't dig up background info or am unsure of my research.
PLEASE volunteer info where you see errors, holes in logic, or have any further morsels.
My best hope is to make this a community work in progress...
System: Motronic
Test Outputs
ECU Activations? <OK>
(ECU output complete)
Actual Values
ECU Inputs
System: Climate Control
Test Outputs
Servo numbering (below) same as seen on http://porsche964.co.uk/technical/servos.htm (looking to rear of car at servos in front trunk/boot, beneath windshield, numbered from left (Servo 1) to right (Servo 5). All other “left-side”/”right-side” descriptions viewed looking toward front of car.
ECU Activations <OK>
(ECU output complete)
Actual Values
(blank)
….
ECU Inputs
This is the biggest void of info I came upon. Please help fill in this data. I've a feeling it's very important in troubleshooting climate control/fan sensors.
milutintin reports further down: "According to the Workshop manual the "Ecu inputs" (Channels 1-8) for "CCU System" could be:")
(Scantool's very helpful, but I was clueless when it was describing things or making mysterious devices on my car go whir/click/ or ?. And I hated that clueless feeling.
So, like Wilford Brimley's character in "The Thing" -- I've been busy...)
These (below) are my Scantool interpretation results, so far.
Here's where I need help.
Wherever you see question marks, that's a place where I couldn't dig up background info or am unsure of my research.
PLEASE volunteer info where you see errors, holes in logic, or have any further morsels.
My best hope is to make this a community work in progress...
System: Motronic
Test Outputs
ECU Activations? <OK>
# 17: Cylinder 1 Fuel Injector (small clicking sound as it is opened, then closed; repeatedly. [FWIW -- 1,6,2,4,3,5 is the engine's firing order.])
# 16: Cylinder 6 Fuel Injector ‘’
# 35: Cylinder 2 Fuel Injector ‘’
# 34: Cylinder 4 Fuel Injector ‘’
# 15: Cylinder 3 Fuel Injector ‘’
# 33: Cylinder 5 Fuel Injector ‘’
# 4: Idle Speed Control; ISV (big click as activated)
# 5: Tank Venting Valve (big click as activated)
# 23: Resonance Plate (BIG click as activated)
….# 16: Cylinder 6 Fuel Injector ‘’
# 35: Cylinder 2 Fuel Injector ‘’
# 34: Cylinder 4 Fuel Injector ‘’
# 15: Cylinder 3 Fuel Injector ‘’
# 33: Cylinder 5 Fuel Injector ‘’
# 4: Idle Speed Control; ISV (big click as activated)
# 5: Tank Venting Valve (big click as activated)
# 23: Resonance Plate (BIG click as activated)
(ECU output complete)
Actual Values
Intake Air Temp (deg F) [sensor where ?]
Cylinder Head Temp (deg F) [sensor on cylinder head #3]
AFM Voltage (volts)
Rpm (crankshaft revs/minute)
Injector Time (ms) [injector-Open Time during cycle]
Ignition Advance (degrees angle)
Adapted IAC trim (?) [Idle Air Control ??]
124 (7 ch) (?) [signal from Air Flow Sensor ?]
….Cylinder Head Temp (deg F) [sensor on cylinder head #3]
AFM Voltage (volts)
Rpm (crankshaft revs/minute)
Injector Time (ms) [injector-Open Time during cycle]
Ignition Advance (degrees angle)
Adapted IAC trim (?) [Idle Air Control ??]
124 (7 ch) (?) [signal from Air Flow Sensor ?]
ECU Inputs
MAF sensor (V/ohm ratio) [Mass Air flow sensor; s/b between 0 & 1 when open flapper]
Battery (volts) [battery pole voltage]
NTC 1 (ohms) [air temperature sensor]
NTC 2 (ohms) [engine temperature sensor; Cylinder 3 head]
Channel 5 (?) [tank venting valve?]
O2 Sensor (mV?)
FQS (position #) [Fuel Quality (Rotary) Switch in DME, a fuel mixture-to-Timing set pt.]
MAP Sensor 7 (?)
WOT switch (on/off) [Wide Open Throttle microswitch; engaged-on/disengaged-off]
Idle switch (on/off) [Throttle's Idle microswitch; engaged-on/disengaged-off]
….Battery (volts) [battery pole voltage]
NTC 1 (ohms) [air temperature sensor]
NTC 2 (ohms) [engine temperature sensor; Cylinder 3 head]
Channel 5 (?) [tank venting valve?]
O2 Sensor (mV?)
FQS (position #) [Fuel Quality (Rotary) Switch in DME, a fuel mixture-to-Timing set pt.]
MAP Sensor 7 (?)
WOT switch (on/off) [Wide Open Throttle microswitch; engaged-on/disengaged-off]
Idle switch (on/off) [Throttle's Idle microswitch; engaged-on/disengaged-off]
System: Climate Control
Test Outputs
Servo numbering (below) same as seen on http://porsche964.co.uk/technical/servos.htm (looking to rear of car at servos in front trunk/boot, beneath windshield, numbered from left (Servo 1) to right (Servo 5). All other “left-side”/”right-side” descriptions viewed looking toward front of car.
ECU Activations <OK>
Seq. (start): Servo 4; OPEN, Left mixing flap (controls hot & cold air mixing)
Seq. # 1: Servo 4; CLOSE, “
Seq. # 2: Servo 2; OPEN, Right mixing flap (controls hot & cold air mixing)
Seq. # 3: Servo 2; CLOSE, “
Seq. # 4: Servo 1; OPEN, Defroster flap (center nozzle)
Seq. # 5: Servo 1; CLOSE, “
Seq. # 6: Servo 5; OPEN, Footwell flap
Seq. # 7: Servo 5; CLOSE, “
Seq. # 8: Servo 3; OPEN, Fresh air flap
Seq. # 9: Servo 3; CLOSE, “
Seq. # 10: A/C radiator fan; Low speed, (left front fender behind head light)
Seq. # 11: A/C radiator fan; High speed, “
Seq. # 12: Oil radiator fan; Low speed, (right front fender behind head light)
Seq. # 13: Oil radiator fan; High speed, “
Seq. # 14: Primary blower fan; Low, (engine bay, above left side of engine)
Seq. # 15: Primary blower fan; High, “
Seq. # 16: Secondary blower fan; (dashboard; Left side)
Seq. # 17: Secondary blower fan; (dashboard; Right side)
Seq. # 18: A/C radiator fan; Low speed (??? -- I think)
Seq. # 19: no reaction
Seq. # 20: no reaction
….Seq. # 1: Servo 4; CLOSE, “
Seq. # 2: Servo 2; OPEN, Right mixing flap (controls hot & cold air mixing)
Seq. # 3: Servo 2; CLOSE, “
Seq. # 4: Servo 1; OPEN, Defroster flap (center nozzle)
Seq. # 5: Servo 1; CLOSE, “
Seq. # 6: Servo 5; OPEN, Footwell flap
Seq. # 7: Servo 5; CLOSE, “
Seq. # 8: Servo 3; OPEN, Fresh air flap
Seq. # 9: Servo 3; CLOSE, “
Seq. # 10: A/C radiator fan; Low speed, (left front fender behind head light)
Seq. # 11: A/C radiator fan; High speed, “
Seq. # 12: Oil radiator fan; Low speed, (right front fender behind head light)
Seq. # 13: Oil radiator fan; High speed, “
Seq. # 14: Primary blower fan; Low, (engine bay, above left side of engine)
Seq. # 15: Primary blower fan; High, “
Seq. # 16: Secondary blower fan; (dashboard; Left side)
Seq. # 17: Secondary blower fan; (dashboard; Right side)
Seq. # 18: A/C radiator fan; Low speed (??? -- I think)
Seq. # 19: no reaction
Seq. # 20: no reaction
(ECU output complete)
Actual Values
(blank)
….
ECU Inputs
This is the biggest void of info I came upon. Please help fill in this data. I've a feeling it's very important in troubleshooting climate control/fan sensors.
milutintin reports further down: "According to the Workshop manual the "Ecu inputs" (Channels 1-8) for "CCU System" could be:")
Channel 1) [?] Voltage TermX
Channel 2) [?] Inside temperature
Channel 3) [?] Rear temperature
Channel 4) [?] Mixing chamber temperature left
Channel 5) [?] Mixing chamber temperature right
Channel 6) [?] Oil temperature
Channel 7) [?] Evaporator temperature (only H04) H04 is Heating and air conditioning regulator
Channel 8) [?] ?
Switch 1) Off [?]
Switch 2) Off [?]
Channel 2) [?] Inside temperature
Channel 3) [?] Rear temperature
Channel 4) [?] Mixing chamber temperature left
Channel 5) [?] Mixing chamber temperature right
Channel 6) [?] Oil temperature
Channel 7) [?] Evaporator temperature (only H04) H04 is Heating and air conditioning regulator
Channel 8) [?] ?
Switch 1) Off [?]
Switch 2) Off [?]
Last edited by elbeee964; 12-27-2017 at 01:26 PM. Reason: Updated info
10-08-2008, 01:49 PM
#2
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Hi
Great info - very useful, but no replies to the all important question - did you get any info about the data outputs of the CCU - surely it's available - perhaps one is the cabin temp, another the oil cooler temp etc..... ?
Best,
Andy
Great info - very useful, but no replies to the all important question - did you get any info about the data outputs of the CCU - surely it's available - perhaps one is the cabin temp, another the oil cooler temp etc..... ?
Best,
Andy
10-08-2008, 02:59 PM
#3
Nordschleife Master
Thread Starter
...from your keyboard to God's ear! (or, some CCU-savant Rennie's ear.)
I'm still wholly ignorant of what they stand for.
All we lack is that CCU Rosetta stone. Something that's not a brick wall.
...and don't call me Shirley.
I'm still wholly ignorant of what they stand for.
All we lack is that CCU Rosetta stone. Something that's not a brick wall.
...and don't call me Shirley.
11-08-2008, 03:05 AM
#4
Rennlist Member
Strange 965 Scantool Codes
elbeee964,
Great info. I have the interface and its utility made a big jump when I read this.
BTW I was asked to reset an airbag fault on a club member's 92 Turbo today. Of course since this is a CIS car there is no Motronic info but, curiously, although there were a number of stored faults in for the CCU and the one for the Airbag, they all were listed with numbers higher than those in your list and all were tagged as "Unknown fault code". Does anyone know if there was a different numbering scheme for the Turbos?
In any case I was still able to reset the faults but it looks like some more research is required for the Turbo models.
Ciao!
Jim
PCA-CWR VP
Great info. I have the interface and its utility made a big jump when I read this.
BTW I was asked to reset an airbag fault on a club member's 92 Turbo today. Of course since this is a CIS car there is no Motronic info but, curiously, although there were a number of stored faults in for the CCU and the one for the Airbag, they all were listed with numbers higher than those in your list and all were tagged as "Unknown fault code". Does anyone know if there was a different numbering scheme for the Turbos?
In any case I was still able to reset the faults but it looks like some more research is required for the Turbo models.
Ciao!
Jim
PCA-CWR VP
05-03-2009, 11:41 PM
#5
Rennlist Member
Scantool Test Outputs - ABS/Traction Control
I finally hooked up my USB-Serial adapter and connected the Scantool to my new 93 C4. No codes on anything but the Climate Control. Now that I found the list for the CCU test outputs, I will go thru it again and see what is and is not working.
But, the interesting thing I may have discovered...
I tried the "Test Outputs" when on the ABS/Traction Control page, and the system sounded like it was cycling the PDAS locks. Does anyone know what the Test Outputs are actuating? IF it is the PDAS differential locks, this may be the tool to aid with bleeding of the diff locks. My current procedure involves cycling the console switch on - crack bleeders - squirt - close bleeders - cycle switch off - repeat. (and is a RPITA if I do not have a helper to run the switch) The "Test Outputs on ABS/Traction Control cycled the locks at a frequency that would allow me to do the bleeding while remaining under the car. I am surprised no one has mentioned this.
Now, the one that I did NOT try was "Test Output" on "SRS Air Bag" I did not want to experience a test of the air bags.
Any ideas what this might do?
But, the interesting thing I may have discovered...
I tried the "Test Outputs" when on the ABS/Traction Control page, and the system sounded like it was cycling the PDAS locks. Does anyone know what the Test Outputs are actuating? IF it is the PDAS differential locks, this may be the tool to aid with bleeding of the diff locks. My current procedure involves cycling the console switch on - crack bleeders - squirt - close bleeders - cycle switch off - repeat. (and is a RPITA if I do not have a helper to run the switch) The "Test Outputs on ABS/Traction Control cycled the locks at a frequency that would allow me to do the bleeding while remaining under the car. I am surprised no one has mentioned this.
Now, the one that I did NOT try was "Test Output" on "SRS Air Bag" I did not want to experience a test of the air bags.
Any ideas what this might do?
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05-21-2009, 09:32 AM
#10
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Join Date: Jun 2007
Location: Wiltshire, UK
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I finally hooked up my USB-Serial adapter and connected the Scantool to my new 93 C4. No codes on anything but the Climate Control. Now that I found the list for the CCU test outputs, I will go thru it again and see what is and is not working.
But, the interesting thing I may have discovered...
I tried the "Test Outputs" when on the ABS/Traction Control page, and the system sounded like it was cycling the PDAS locks. Does anyone know what the Test Outputs are actuating? IF it is the PDAS differential locks, this may be the tool to aid with bleeding of the diff locks. My current procedure involves cycling the console switch on - crack bleeders - squirt - close bleeders - cycle switch off - repeat. (and is a RPITA if I do not have a helper to run the switch) The "Test Outputs on ABS/Traction Control cycled the locks at a frequency that would allow me to do the bleeding while remaining under the car. I am surprised no one has mentioned this.
Now, the one that I did NOT try was "Test Output" on "SRS Air Bag" I did not want to experience a test of the air bags.Any ideas what this might do?
But, the interesting thing I may have discovered...
I tried the "Test Outputs" when on the ABS/Traction Control page, and the system sounded like it was cycling the PDAS locks. Does anyone know what the Test Outputs are actuating? IF it is the PDAS differential locks, this may be the tool to aid with bleeding of the diff locks. My current procedure involves cycling the console switch on - crack bleeders - squirt - close bleeders - cycle switch off - repeat. (and is a RPITA if I do not have a helper to run the switch) The "Test Outputs on ABS/Traction Control cycled the locks at a frequency that would allow me to do the bleeding while remaining under the car. I am surprised no one has mentioned this.
Now, the one that I did NOT try was "Test Output" on "SRS Air Bag" I did not want to experience a test of the air bags.
Any ideas what this might do?Is your scantool able to connect to your ABS/PDAS controller?
I'm sure mine used to, but now all it does is sit saying "connecting..." and never changes to "connected". I do hear the locks activating while it tries to connect though.
Thanks,
Adam
05-21-2009, 09:40 AM
#11
Rennlist Member
Yes, it shows "connected" - in that it reports any codes (none present on mine). And, I hear the locks activating when I perform the test. I am just unsure what it is doing under Test - if it is just PDAS locks, or if it is doing something with ABS. If it is cycling the PDAS locks, then this will be handy for bleeding of the locks.
03-21-2011, 08:15 AM
#12
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According to the Workshop manual the "Ecu inputs" (Channels 1-8) for "CCU System" could be:
- Voltage TermX
- Inside temperature
- Rear temperature
- Mixing chamber temperature left
- Mixing chamber temperature right
- Oil temperature
- Evaporator temperature (only H04)
H04 is Heating and air conditioning regulator
- Voltage TermX
- Inside temperature
- Rear temperature
- Mixing chamber temperature left
- Mixing chamber temperature right
- Oil temperature
- Evaporator temperature (only H04)
H04 is Heating and air conditioning regulator
