Golf 4, 2000, APF,Sekundärluftpumpe Schaltsignal fehlerhaft | Posts 16+

Hello,

Unfortunately, the update was unsuccessful. The secondary air valve is working correctly. Also, the vacuum source it connects to, and the switching valve located upstream of it.

Surprisingly, nothing is being stored in the error memory anymore.
However, the jerks and extreme misfires are still present. I read somewhere else that it was the engine control unit (ECU) in the end, and I'm just at a loss for what to do now.

Is it possible to read the fuel pressure on a Golf 4 1.6 SR? I couldn't find a matching MWB (Material Safety Data Sheet) for that.

Quote:

Is it possible to read the fuel pressure on a Golf 4 1.6 SR? I couldn't find a matching MWB (Material Safety Data Sheet) for that.

Hello,

Have I missed something, or has anyone posted an engine control unit part number (VAG part number) or at least a scan of it anywhere yet?

Best regards, Rainer.

Here's a current car scan:

Wednesday, December 17, 2014, 20:50:31:58539
VCDS -- A Windows-based VAG/VAS emulator.
VCDS Version: DRV 12.12.3.0
Data as of: 20140910.


Mileage: 137,330 km. Repair order:


Vehicle type: 1J - VW Golf/Bora IV (1998 > 2006)
Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75
76

Mileage: 137,330 km
"Der schnelle braune Fuchs springt über den faulen Hund."
Address 01: Engine Control Module
Label file: DRV\06A-906-033-APF.lbl
Part number: 06A 906 033.
Part: SIMOS33 1.6L 2V 00HS3087
Encoding: 00231
Operating number: WSC 45241
VCID: DCBB97734F2B07E3BFB-515A

No error codes found.
Readiness: 0000 1000

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 03: Brake Electronics Label file: DRV\1J0-907-37x-ESP-F.lbl
Part number: 1C0 907 379.
Component: ESP 20 CAN V005
Encoding: 10241
Operating number: WSC 52410
VCID: E7D1B89F866D543B229-4B18

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 08: Climate Control/Heating Module. Label file: DRV\3Bx-907-044.lbl
Part number: 3B1 907 044 C.
Component: CLIMATRONIC C 0.7.0
Encoding: 01010
Operating number: WSC 01317
VCID: 21456687A8C9EA0B2CD-5284

Sure, here is the translation of the text from German to English:

"1 error found:"
00603 - Actuator motor for footwell/defrost flap (V85)
37-10 - defective - intermittent.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 15: Airbag
Label file: DRV\6Q0-909-605-VW5.lbl
Part number: 6Q0 909 605 A
Part number: 02 AIRBAG VW5 0003
Encoding: 12338
Operating number: WSC 01317
VCID: 356DA2D70C4176ABE05-4B18

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 17: Control panel module Label file: DRV\1J0-920-xx0-17.lbl
Part number: 1J0 920 802 B
Component: COMBINATION INSTRUMENT + TRIP COMPUTER. BOO V23.
Encoding: 01143
Operating Number: WSC 00000
VCID: 2247698BADCFF113357-5178

Subsystem 1 - Part number: Ident
Part number: WEGFAHRS.:VWZ6Z0X1003207
Identification Number: WEGFAHRS.VWZ6Z0X1003207

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 19: Diagnostic interface
Label file: DRV\6N0-909-901-19.lbl
Part number: 6N0 909 901.
Component: Gateway K<->CAN 0001
Encoding: 00006
Operating number: WSC 01317
VCID: F0E3D3C3B3A39383733-5178

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 46: Comfort System Label file: DRV\1J0-959-799.lbl
Part number: 1J0 959 799 Q
Component: 4C Central Control Unit, Comfort Version, 0001.
Encoding: 04097
Operating number: WSC 01317
VCID: 4C9BE7337FCB1763AFB-4B32

Subsystem 1 - Part number: 1J1959801C
Component: 4C Throttle Control Unit. FS0002F

Subsystem 2 - Part number: 1J1959802D
Component: 4C Throttle Control Unit. BF0002r

Subsystem 3 - Part number: 1J4959811C.
Component: 4C Throttle Control Unit. HL0002r

Subsystem 4 - Part number: 1J4959812C
Component: 4C Throttle Control Unit. HR0002H

No error codes found.

End.

There is no measurement block for fuel pressure.

If you click on the blue-highlighted name of the label file within the measurement blocks, the file will open, and you can see what's inside.

Short-term and long-term adaptation of the lambda control system, and the coolant temperature.

We were probably able to identify the problem, even though it's not 100% clear which one it was.

After reviewing the data again, I repeatedly noticed a high temperature reading. Another point was that cylinder 2 was now experiencing misfires.

However, it's normal for the APF (automatic transmission) to have a temperature that's more than 100 degrees Celsius above the coolant temperature, because the thermostat in the APF only opens at 106 degrees Celsius!

However, it was surprising that this value did not decrease and remained relatively constant at 106-108 degrees Celsius.

I replaced the dual coolant temperature sensor as a corrective measure. As a result, the coolant temperature now fluctuates continuously between 96 and 106 degrees.

For cylinder 2, I swapped the cables with those from cylinder 1 for testing purposes, as they have the same length. It's possible that the new cable itself was also faulty, and the problem would have shifted to the other cylinder, but that didn't happen.

The misfires were gone after the two measures were implemented. Another possibility is that the thermostat was stuck inside its housing and that my shaking of the sensor may have dislodged it.

The problem has been resolved for the past few days, at least.