17656 - Start of Injection Timing Regulation

[khaledabdulaziz]

Hello all
I have a VW Caravelle T4 2.5L acv Van
I feel a loss of power at high engine speed and the engine sometimes difficult to start
I have an auto-scan for the van, I know the problem around fuel pump since the timing is somehow wrong
here the auto-scan

Thursday,18,March,2021,11:18:18:04619
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 21.3.0.0 (x64)  HEX-V2 CB: 0.4543.4
Data version: 20210226 DS325.0
www.Ross-Tech.com


VIN: WV2ZZZ70Z3H072256   License Plate:


Chassis Type: 70 (7D - VW Transporter/Multivan (1996 > 2004))
Scan: 01 02 03 08 15 17 18 19 22 25 35 37 56

VIN: WV2ZZZ70Z3H072256 
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 074-906-018-ACV.lbl
   Part No: 074 906 018 AL
   Component: 2,5l R5 EDC 0000SG  3906
   Coding: 00002
   Shop #: WSC 02757
   VCID: 6099A6BB035283BBEF3-4B7A
   WV2ZZZ70Z3H072256     VWZ1Z0B2287109

3 Faults Found:
19561 - Valve for Intake Manifold Flap (N239)
            P3105 - 35-10 - Open or Short to Ground - Intermittent
16955 - Brake Switch (F)
            P0571 - 35-10 - Implausible Signal - Intermittent
17656 - Start of Injection Timing Regulation
            P1248 - 35-10 - Control Deviation - Intermittent
Readiness: N/A

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8E0-614-111-EDS.lbl
   Part No: 7D0 614 111 B
   Component: ABS/EDS 5.3         D00
   Shop #: BB 24258
   VCID: 1B63D1576AB4E0637A1-5260

2 Faults Found:
00283 - ABS Wheel Speed Sensor; Front Left  (G47)
            35-00 - -
00532 - Supply Voltage B+
            07-10 - Signal too Low - Intermittent

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 7D0-920-xxx-17.lbl
   Part No: 7D0 920 802 Q
   Component: T4-KOMBIINSTR. VDO V01 
   Coding: 01122
   Shop #: WSC 19411
   VCID: 313F13FF18387A3330D-5160

3 Faults Found:
00562 - Sensor for Oil Level/Temperature (G266)
            30-00 - Open or Short to Plus
00562 - Sensor for Oil Level/Temperature (G266)
            29-10 - Short to Ground - Intermittent
00562 - Sensor for Oil Level/Temperature (G266)
            27-10 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901
   Component: Gateway K<->CAN    0001
   Coding: 00000
   Shop #: WSC 02757
   VCID: 70B9D6FBD3B2333B7F3-5160

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 6X0-953-257.lbl
   Part No: 6X0 953 257
   Component: IMMO                0008
   Coding: 00001
   Shop #: WSC 00530
   VCID: 7DA7FFCF94E04E53E45-4B3C
   WV2ZZZ70Z3H072256     VWZ1Z0B2287109

1 Fault Found:
01176 - Key
            65-10 - Unauthorized - Intermittent

-------------------------------------------------------------------------------
Address 35: Centr. Locks        Labels: 7D0-959-800.lbl
   Part No: 7D0 959 800 B
   Component:    Funksteuergerï؟½t  0002
   Coding: 00001
   Shop #: WSC 02757
   VCID: 2C01028B3F1A17DB03B-4B1E

No fault code found.

End----(Elapsed Time: 02:40, VBatt start/end: 12.4V/12.3V. VIgn 0.0V)------

could someone help me how to inspect it right ?
I remember that the fuel tank did empty once or twice while I was driving and had a friend coming to fill it up for me, could that be the cause of my issue ?
I looked at the TDI timing graph and tried the two acv options given since i dont know exactly what my engine is since there are two acv choices

and here is the second picture

i suspect that the picture one is the right engine

could someone help me how to inspect the N108 solenoid and how to make the timing right

thanks

P.S ; i dont know if iam allowed to post a ross-tech link since i asked them too about the same issue