AHU "GQ" ECU v135 and G20 code .

davidgylland

Member
Joined
Jan 28, 2022
Location
ontario
TDI
1997 passat
I have read at more then one place that the GQ ecu was used in a service campaign to eliminate the 5th injector.

i have seen the following thread https://forums.tdiclub.com/index.php?threads/96-passat-ecu-with-last-2-letters-bk.83021/

however I unsure, how to proceed. do anyone know why my vehicle would have these codes with the ecu I have? I have confirmed the wiring does not have the pins for the components required for the items identified in the codes.

VCDS-Lite Version: Release 1.2
Friday, 04 February 2022, 18:34:35:64425


Chassis Type: 3A - VW Passat B4
Scan: 01,02,03,08,15,25,41

-------------------------------------------------------------------------------
Address 01: Engine Labels: 028-906-021-AHU.LBL
Controller: 028 906 021 GQ
Component: 1,9l R4 EDC G00SG 1420
Coding: 00002
Shop #: WSC 04722
VCID: 64BBD43AE743
2 Faults Found:
00310 - CAT Temperature Sensor 1 (G20)
30-00 - Open or Short to Plus
00309 - Washer Solution Metering Pump (V135)
31-10 - Open or Short to Ground - Intermittent
Readiness: N/A

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 3A0-907-379.LBL
Controller: 3A0 907 379 A
Component: ABS/EDS ITTAE 20 GI V00
Coding: 04505
Shop #: WSC 00000
VCID: 2823800ADBEB
No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 6N0-909-60x-VW2.LBL
Controller: 6N0 909 603 G
Component: AIRBAG VW2 V00
Coding: 00071
Shop #: WSC 05311
VCID: 361F5E72015F
No fault code found.
 

davidgylland

Member
Joined
Jan 28, 2022
Location
ontario
TDI
1997 passat
if anyone has any info on the service bullentin that covered the smoke fix that deactivated the 5th injector it would be appricated, as mine did not have wire in the harness for any sensors or pump? assume removed at production. and maybe the previous owne replaced the ecu with wrong mod status ? however to fix my issue i pinned the socket 10 ran it thru a 300 ohm resiter to ground and pinned socket 27 and ran it thru 10 ohm ceramic resistor to power to remove the DTC codes. again however if anyone has any info it would be appricated.
 
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