Volkswagen Passat Forum banner

P1678 Drive By Wire MIL Circuit Short To Ground

998 Views 4 Replies 2 Participants Last post by  mjmorrill
I had to R and R my instrument cluster and now I am trying to clear the EPC lamp. The code is P1678. ( I also have a P1690 with no CEL) When I go to clear it while car is running it will disappear for a moment, then right back on. Iv'e tried most everything I could do. Any suggestions? Thanks!! :banghead:
1 - 4 of 5 Posts
-------------------------------------------------------------------------------
Address 17: Instruments Labels: 3B0-920-xx2-17.lbl
Part No: 3B0 920 920 B
Component: B5-KOMBIINSTR. VDO V26
Coding: 07245
Shop #: WSC 05311
VCID: 1D31A5C197814AAE81-515E

5 Faults Found:
00771 - Fuel Level Sensor (G)
30-10 - Open or Short to Plus - Intermittent
00779 - Outside Air Temp Sensor (G17)
30-10 - Open or Short to Plus - Intermittent
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01321 - Control Module for Airbags (J234)
49-10 - No Communications - Intermittent
01315 - Transmission Control Module
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 6N0-909-901-19.lbl
Part No: 6N0 909 901
Component: Gateway K<->CAN 0001
Coding: 00005
Shop #: WSC 05314
VCID: 70EFAC75309397C67A-515E

3 Faults Found:
01314 - Engine Control Module
49-10 - No Communications - Intermittent
01321 - Control Module for Airbags (J234)
49-10 - No Communications - Intermittent
01315 - Transmission Control Module
49-10 - No Communications - Intermittent

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 1J0-959-799.lbl
Part No: 1J0 959 799 AJ
Component: 6W Zentral-SG Komf. 0001
Coding: 04096
Shop #: WSC 05311
VCID: 0603EAAD2217A976B0-4B00

Subsystem 1 - Part No: 1J1959801D
Component: 6W Tõrsteuerger. FS0002

Subsystem 2 - Part No: 1J1959802E
Component: 6W Tõrsteuerger. BF0002r

Subsystem 3 - Part No: 1J4959811D
Component: 6W Tõrsteuerger. HL0002r

Subsystem 4 - Part No: 1J4959812D
Component: 6W Tõrsteuerger. HR0002r

5 Faults Found:
00955 - Key 1
09-10 - Adaptation Limit Surpassed - Intermittent
01179 - Incorrect Key Programming
35-00 - -
00943 - Heated Exterior Mirror; Driver Side (Z4)
35-00 - -
01358 - Internal Central Locking Switch; Driver Side (E150)
27-10 - Implausible Signal - Intermittent
00944 - Heated Exterior Mirror; Passenger Side (Z5)
35-00 - -

End-------------------------(Elapsed Time: 04:49)--------------------------
See less See more
Thanks Tom, that was the conclusion I came to as well. Since I may have knocked them loose,or momentarily undid the connections, would clearing all the faults on each address one at a time help? I could see me with my oversize hands knocking something, but why would it still run like so good? I will let you know what I find.
Al fixed, i dropped the bottom cover and just pressed every connection, fuse, and relay. i then cleared every controller that showed a fault. Now no codes, 200 mile trip. All is good. Thanks to Tomvw for his suggestion.
1 - 4 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top