Bad Alternator / Battery died while driving

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Should be low 14s
Your voltage regulator on the alternator is probably toast.
 

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Or you have crappy wires\connections..... test the output at the alternator instead of at the battery to see if your cables\connections are the potential issue.... start doing voltage drop tests and isolate your issue.
 

Mozambiquer

Vendor , w/Business number
Joined
Mar 21, 2015
Location
Versailles Missouri
TDI
1998 VW Jetta TDI. 1982 VW Rabbit pickup, 2001 VW Jetta TDI, 2005 VW Passat wagon TDI X3, 2001 VW golf TDI, 1980 VW rabbit pickup,
Just battery tested now….Multimeter showed the batt at 12.1 after sitting overnight. 13.6 after I started and had it running.
What brand alternator did you install? That is low, though not extremely low. It should be around 14 volts. 13.5 is the minimum.
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
brand new bosch alternator.

So just to switch gears a little I changed the oil and the fuel filter (were due). Took it our for a spin and now I have a new code to add. All others the same. Still low power mode. Drives "fine" just doesn't accelerate as normal.... doesn't rev past 3000

Tough time getting the connector off the MAF (broken tab) and the MAP sensor (tough location to try and remove) to inspect but i will keep trying.

Also will do the volt drop test. I did those prior to the alt change and didnt find anything abnormal.

000275 - Intake Air Temp. Sensor (G42)
P0113 - 000 - Signal too High - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 246699 km
Time Indication: 0
Date: 2063.14.31
Time: 12:46:53

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Temperature: 134.1°C
Pressure: 2190.1 mbar
(no units): 0.0
(no units): 3.97
Temperature: 35.1°C
 
Last edited:

Tdijarhead

Top Post Dawg
Joined
Nov 10, 2013
Location
Lawrenceville PA
TDI
2003 TDI Jetta Daughters Car, 2001 TDI Beetle, Daughters car, 2005 Golf TDI Mine, all 5 spds
If I went out to my car and put a multimeter on my battery and it showed 12.1 I would put my battery charger on it and start checking things to see if I had a problem with the charging system. If the battery was several years old I would replace it. Obviously yours is new, take care of whatever it is that's causing a new battery to read 12.1 before you chase all these codes down some of which could be caused by a low battery.

With what you have described I'd say you have a crappy new alternator that needs replacement already.
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
With what you have described I'd say you have a crappy new alternator that needs replacement already
This is a bummer of a thought and I smite you for saying. Lol..

frankly I just don’t think that’s it. The old alt provided zero charge letting the battery die which caused all the codes. Prior to replacement, there was no low power mode. It is now present after. The new alt at least provides charge. I have a battery charger with an alternator test setting. It says good alternator (said bad with with old alt) and I also dont have the battery light anymore. I do understand the voltages are not as they should be though. Tomorrow I’ll get after it some more.

Just don’t understand why, if the throttle actuator needed cleaning, why did it not present until the battery problem? Prior to the battery issue car ran great, no problems, happy as can be. Same with the other codes.

Again, thanks for all the tips and ideas.
 

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Requiring cleaning was only a potential solution.... The plastic gears in its mechanism may have stripped, or the internal pot might've burned out, etc. Maybe it is partially blocked and with the old alt and low battery it didn't have enough grunt to break and now that it got full juice something busted..... We can throw all kinds of theories around or you can start doi g some actual troubleshooting and mechanical disassembly.
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
We can throw all kinds of theories around or you can start doi g some actual troubleshooting and mechanical disassembly.
You certainly don’t mince words Turbo…. But you’re not wrong. I don’t love ripping cars apart so I like to think it all through so I don’t waste time and energy. I’ve developed a bias toward the problem being electrical so I’ve been hesitant to start pulling hard parts out. But it looks likely. Like I said, I’ll get after it tomorrow, after I whine some more…
 

Tdijarhead

Top Post Dawg
Joined
Nov 10, 2013
Location
Lawrenceville PA
TDI
2003 TDI Jetta Daughters Car, 2001 TDI Beetle, Daughters car, 2005 Golf TDI Mine, all 5 spds
Have you put your multimeter directly on the bolt at the back of the alternator where the big battery cable is fastened while the car is running? Doing that will tell you exactly how many volts the alternator is putting out. Whatever the reading at that bolt you should be getting the exact same reading at the other end of that cable where it connects to the battery.

If there is a difference then it could be a loose connection or degraded cable.
 

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Have you put your multimeter directly on the bolt at the back of the alternator where the big battery cable is fastened while the car is running? Doing that will tell you exactly how many volts the alternator is putting out.
I asked about that above in #12.

I don’t love ripping cars apart so I like to think it all through so I don’t waste time and energy. I’ve developed a bias toward the problem being electrical so I’ve been hesitant to start pulling hard parts out.
I appreciate your effort to brainstorm the problem with those of us that are trying to help and guide you, but as I've mentioned in several replies, you haven't really done much other than hope and pray to fix or troubleshoot anything. You will end up kicking yourself once you clog up your DPF or whatever other headache you cause yourself by continuing to operate the vehicle under limp mode conditions.

Have you done output tests on the suspect valve?
If they failed, have you put a meter on the connector to see if it's getting signal or not?
Have you logged the IAT signal if it's throwing a code to see what it reads? A broken sensor or connection can sometimes just read high all the time... whatever the log says can provide very useful clues.

Also, something is fishy about all your codes. Your Freeze Frame Data shows the engine is not running and the vehicle isn't moving.... didn't you just say that you took it out for a drive and it re-generated all these codes after you cleared them? :unsure:
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
So finally got the throttle valve actuator off the car. Didn't look too dirty at all. No crusty buildup, just some gunk on the sides. The connector is damaged a little so I just decided to order a new part to eliminate that problem. Replaced the "A" block fuse strip on the front of the eBox as well. Trying to get the MAP sensor off since I have a new one but that'll happen tomorrow.

Tested the connector to the throttle actuator valve and got 5v on pins 2,3,4. and less then 1v on pin 1. I may not have tested correctly but I put red lead on the pin and black to ground.

Once the new part gets here I'll put it back together and see what I get.
 

Dannyboy

Veteran Member
Joined
May 25, 2013
Location
Mb
TDI
2014
Tested the connector to the throttle actuator valve and got 5v on pins 2,3,4. and less then 1v on pin 1. I may not have tested correctly but I put red lead on the pin and black to ground.
Motor should be 12v , can't remember off top of my head but I'm pretty sure on the feedback loops one should be high and other should be low.
Sometimes the motor brushes wear out, they have a finite lifespan. Like staters, they just can't provide the torque required to do their job correctly when they wear
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
replaced the throttle body unit.... no change. Car still low power mode. same codes.

Tried to do output test on the MAP sensor... there seems to be no option to do so.

Throttle adaptation does nothing at all. No output, no sound from unit.

Visually inspected every fuse in the car....none blown

Visually inspected wiring that I was able to see and trace... nothing broken/loose/corroded/or falling apart.

Tried to test connector with multimeter, but frankly, I am unsure of the proper process to test a connector across the pins.

All other functions in car work fine...(lights, power stuff in the interior, windows.....)

Latest full scan below.
\
Monday,20,December,2021,14:40:52:42997
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 21.9.0.2 (x64)
Data version: 20210903 DS330.0
www.Ross-Tech.com


VIN: 3VWRL7AJxxxxxxxxxxx License Plate:
Mileage: 246710km-153298mi Repair Order:



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: AJ-VW36 (1K0)
Scan: 01 02 03 08 09 15 16 17 19 25 2E 37 42 44 46 52 56 62 65 72
77

VIN: 3VWRL7Axxxxxxx Mileage: 246710km-153298miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
2E-Media Player 3 -- Status: OK 0000
37-Navigation -- Status: Malfunction 0010
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: Malfunction 0010
56-Radio -- Status: Malfunction 0010
62-Door, Rear Left -- Status: OK 0000
65-Tire Pressure -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine (CJA) Labels: 03L-906-022-CBE.clb
Part No SW: 03L 997 030 K HW: 03L 906 022 TS
Component: R4 2.0l TDI G001AG 9983
Revision: 12H03--- Serial number:
Coding: 0050078
Shop #: WSC 23303 444 85640
VCID: 364DC40841E08839AB-8062
VINID: 0E69E270745A1D17411011C2105AFB2326

3 Faults Found:
008449 - Throttle Valve Actuator Control System
P2101 - 000 - Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 246719 km
Time Indication: 0
Date: 2016.05.12
Time: 00:35:28

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Voltage: 12.16 V
Lambda: 99.4 %
Bin. Bits: 00000000

000568 - Manifold Pressure / Boost Sensor (G31)
P0238 - 000 - Signal too High - MIL ON
Freeze Frame:
Fault Status: 11100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 246719 km
Time Indication: 0
Date: 2016.05.12
Time: 00:35:29

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Voltage: 12.16 V
Pressure: 1004.3 mbar
Pressure: 2190.1 mbar
Temperature: 2.7°C
Temperature: 13.5°C

008450 - Throttle Valve Actuator Module (J338): Motor Circuit
P2102 - 000 - Signal Low - MIL ON
Freeze Frame:
Fault Status: 11100000
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 246719 km
Time Indication: 0
Date: 2016.05.12
Time: 00:35:29

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Load: 0.0 %
Load: 100.0 %
Lambda: 99.4 %
Mass Air / Rev.: 0.0 mg/str
Temperature: 60.3°C

Readiness: 0 0 0 1 1

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 02E-927-770.clb
Part No SW: 02E 300 052 T HW: 02E 927 770 AL
Component: GSG DSG AG6 511 9037
Revision: 51112 Serial number: 00001003252070
Coding: 0000020
Shop #: WSC 00066 000 00000
VCID: 256F1344EC46F3A112-8070

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels:. 1K0-907-379-60EC1F.clb
Part No SW: 1K0 907 379 AJ HW: 1K0 907 379 AJ
Component: ESP MK60EC1 H30 0107
Revision: 00H30001
Coding: 114B400C492600FB881202E6921D0042310000
Shop #: WSC 00066 000 00000
VCID: 7AD51038F578AC590F-802E

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J301) Labels:| 3C8-907-336.clb
Part No SW: 3C8 907 336 AJ HW: 3C8 907 336 AJ
Component: Climatic H14 0305
Revision: 00009001
Coding: 0000001002
Shop #: WSC 00066 000 00147
ASAM Dataset: EV_Climatic A01005
ROD: EV_ClimaBasis_VW36.rod
VCID: 75CF0304D466C32162-8020

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 1K0-937-08x-09.clb
Part No SW: 5K0 937 085 G HW: 5K0 937 085 G
Component: BCM PQ35 B++ 111 2129
Revision: BI111001
Coding: 25200B3E902F3EE4800800854000000401000086510085605C8020000000
Shop #: WSC 41850 001 1048576
VCID: 3753C90C86EA7131B0-8062

Subsystem 1 - Part No: 1K1 955 119 F Labels: 1KX-955-119.CLB
Component: Wischer 26051 23 0512
Coding: 009795

1 Fault Found:
02092 - Enabling Heated Seat
009 - Open or Short to Ground
Freeze Frame:
Fault Status: 01101001
Fault Priority: 5
Fault Frequency: 8
Reset counter: 213
Mileage: 246713 km
Time Indication: 0
Date: 2016.05.12
Time: 16:35:30

Freeze Frame:
Term 15 On
Voltage: 13.65 V
ON
ON
OFF
OFF
OFF


-------------------------------------------------------------------------------
Address 15: Airbags Labels: 1K0-909-605.lbl
Part No SW: 1K0 909 605 AD HW: 1K0 909 605 AD
Component: 04 AIRBAG VW8R 036 8900
Revision: 06036000 Serial number: 003EVM02Z4VD
Coding: 0012340
Shop #: WSC 00066 000 00000
VCID: 6EFD2C687930F0F9A3-803A

Subsystem 1 - Part No: 1K0 959 339 H
Component: BF-Gewichtsens. 007 0006

Subsystem 2 - Serial number: 6332MSME51660F1FK

Subsystem 3 - Serial number: 6342MSME50356017%

Subsystem 4 - Serial number: 6351HSME2129494DB

Subsystem 5 - Serial number: 6361HSME21050033P

Subsystem 6 - Serial number: 63727SME2061356C

Subsystem 7 - Serial number: 63827SME20611D47

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 1K0-953-549-MY9.lbl
Part No SW: 1K0 953 549 CD HW: 1K0 953 549 CD
Component: J0527 056 0111
Coding: 0001731
Shop #: WSC 00066 000 00000
VCID: 76CD04080160C8396B-8022

Subsystem 1 - Part No: 5K0 959 542 Labels: 3C8-959-537.CLB
Component: E221__MFL-TAS H05 0010
Coding: 00000130
Shop #: WSC 00000

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:| 5K0-920-xxx-17.clb-SRI1
Part No SW: 5M0 920 970 G HW: 5M0 920 970 G
Component: KOMBI H05 0305
Serial number: 00000000000000
Coding: 271F00
Shop #: WSC 00066 000 00147
ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04052
ROD: EV_Kombi_UDS_VDD_RM09_004_VW36.rod
VCID: 3449FE009F9C9A2995-8060

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels:. 1K0-907-530-V4.clb
Part No SW: 1K0 907 530 AD HW: 1K0 907 951
Component: J533 Gateway H07 0112
Revision: H07 01 Serial number: 080510F2002169
Coding: ED807F07400612001002
Shop #: WSC 00066 000 00000
VCID: 69F75F7440DE17C1F6-803C

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer (J334) Labels:| 5K0-920-xxx-25.clb
Part No SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H05 0305
Serial number:
Coding: 000000
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03005
ROD: EV_Immo_UDS_VDD_RM09_VW21.rod
VCID: 6AF520788DD81CD9FF-803E

No fault code found.

-------------------------------------------------------------------------------
Address 2E: Media Player 3 (J650) Labels:. 5N0-035-342.lbl
Part No SW: 5N0 035 342 B HW: 5N0 035 342 B
Component: SG EXT.PLAYER H13 0090
Revision: A1001003 Serial number: 7667917019
Coding: 010000
Shop #: WSC 00066 000 00000
VCID: 266D14485140F8B91B-8072

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation (J0506) Labels:. 1T0-035-680.clb
Part No SW: 3C0 035 684 C HW: 3C0 035 684 C
Component: RNS-MID H06 1000
Revision: AB001001 Serial number: VWZ6Z7K6102078
Coding: 040004000400008600
Shop #: WSC 23303 444 105071
VCID: 236B0D5C22720D917C-8076

1 Fault Found:
02635 - Tuner Not Enabled/Activated
000 - -
Freeze Frame:
Fault Status: 01100000
Fault Priority: 7
Fault Frequency: 35
Reset counter: 213
Mileage: 246672 km
Time Indication: 0


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386) Labels:| 3C0-959-70X-GEN4.clb
Part No SW: 3C0 959 701 B HW: 3C0 959 793
Component: TUER-SG FT 002 0307
Revision: 13101005 Serial number: 0000868789
Coding: 0004B5
Shop #: WSC 01383 790 50316
ASAM Dataset: EV_DCU42BroseDriveSide A03004
ROD: EV_DCU42BroseDriveSide.rod
VCID: 2773194C5E4AE1B120-8072

Slave Driver:
Subsystem 1 - Part No SW: 1K0 959 703 AH HW: 1K0 959 795 T Labels: 1K0-959-70X-GEN4.CLB
Component: J388__TSG-HL 006 1401
Serial number: 00000004892847
Coding: 000490

1 Fault Found:
66048 - Motor for Front Window Regulator
B11EC 54 [008] - Missing Calibration / Basic Setting
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 7
Fault Frequency: 2
Reset counter: 253
Mileage: 246673 km
Date: 2021.12.20
Time: 00:44:50


-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 1K0-909-14x-GEN3.clb
Part No: 1K0 909 144 J
Component: EPS_ZFLS Kl. 70 3001
Revision: 00H17000
Shop #: WSC 02069 000 90108
VCID: 3147F714A88EAF01FE-8064

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387) Labels:| 3C0-959-70X-GEN4.clb
Part No SW: 3C0 959 702 B HW: 3C0 959 792
Component: TUER-SG BT 002 0307
Revision: 15101005 Serial number: 0000890424
Coding: 0004B4
Shop #: WSC 01383 790 50316
ASAM Dataset: EV_DCU52BrosePasseSide A03004
ROD: EV_DCU52BrosePasseSide_VW32.rod
VCID: 28711A705354EEC929-807C

Slave Passenger:
Subsystem 1 - Part No SW: 1K0 959 704 AH HW: 1K0 959 794 T Labels: 1K0-959-70X-GEN4.CLB
Component: J389__TSG-HR 006 1401
Serial number: 00000004924807
Coding: 000490

1 Fault Found:
66048 - Motor for Front Window Regulator
B11EC 54 [008] - Missing Calibration / Basic Setting
Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 7
Fault Frequency: 1
Reset counter: 253


-------------------------------------------------------------------------------
Address 56: Radio (J0506) Labels:. 1T0-035-680.clb
Part No SW: 3C0 035 684 C HW: 3C0 035 684 C
Component: RNS-MID H06 1000
Revision: AB001001 Serial number: VWZ6Z7K6102078
Coding: 040004000400008600
Shop #: WSC 23303 444 105071
VCID: 236B0D5C22720D917C-8076

1 Fault Found:
02635 - Tuner Not Enabled/Activated
000 - -
Freeze Frame:
Fault Status: 01100000
Fault Priority: 7
Fault Frequency: 35
Reset counter: 213
Mileage: 246672 km
Time Indication: 0


-------------------------------------------------------------------------------
Address 65: Tire Pressure (J502) Labels:. 1K0-937-08x-65.clb
Part No SW: 5K0 937 085 G HW: 5K0 937 085 G
Component: RDK 111 0821
Coding: 018705
Shop #: WSC 00066 000 00000
VCID: 3753C90C86EA7131B0-8062

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone Labels: 5P0-862-335.lbl
Part No SW: 1Z0 035 729 E HW: 1Z0 035 729 E
Component: FSE_2P8x H40 0190
Revision: 00000000 Serial number: 00000005243855
Coding: 0013077
Shop #: WSC 00066 000 00000
VCID: 3A55D03875F86C594F-806E

No fault code found.

End-------------------------(Elapsed Time: 02:16)--------------------------
 
Last edited:

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
Have you done output tests on the suspect valve
Cant find an option to do so for the MAP sensor

Your Freeze Frame Data shows the engine is not running and the vehicle isn't moving.... didn't you just say that you took it out for a drive and it re-generated all these codes after you cleared them?
Auto Scan done with the car not running/key on after taking for a drive. Would it show RPM when not running on the scan? Codes show up immediately after clearing/key off/key back on. The first engine code will return immediately after clearing before key off.
 

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Cant find an option to do so for the MAP sensor
It's a sensor, it only takes measurements. You can log the readings it takes. You can't run an output test on something that can't be actuated like a motor, valve, switch, etc.

Auto Scan done with the car not running/key on after taking for a drive. Would it show RPM when not running on the scan? Codes show up immediately after clearing/key off/key back on. The first engine code will return immediately after clearing before key off.
Focus on FREEZE
It takes a SNAPSHOT of the parameters when the subject error first occurs.

Based on what you're saying, if you clear the codes and just cycle the ignition, without even going for a drive, they should all still come back.
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
Gotcha. Makes sense. Can anyone help me with testing the connectors to see if I am getting power to the unit? It’s a 4 pin…
 

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
I already tried to help you, but you're not reading eff all I'm posting....
Did you read post #23 that gives you the pinout?
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
Have you put your multimeter directly on the bolt at the back of the alternator where the big battery cable is fastened while the car is running?
The bolt on the alt shows 14.1v with red on that bolt and black lead on the neg batt term.
Across the battery, it shows 13.92. Is that a big enough discrepancy to cause the problems?

I am getting 4.8v when testing across pins 1 & 2 on the connector to the Throttle actuator valve. Wiring diagram shows pin 1 as grnd and pin 2 as going through the fuse (good) and on to the battery. Other two pins go to ECU. Should I be getting 12v at the connector? Or is the 5v correct? (Bentley manual wiring diagrams don't show voltage as Turbo's diagram does.) The part is brand new and is not making any sort of movement (i get the same codes whether the connector is on or not, car running or not).

Can't test the G31 connector right now as I have to tear the other parts out to get to it.

I already tried to help you, but you're not reading eff all I'm posting
I'm sorry you feel I'm not doing the things you are advising me to do... I do feel that I am though, so I'm unsure of your exasperation here .

Thx for the help...again..
 

Mozambiquer

Vendor , w/Business number
Joined
Mar 21, 2015
Location
Versailles Missouri
TDI
1998 VW Jetta TDI. 1982 VW Rabbit pickup, 2001 VW Jetta TDI, 2005 VW Passat wagon TDI X3, 2001 VW golf TDI, 1980 VW rabbit pickup,
The bolt on the alt shows 14.1v with red on that bolt and black lead on the neg batt term.
Across the battery, it shows 13.92. Is that a big enough discrepancy to cause the problems?

I am getting 4.8v when testing across pins 1 & 2 on the connector to the Throttle actuator valve. Wiring diagram shows pin 1 as grnd and pin 2 as going through the fuse (good) and on to the battery. Other two pins go to ECU. Should I be getting 12v at the connector? Or is the 5v correct? (Bentley manual wiring diagrams don't show voltage as Turbo's diagram does.) The part is brand new and is not making any sort of movement (i get the same codes whether the connector is on or not, car running or not).

Can't test the G31 connector right now as I have to tear the other parts out to get to it.


I'm sorry you feel I'm not doing the things you are advising me to do... I do feel that I am though, so I'm unsure of your exasperation here .

Thx for the help...again..
That diagram is for the g31, not the asv.(throttle valve)
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
Yes.. I was tracking that. Tested the asv because it's right there and that's the part I know as good.

If Turbo isn't too irritated with me I would love to see the the ASV. Throttle actuator valve diagram from his source.

That diagram is for the g31, not the asv.(throttle valve)
 
Last edited:

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
is this wiring diagram available to the masses or just special access? This shows different info from the Bentley manual I have. Granted the bentley manual only shows info from the 2.0L CR TDI CBEA
 

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
I'm sharing from my private collection. Go to Erwin, pay for 24 hr access and download all the specifics you want on whatever you want .... It's low cost and excellent value.
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
Paid for the 24 hrs... been trying to download the wiring diagrams... they just aren't working. Page keeps erroring out or failing or just plain not allowing the download...or even viewing. I've emailed cust support
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
Finally got it to download. I cant find any page that is similar to what you have provided. Specifically, yours shows the G69 TPS and the J338 Throttle valve control module as the same unit. I cant verify that in the diagrams that I downloaded. They look more similar to the Bentley manual. (Searched by vin and manually using year/model/...)

Anyways, thx for the tips and hope you all are having a good holiday. Finally snowed today here in the Pacific NW
 

TurboABA

Veteran Member
Joined
Jul 24, 2010
Location
Kitchener, ON
TDI
RIP-2010 Jetta 6spd 2014 Touareg Execline
Well I didn't make up the info that I shared so not sure what you're saying. That diagram comes from the version that I have for a CJAA engine. What did you download?
 

kingbri1

Well-known member
Joined
Jun 27, 2012
Location
Olympia, WA
TDI
2010 Jetta TDI
Well, just thought I'd bring this thread to complete. Car is back to working and running as normal, no fault codes.

As I thought the problem was to do with the electrical system and I didn't have the know-how (nor the desire) to start tracing and tracking electrical connections I took it to the VW dealer to diagnose.

Their original diagnosis was bad electrical connections and they ordered a replacement harness ( 1K0971349CD ) to install.

Upon installing this new harness, the problem remained. After more troubleshooting with VW they realized that the connectors for MAP sensor and the Throttle actuator ( j338 ) had somehow been swapped. There was only 4.5 volts getting to terminal 2 on the throttle body actuator valve when there should have been battery voltage. Since this meant that battery voltage was now getting to the MAP sensor, that sensor was now fried since it should only be getting 5 volts. They placed likely blame on the local shop that replaced the alternator and the battery. Which makes sense since those connections would have had to been removed to replace the Alternator. Once the MAP sensor was replaced, and with all connections going to the right place, all problems and codes were resolved.

The Dealer ended up not charging me for labor to install the harness since it was not the problem (swapped connections was) and gave me a free rental car while it was being fixed. This is one time when the local shop was wrong and the dealer was awesome.

So that wraps it up. I thank everyone for there help with this situation.
 

Dannyboy

Veteran Member
Joined
May 25, 2013
Location
Mb
TDI
2014
Well that explains it, I didn't even think map and throttle connections were the same but there you go.
Thank you for following through with the reply with the solution as it may help someone down the road if they have this issue. Happy motoring!
 
Top