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Discussion Starter #1
So everything was fine and dandy today... Parked the car and come out to it not starting. When I turn the key the only thing that happens is the traction control light comes on for a sec then whole dash goes dark. If I start it, it starts for a sec then shuts itself down similar to anti-theft being triggered. Not asking for guesses yet, just waiting for a tow truck so figured I'd come here to complain haha. Started off today in the 80s, it's now 41f and I'm regretting my choice of shorts and a t-shirt today. I'll run a scan tonight and see what turns up.
 

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Not guessing, but what have you done to the car within the last 3-6 months? Maybe we can find a "smoking gun".
 

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Discussion Starter #4
So went out this morning and she fired right up. Battery was at 11.65 but didnt hesitate to start and 14.5 with the motor running. Windows and dash are working again. My airbag is throwing up a warning now and the light is on. Here's the full scan:

Chassis Type: 3B - VW Passat B5 Scan: 01,02,03,08,15,16,17,19,35,36,37,46,47,55,56,57,58,75,76,77 ------------------------------------------------------------------------------- Address 01: Engine Labels: Redir Fail! Controller: 4B0 906 018 DP Component: 1.8L R4/5VT G 0002 Coding: 0016501 Shop #: WSC 05311 VCID: 729759CB2DB7 2 Faults Found: 18058 - Powertrain Data Bus: Missing Message from Instrument Cluster P1650 - 004 - No Signal/Communication - Intermittent 17978 - Engine Start Blocked by Immobilizer P1570 - 008 - Implausible Signal - Intermittent Readiness: 0000 0000 ------------------------------------------------------------------------------- Address 03: ABS Brakes Labels: 8E0-614-111-ASR.LBL Controller: 3B0 614 111 Component: ABS/ASR 5.3 FRONT D00 Coding: 00022 Shop #: WSC 05314 VCID: D3D97C4F32ED No fault code found. ------------------------------------------------------------------------------- Address 15: Airbags Labels: 6Q0-909-605-VW5.LBL Controller: 1C0 909 605 C Component: 09 AIRBAG VW61 04 0003 Coding: 12345 Shop #: WSC 05311 VCID: 243B6F93A7C3 1 Fault Found: 01299 - Diagnostic Interface for Data Bus (J533) 49-10 - No Communications - Intermittent ------------------------------------------------------------------------------- VCDS-Lite Self-Diagnosis Log Tuesday, 12 November 2019, 10:48:49:0 Page 2 VIN Number: WVWVD63B44E164774 License Plate: Address 17: Instruments Labels: 3B0-920-xx5-17.LBL Controller: 3B0 920 929 B Component: KOMBI+WEGFAHRSP VDO V04 Coding: 15235 Shop #: WSC 25155 VCID: 263F759BD1FF WVWVD63B44E164774 VWZ7Z0C8405564 3 Faults Found: 00779 - Outside Air Temp Sensor (G17) 30-00 - Open or Short to Plus 00476 - Control Module for Fuel Pump (J538) 49-00 - No Communications 01304 - Radio 49-00 - No Communications ------------------------------------------------------------------------------- Address 19: CAN Gateway Labels: 6N0-909-901-19.LBL Controller: 6N0 909 901 Component: Gateway K<->CAN 0001 Coding: 00006 Shop #: WSC 05311 VCID: F093D3C3A3BB 3 Faults Found: 00476 - Control Module for Fuel Pump (J538) 49-00 - No Communications 01304 - Radio 49-00 - No Communications 00463 - Control Module for Digital Sound Package (J525) 49-00 - No Communications ------------------------------------------------------------------------------- Address 46: Central Conv. Labels: 1C0-959-799.LBL Controller: 1C0 959 799 C Component: 0P Komfortgerát HLO 0003 Coding: 00258 Shop #: WSC 05311 VCID: 3701A8DF0655 5 Faults Found: 01299 - Diagnostic Interface for Data Bus (J533) 49-10 - No Communications - Intermittent 00928 - Locking Module for Central Locking; Front Driver Side (F220) 54-00 - Incorrectly Equipped 00945 - Crash Sensor (G190) 29-00 - Short to Ground 00914 - Window Regulator Switch; Rear Left; Driver (E53) 27-10 - Implausible Signal - Intermittent 00915 - Window Regulator Switch; Rear Right; Driver (E55) 27-10 - Implausible Signal - Intermittent End --------------------------------------------------------------------------------------------------
 

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Discussion Starter #5
Let the car warm up then I turned it off...My dash stayed lit this time but took 4 turns on the key before the engine reacted. Relay or ignition switch? ALso looking at the volt meter if i rev the engine on decel the battery drops to 9-10.5v
 

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I would have your 12V battery load-tested and/or just replace it. Any idea how old it is? Are the terminal contacts clean and tight?
 

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Discussion Starter #7
I would have your 12V battery load-tested and/or just replace it. Any idea how old it is? Are the terminal contacts clean and tight?
Everything is clean but its a DieHard battery, does sears even still exist? Assuming its older and swinging to batteries plus to get tested today. It dropped from the 70s to the 30s last night so i feel like the battery took a gut punch on that.
 

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4 turns for the engine to crank? It may be a dead cell in the battery and lost communication with the instrument cluster caused the immo to activate. I just got back yesterday from the weekend dog sitting for my son in Austin. Headwinds of 30mph in the Tiguan killed the mpg. I think we dropped to 22 this am.
 

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Battery was at 11.65? That is too low. I am surprised it even started the car. How did they test the battery?
 

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Discussion Starter #11
Battery was at 11.65? That is too low. I am surprised it even started the car. How did they test the battery?
The battery was at 11.65 in the morning most likely because I had tried starting the car so many times the night before unsuccessfully. Took it into batteries plus and they hooked it up to their machine. Said the CCA was showing at above what's printed on the battery and I had a full charge. Take it to autozone for another test?
 

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I would also check the positive leads, if you are lucky, it's just a bad connection due to looseness or corrosion. I was thinking ABS due to the display issue, but the scan says it's good.
 

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Discussion Starter #14
So everything has been fine for the last 2 weeks... Last night the ol lady dragged me to pick up a Christmas tree at 8:45pm and I left the car running while I tied it up. When I got back in the car the lights on the dash were off and the windows wouldn't work again. Heard a humming coming from the dash area and when I shined a light on it all the needles were stuck, and the lcds were going bonkers. Did the same thing as last time when I tried to restart it, just got killed by antitheft. Undoing the battery resets everything and the car started back up but had the airbag error again on first start. I'm assuming my dash is just going out? Can I just pull one and get vw to flash it? Is there just a bad connection I need to resolder? Anyone know roughly what vw charges to pair one?

Video of dash acting up below:

Also, HAPPY THANKSGIVING, especially our European friends on the board too! 😂
 

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In post #5, you mention the voltage going to 9-10.5 volts. Not sure where you measured that, but a healthy battery with good connections would never let that happen.

Measure the voltage, e.g. at the lighter plug, next time the instrument cluster goes bonkers. It really behaves like the voltage is too low. I'll bet you've either got a battery on its way out or maybe a loose ground connection. Batteries usually have a label of some sort that indicates when they were installed; 5 years is a good life.
 

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Discussion Starter #16
In post #5, you mention the voltage going to 9-10.5 volts. Not sure where you measured that, but a healthy battery with good connections would never let that happen.

Measure the voltage, e.g. at the lighter plug, next time the instrument cluster goes bonkers. It really behaves like the voltage is too low. I'll bet you've either got a battery on its way out or maybe a loose ground connection. Batteries usually have a label of some sort that indicates when they were installed; 5 years is a good life.
I had the volt meter direct on the battery when I was seeing those readings. I took the battery to get tested and they said it was fine, chances they can be dying but still test correct? Odd that you mention the cigarette lighter.. It's never worked well, if I plug in a charger I have to wiggle and spin it for a bit before it makes a connection.
 

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My son's battery tested fine initially and then a week later it tested bad. It did cause the oil pressure light to come on whenever he was at low rpm. New battery and no more oil light issues.
 

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Discussion Starter #18
My son's battery tested fine initially and then a week later it tested bad. It did cause the oil pressure light to come on whenever he was at low rpm. New battery and no more oil light issues.
They had batteries 20% off so I picked one up for ~$100...Cleared all the codes and seeing what happens...Maybe its placebo or maybe it actually helped but I feel like my fob is more responsive from further away now too.
 
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