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VW MKIII-A3/B4 TDIs This is a discussion about MKIII-A3/MkIII Jetta/Golf (<99.5) and B4 Passats (96,97) TDI's. Non TDI related postings will be moved or removed.

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Old March 5th, 2018, 10:36   #1
Join Date: Mar 2018
Location: Big lake, MN
TDI(s): 1999 Jetta
Default 1999 IP problem or ECM?

LONG BACKSTORY, skip to bottom for current problems...

Having some problems with my jetta recently, started to act up this summer while running to work, cruising along in the rain and lost everything. cruise kicked off, no throttle, etc. get to side of road and shut off car and try to restart, no start. car gets towed, and later check wiring from injection pump under battery box, found multiple corroded wires, repaired.
Ran fine for 2-3 months, and then suddenly died again on way to work, left car for a while, came back and started right up, drove to work and bought VCDS. checked codes, read up on forum and ended up resetting injection pump value to stock (was WAY off) and hammer mod to get injection quantity to 5 if I remember correctly.
NOW for the interesting part, its winter now... started car while clearing driveway, while backing up car through a snow pile I kill it/ it dies (its a manual) and will not restart. Pull codes via VCDS, get Bentley manual and troubleshoot, OHM out sensors and wiring, and ended up with probable dead ECM.
ANY help appreciated. sorry for the long backstory...

VCDS -- Windows Based VAG/VAS Emulator Running on Windows 8.1 x64
VCDS Version: (x64) HEX-V2 CB: 0.4411.4
Data version: 20180212 DS287.0


Chassis Type: 9M - VW Jetta IV (1998 > 2014)
Scan: 01 02 03 08 09 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57
75 76

Mileage: 567800km-352814miles
Address 01: Engine Labels: 038-906-018-AGR.lbl
Part No: 038 906 018 EB
Component: 1,9l R4 EDC G700SG 2143
Coding: 00002
Shop #: WSC 00066
VCID: 5AEE9A36D504DD275CC-4B3C
6 Faults Found:
16764 - Glow Plug/Heater (Q6) Circuit
P0380 - 35-10 - Malfunction - Intermittent
17664 - Engine Coolant Temp Sensor (G62)
P1256 - 35-10 - Open or Short to Plus - Intermittent
17970 - Quantity Adjuster (N146)
P1562 - 35-10 - Upper Limit Reached - Intermittent
17971 - Quantity Adjuster (N146)
P1563 - 35-10 - Lower Limit Reached - Intermittent
17762 - Modulating Piston Movement Sensor (G149)
P1354 - 35-10 - Electrical Malfunction - Intermittent
17656 - Start of Injection Timing Regulation
P1248 - 35-10 - Control Deviation - Intermittent
Readiness: 1 6 0 0 0
Crazykrueger is offline   Reply With Quote
Old March 5th, 2018, 11:52   #2
Veteran Member
Join Date: Aug 2009
Location: Lompoc, CA

Lotsa backround info is good. More than one paragraph with spaces between them is great.

Based on the intermittent nature of your problems I'd say you probably still have wiring issues.
Saying no to gas for 25 years:

Current: 02 Jetta, Auto; 98 Jetta, 5 Spd; 98 Dodge, 5 Spd, SB, 4x4; 84 Grand Wagoneer with Nissan SD33T, NV4500, Dana 300, Reverse Cut Dana 44, Dana 60

The Black Sheep (Only gasser): 85 CJ, 4.2 w/4.0 Head and Mopar FI.

Past: 85 Mitsubishi PU, 4D55T; 81 Rabbit, 1.6; 80 Dasher, 1.5; 79 Rabbit, 1.5
KLXD is offline   Reply With Quote
Old March 5th, 2018, 13:24   #3
Join Date: Mar 2018
Location: Big lake, MN
TDI(s): 1999 Jetta

Will remember, thanks KLXD.

Wiring ohms out good from ECM to inj. pump. Followed Bentley’s diagnostic procedure also. Cranks over fine also. Probably going to buy a ECM and tear into the harness then.
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