1995 VW Jetta

Tiny
BRIANTUSKO
  • MEMBER
  • 1995 VOLKSWAGEN JETTA
  • 5 CYL
  • 2WD
  • MANUAL
  • 200,000 MILES
My car is a VW Jetta 1995. When I driving, my check engine light comes on sometimes, not always. When it does come on, the car eimmediately loses speed and slows down. I turn off engine, then restart it and light goes away and it runs fine. Periodically, it will come back on again. Is their a way I can retrieve codes w/out having to use a OBD1 reader. Or, do you have any idea what is causing this.
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Thursday, December 30th, 2010 AT 11:01 PM

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Tiny
MERLIN2021
  • EXPERT
Engine choices for Jetta 1.8, 1.9, 2.0, 2.8 4 or 6 cylinders.
PROCEDURES FOR READING 1994-95 VW TROUBLE CODES
On 1994-95 VWs, the diagnostic connector appears to be a standard OBD II connector -- but it is not. The engine
management system has its own codes and diagnostic procedures.

The codes can be read manually using the following procedure:

1. Start the engine and allow it to idle. If engine will not start, disable the ignition by disconnecting the coil wire from the
distributor cap and grounding it. Crank the engine for at least 30 seconds before attempting to read codes.

2. Use a jumper wire to connect pin #4 to pin #15 on the diagnostic connector for about 5 seconds. The MIL lamp should
come on for about 2.5 seconds, then go out, then start to flash out codes.

Codes are displayed as a series of four digits. The number of each digit is represented by a series of short flashes. One
short flash would be a 1, two short flashes would be a 2, three short flashes would be a 3, and four short flashes would be a
4. The code is displayed only once.

Example: Two short flashes, followed by two short flashes, followed by three short flashes, followed by four short flashes
would be a code 2234.

Write the code number down, then repeat step 2 to retrieve the next code (if there is more than one code in memory).
Repeat until you see four LONG flashes (indicating there are no more codes).

If the first code you see is 4444 (four short flashes that repeat four times), there are NO trouble codes stored in memory.

Codes can be cleared by momentarily disconnecting the battery cable, or the ECU power fuse.
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Saturday, March 12th, 2011 AT 7:24 PM

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