Jerry Stringer
Veteran Member
2003 VW Jetta TDI
I replaced the two top-most seals on the fuel injection pump. A couple of days later the temperature dropped more than 25 degrees overnight and the car wouldn't start the next morning. This had been happening more often due to the seals needing replacing, but it wouldn't keep running after repeated attempts. I replaced the pump head seal and the car still wouldn't crank. It was only then that I looked at the dash and saw the Immobilizer light was on. It is still on and I have tried all the "tricks" to reset the Immobilizer to no effect. The error code is 17978 (Engine Start Blocked by Immobilizer). Using the instructions from the Ross-Tech site (http://www.ross-tech.com/vag-com/cars/Immo3-measuring-blocks.html) after accessing 17-Instruments I get the following codes:
022 0,1,0,2
023 0,0,0,6
024 0.0,0.0,0.0,0.0
The morning it wouldn't stay running (I now know) was because of the Immobilizer and not the pump head seal. My car is cranked many times per day so I have an on-board battery charger. It was hooked up the night before this happened. Since this has happened I noticed the voltage (monitoring voltage with device plugged into cigarette lighter) being 15.5 volts. I have monitored the battery charger since then and it only goes to 14.6 and then drops to float. I have checked and all fuses are good. In using instructions from the Ross-Tech site I did have a fault code of 01176 -Key (07-00 Signal too low). I have been using the keys I have always used with the car, one of which is the valet key which, as far as I know, was original to the car.
The higher-than-normal voltage has to have caused the original problem. I need help.
Jerry
I replaced the two top-most seals on the fuel injection pump. A couple of days later the temperature dropped more than 25 degrees overnight and the car wouldn't start the next morning. This had been happening more often due to the seals needing replacing, but it wouldn't keep running after repeated attempts. I replaced the pump head seal and the car still wouldn't crank. It was only then that I looked at the dash and saw the Immobilizer light was on. It is still on and I have tried all the "tricks" to reset the Immobilizer to no effect. The error code is 17978 (Engine Start Blocked by Immobilizer). Using the instructions from the Ross-Tech site (http://www.ross-tech.com/vag-com/cars/Immo3-measuring-blocks.html) after accessing 17-Instruments I get the following codes:
022 0,1,0,2
023 0,0,0,6
024 0.0,0.0,0.0,0.0
The morning it wouldn't stay running (I now know) was because of the Immobilizer and not the pump head seal. My car is cranked many times per day so I have an on-board battery charger. It was hooked up the night before this happened. Since this has happened I noticed the voltage (monitoring voltage with device plugged into cigarette lighter) being 15.5 volts. I have monitored the battery charger since then and it only goes to 14.6 and then drops to float. I have checked and all fuses are good. In using instructions from the Ross-Tech site I did have a fault code of 01176 -Key (07-00 Signal too low). I have been using the keys I have always used with the car, one of which is the valet key which, as far as I know, was original to the car.
The higher-than-normal voltage has to have caused the original problem. I need help.
Jerry