Volkswagen Workshop Service and Repair Manuals

Knock Sensor: Electrical Specifications

TEMPERATURE CHART

Air Flow Sensor

Between terminals 6 and 7 .....................................................................................................................................................................  500 - 1000 ohms
Between terminals 17 and 21 (flap moved) .........................................................................................................................................  Resistance change

Coolant Temperature Sensor

Between sensor terminals .....................................................................................................................................  Refer to TEMPERATURE CHART

Digifant II Control Unit

Power supply to terminal 14 ...................................................................................................................................................................  Battery Voltage
Engine speed limit ................................................................................................................................................................................  6500 +/- 50 RPM

Fuel Injector

All injectors at the fuel rail plug connector ...............................................................................................................................................  3.7 - 5.0 ohms
Each injector disconnected ..........................................................................................................................................................................  14 - 18 ohms

Intake Air Temperature Sensor

Between terminals 6 and 9 of air flow sensor ........................................................................................................ Refer to TEMPERATURE CHART

Idle Stabilizer Valve

Between terminals on valve ...........................................................................................................................................................................  2 - 10 ohms

Knock Sensor

Between terminals 1 and 2 ..........................................................................................................................................................................  infinite ohms

Oxygen Sensor

Preheat Resistor Cold (less than 68 deg. F./20 deg. C.) ........................................................................................................................................  3 ohms
Preheat Resistor Hot (greater than 662 deg. F./350 deg. C.) ..............................................................................................................................  13 ohms
Output Voltage (with CO adjustment within specs) ...................................................................................................................................  0.3 - 0.7 volts

Tune-up Specifications

Air/Fuel Ratio ..........................................................................................................................................................................................................  0.7%
Air/Fuel Ratio-Limits [1]..................................................................................................................................................................................  0.3 - 1.1%
Timing [2] ...............................................................................................................................................................................................  6° +/- 1° BTDC
Timing Advance [3] ..............................................................................................................................................................................  30° +/- 3° BTDC
Idle RPM [4] ....................................................................................................................................................................................................  800 +/- 50

[1] Check CO with the oxygen sensor connected.
[2] AT 2300 RPM, and coolant temperature sensor disconnected.
[3] Normal operating temperature, with coolant temp. sensor connected, at 2300 RPM. Add initial timing.
[4] A/C off.