Golf L4-1781cc 1.8L SOHC (RV) (1990)
Coolant Temperature Sensor/Switch (For Computer): 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.