5000S Quattro Sedan L5-2309cc 2.3L SOHC (NF) (1988)
Engine Control Module: Pinout Values and Diagnostic Parameters
Voltage Measurements
35 Position ECU Plug
For Terminal ID please refer to "Powertrain Management : Computers and Control Systems : Engine Control Module : Connector Views". See:
Diagrams/Connector Views
GROUNDS
KEY ON
Pin 8 to G1 ................................................................................................................................................................................................... 0.0 - 0.5V
Pin 18 to G1 ................................................................................................................................................................................................. 0.0 - 0.2V
Pin 34 to G1 (M/T only) .............................................................................................................................................................................. 0.0 - 0.2V
Pin 35 to G1 ................................................................................................................................................................................................. 0.0 - 0.2V
MAIN RELAY SUPPLY
Pin 14 to 18
Key OFF ............................................................................................................................................................................................................... 0.0V
Key ON .......................................................................................................................................................................................................... 11 - 13V
REFERENCE SUPPLY
Pin 24 to 26
Key OFF ............................................................................................................................................................................................................... 0.0V
Key ON ........................................................................................................................................................................................................ 4.5 - 5.5V
COOLANT TEMPERATURE SENSOR
Pin 3 to 18
68°F ............................................................................................................................................................................................................. 1.5 - 2.5V
176°F - 194°F .............................................................................................................................................................................................. 0.3 - 0.9V
ALTITUDE SENSOR
Pin 24 to 26 ........................................................................................................................................................................................................ 4.5 - 5.5V
Pin 24 to 25 (Under 6500') ................................................................................................................................................................................. 1.5 - 4.0V
- Above 6500' voltage will be less than 1.5V.
- As altitude increases voltage decreases.
AIR CONDITIONER CONTROL
Engine Idling
Pin 18 to 33 (A/C on) ..................................................................................................................................................................................... 11 - 13V
TRANSMISSION SWITCH
Engine idling
Pin 18 to 34 (A/T only in P/N) .............................................................................................................................................................................. <1V
IDLE SWITCH
Pin 18 to 28
Closed ............................................................................................................................................................................................................ 11 - 13V
Opened ......................................................................................................................................................................................................... 0.0 - 1.0V
FUEL ENRICHMENT SWITCH
Pin 18 to 31
Closed ............................................................................................................................................................................................................ 11 - 13V
Open ............................................................................................................................................................................................................. 0.0 - 1.0V
AIR FLOW POTENTIOMETER