90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
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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 OFF
Pin 18 to G1 ......................................................................................................................................................................................................... 0.0V
Pin 35 to G1 ......................................................................................................................................................................................................... 0.0V
Pin 34 to G1 ......................................................................................................................................................................................................... 0.0V
Pin 34 is a ground for M/T only.
KEY ON
Pin 18 to G1 ................................................................................................................................................................................................. 0.0 - 0.5V
Pin 35 to G1 ................................................................................................................................................................................................. 0.0 - 0.5V
Pin 34 to G1 ................................................................................................................................................................................................. 0.0 - 0.5V
Pin 34 is a ground for M/T only.
BATTERY SUPPLY
Pin 19 to 35
KEY OFF ....................................................................................................................................................................................................... 11 - 13V
KEY ON ........................................................................................................................................................................................................ 11 - 13V
MAIN RELAY SUPPLY
Pin 14 to 35
Key OFF ............................................................................................................................................................................................................... 0.0V
Key ON .......................................................................................................................................................................................................... 11 - 13V
REFERENCE SUPPLY
Pin 26 to 35
Key ON ........................................................................................................................................................................................................ 4.5 - 5.5V
COOLANT TEMPERATURE SENSOR
Pin 3 to 15
68°F ............................................................................................................................................................................................................. 1.6 - 1.8V
176°F - 194°F .............................................................................................................................................................................................. 0.3 - 0.4V
ALTITUDE SENSOR
Pin 26 to 35 ........................................................................................................................................................................................................ 4.5 - 5.5V
Pin 25 to 35 (Under 6500') ................................................................................................................................................................................. 1.5 - 4.0V
- Not installed on 80 model 2.0L 1989-90.
- As altitude increases voltage decreases.
AIR CONDITIONER CONTROL
Engine Idling
Pin 33 to 35 (A/C on) ..................................................................................................................................................................................... 11 - 13V
IDLE SWITCH
Pin 28 to 35
Closed .......................................................................................................................................................................................................... 0.0 - 0.5V
Opened ............................................................................................................................................................................................................. 8 - 12V
FUEL ENRICHMENT SWITCH
