Ohms Values

35 Position ECU Plug:

CAUTION: When measuring Ohms disconnect the ECU from the harness plug and never turn the ignition key on. It is possible that failure to follow these steps will result in damage to the ECU.

GROUNDS
KEY OFF
Pin 5 to G1 CONTINUITY
Pin 5 to 16 CONTINUITY
Pin 5 to 17 CONTINUITY
Pin 5 to 19 CONTINUITY
Pin 5 to 28 CONTINUITY
This terminal is a ground on 325e, 528e, and 533i A/T only. Altitude switch on 528e, 533i, 535i 1984 only.

MAGNETIC COIL SENSORS
Sensor type
Pin 25 to 26 (speed/Mark) 800 - 1200 Ohms
Pin 8 to 27 (Cyl ID) 800 - 1200 Ohms

COOLANT TEMPERATURE SENSOR
Pin 5 to 13
68°F 2200 - 2700 Ohms
176-194°F 250 - 350 Ohms

AIR TEMPERATURE SENSOR
Pin 6 to 22
68°F 2200 - 2700 Ohms
104° - 122°F 700 - 1000 Ohms

THROTTLE SWITCH
Pin 5 to 2 (Closed) CONTINUITY
Pin 5 to 3 (Full load) CONTINUITY

ISC VALVE
Winding(s)
Pin 33 to 34 35 - 45 Ohms

AIR FLOW SENSOR
At rest
Pin 6 to 9 (supply) 450 - 1000 Ohms
Pin 6 to 7 (load) 50 - 125 Ohms
Flap on air flow sensor closed or air flow sensor plate at rest position. Resistance increases as flap or plate opens.
Pin 6 to 7 (load) 300 - 800 Ohms
Flap on air flow sensor opened to maximum or air flow plate deflected to maximum.

SINGLE INJECTOR
Winding
Across injector contacts 3.3 - 3.7 Ohms

INJECTOR GROUP(S)
Winding
Pin 14 to 35 1.1 - 1.3 Ohms
Pin 15 to 35 1.1 - 1.3 Ohms