1975-79 Models (All)

Disconnect plug and connect an ohmmeter between engine coolant sensor and ground. As sensor temperature increases, resistance will decrease. See ENGINE COOLANT SENSOR SPECIFICATIONS table .

Fig 1: Intake Air Sensor & Potentiometer

Courtesy of NOT AVAILABLE

1976-79 ENGINE COOLANT SENSOR SPECIFICATIONS

Coolant Temperature °F (°C)

Resistance (Ohms)

-22 (-30)

20, 300-33, 000

14 (-10)

⁽¹⁾ 7600-10, 800

50(10)

3250-4150

68 (20)

⁽²⁾2250-2750

122(50)

740-940

176 (80)

⁽³⁾ 290-360

⁽¹⁾	On BMW 733i, reading should be 7000-11, 600 ohms.

⁽²⁾	On BMW 733i, reading should be 2100-2900 ohms

⁽³⁾	On BMW 733i, reading should be 270-390 ohms.