LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 1989 >> Fox Base >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests >> Engine Sensors & Switches >> Coolant Temperature Sensor (Fox)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Coolant Temperature Sensor (Fox)

The Coolant Temperature Sensor is mounted on bottom of coolant outlet on cylinder head. Resistance measured across sensor terminals should match values represented in COOLANT TEMPERATURE SENSOR RESISTANCE table. If necessary, test circuit using charts in the J - PIN VOLTAGE CHARTS article. If resistance measured across sensor terminals does not match values COOLANT TEMPERATURE SENSOR RESISTANCE table, sensor is faulty and should be replaced. Always use new sealing washer. Replacing sensor will require draining and replacing some of engine coolant.

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C) Ohms
68 (20) 3000-2000
86 (30) 2000-1500
104 (40) 1500-1000
122 (50) 1000-800
140 (60) 700-500
158 (70) 500-375
176 (80) 375-275
194 (90) 275-225