Coolant Temperature Sensor
- Unplug coolant temperature sensor. On Amigo, Pickup and Rodeo (2.6L), sensor is located on right side of engine, below intake manifold. Sensor connector contains Black and Green/Yellow wires.
- On Trooper, sensor is located on rear of engine, in coolant transfer tube. SOHC is located in driver side of tube and DOHC is located in passenger side of tube. Sensor connector contains Black and Black/Gray wires.
- On all models, check resistance between sensor terminals at specified temperature. See COOLANT TEMPERATURE SENSOR RESISTANCE SPECIFICATIONS table. Replace sensor if not within specification.
NOTE:
Coolant temperature sensor malfunctions may also set Codes 14 and 15. For additional testing information, see appropriate TESTS W/CODES
article in the ENGINE PERFORMANCE Section.
COOLANT TEMPERATURE SENSOR RESISTANCE SPECIFICATIONS
| Temperature °F (°C) | Ohms | |
|---|---|---|
| Amigo, Pickup & Rodeo 2.6L | ||
| 14 (-10) | 7000-12,000 | |
| 50 (10) | 3000-5000 | |
| 68 (20) | 2000-3000 | |
| 122 (50) | 700-1000 | |
| 176 (80) | 200-400 | |
| Trooper | ||
| -40 (-40) | 100,700 | |
| 0 (-18) | 25,000 | |
| 20 (-7) | 13,500 | |
| 40 (4) | 7500 | |
| 70 (21) | 3400 | |
| 100 (38) | 1800 | |
| 160 (71) | 450 | |
| 210 (99) | 185 | |
| Pickup & Rodeo 3.1L | ||
| -40 (-40) | 100,700 | |
| -22 (-30) | 52,700 | |
| -4 (-20) | 28,680 | |
| 5 (-15) | 21,450 | |
| 14 (-10) | 16,180 | |
| 23 (-5) | 12,300 | |
| 32 (0) | 9420 | |
| 41 (5) | 7280 | |
| 50 (10) | 5670 | |
| 59 (15) | 4450 | |
| 68 (20) | 3520 | |
| 77 (25) | 2796 | |
| 86 (30) | 2238 | |
| 95 (35) | 1802 | |
| 104 (40) | 1459 | |
| 113 (45) | 1188 | |
| 122 (50) | 973 | |
| 140 (60) | 667 | |
| 158 (70) | 467 | |
| 176 (80) | 332 | |
| 194 (90) | 241 | |
| 212 (100) | 177 | |