Diagnostic Aids
Scan tester displays transmission fluid temperature in degrees Centigrade. After transmission is running, displayed temperature should rise steadily to about 212°F (100°C) then stabilize. A faulty connection or an open in ground circuit or signal circuit will result in a Code 59. Test transmission sensor at various temperature levels to determine if sensor is out of calibration. See TEMPERATURE-TO-RESISTANCE VALUES. An out-of-calibration sensor could result in firm shifts or TCC enabled complaint.
TEMPERATURE-TO-RESISTANCE VALUES
| °F (°C) |
Ohms |
| 210 (100) |
177 |
| 160 (70) |
450 |
| 100 (38) |
1800 |
| 70 (20) |
3400 |
| 40 (4) |
7500 |
| 20 (-7) |
13,500 |
| 0 (-18) |
25,000 |
| -40 (-40) |
100,700 |