Test TC: Step 32
32) Checking Resistance Of TOT Sensor Ensure transmission temperature is 50° F (10°C), if transmission has cooled down, repeat test drive. Turn key off and wait 10 seconds. Ensure breakout box is installed and ECA is disconnected. Ensure bulkhead connector is connected at transmission. Set DVOM on 200-k/ohm scale. With KOEO, ensure transmission oil pan is "warm to touch" on side away from exhaust manifold. Measure resistance between test pin No. 42 (test pin No. 7 on 7.3L diesel) and test pin No. 46 at the breakout box. If resistance is within specification, go to next step. See TOT RESISTANCE CHART. If resistance is not as specified, repair or replace TOT sensor.
TRANSMISSION OIL TEMPERATURE (TOT) SENSOR RESISTANCE
| Temperature °F (°C) | Resistance (ohms) Should Be Between: |
|---|---|
| 32-58 (0-20) | 37K-100K |
| 59-104 (21-40) | 16K-37K |
| 105-158 (41-70) | 5K-16K |
| 159-194 (71-90) | 2.7K-5K |
| 195-230 (91-110) | 1.5K-2.7K |
| 231-266 (111-130) | .8K-1.5K |