Diagnostic Procedure
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sequoia, 2002 Toyota 4Runner, and 2001 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
- Raise and support vehicle. Disconnect ATF temperature sensor connector. Remove sensor. Connect ohmmeter leads between sensor terminals. See WIRING DIAGRAMS .
- Submerge sensor in water. Heat water while measuring sensor resistance. See ATF TEMPERATURE SENSOR RESISTANCE table. If resistance is not as specified, replace sensor. If resistance is as specified, inspect and repair wiring harness circuits between sensor and ECM. If circuits are okay, replace ECM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE.
ATF TEMPERATURE SENSOR RESISTANCE
| Application & Temperature - °F (°C) | Ohms | |
|---|---|---|
| Sequoia, Tacoma & Tundra | ||
| 68 (20) | 12,100 | |
| 230 (110) | 790 | |
| 4Runner | ||
| 68 (20) | 4290 | |
| 230 (110) | 690 | |