Rear Speed Sensor

1. Disconnect speed sensor connector removing necessary brake assemblies as required.
2. Measure resistance between terminals. On 1989 Celica, Supra and Camry models, resistance should be 800-1300 ohms. On 1991-92 Celica 4WD models, resistance should be 800-1500 ohms. On 1990 Celica, 1991-92 Previa and 1990-92 Camry models, resistance should be 1050-1450 ohms. On Cressida models, resistance should be 1200-1600 ohms. On 1991-92 Celica 2WD models, resistance should be 1100-1700 ohms. On MR2 models, resistance should be 900-1500 ohms. On Pickup and 4Runner models, resistance should be 580-700 ohms. If resistance is not as specified, replace sensor.
3. On Supra and Cressida models, disconnect speed sensor connector, then ensure there is no continuity between each terminal and sensor body.
4. On all models, remove speed sensor from transmission, then the terminals from connector.

Fig. 67 Rear Speed Sensor Circuit Test:

5. Using a resistor, 2000-10,000 ohms, complete circuit as shown in Fig. 67. Ensure voltmeter shows 2 volts or less as a cloth covered screwdriver is brought near sensor.
6. Inspect sensor rotor serrations visually as follows:
a. Drain transmission fluid, then remove propeller shaft and extension housing.
b. On A340, R154 transmission models, inspect sensor rotor serration, mounted on main shaft. On W58 models, inspect reverse gear serrations.
c. On all models, install extension housing, propeller shaft, then fill transmission with proper fluid, then check level.