If not as specified, replace the front axle hub.
Rear Speed Sensor
A340E and R154
[ kg cm jft lb, N mjJ : Specified torque
INSPECTION OF REAR SPEED SENSOR
1. INSPECT SPEED SENSOR
(a) Disconnect the speed sensor connector.
(b) Check that there is no continuity between oach terminal and sensor body.
If there is continuity, replace the speed sensor.
(c> Remove the speed sensor from the transmission.
(d) Remove the terminals from the connector.
(e) Using a resistor (2 — 10 kfl), complete the circuit as shown in the illustration.
HINT: Do not short any terminal.
(f> Check that the voltmeter alternately indicates 12 V and 2 V or less as the screwdriver is repeatedly brought towards the sensor and then withdrawn.
If indications are not as specified, replace the speed sensor.
HINT: Cover the screwdriver tip with a cloth before use to prevent scratching the tip of the speed sensor.
Example of voltage changes for malfunctions
(Changes but stays above 2 V)
(g) Install the terminals to the connector. NOTICE: Do not misinstall the terminals.
(h) Install the speed sensor properly with a bolt, and tighten the bolt.
A340E, R154 160 kg-cm (12 ft-lb, 16 N-m) W58 290 kg-cm (21 ft-lb, 28 N-m)
On-Vehicle Inspection (Reference)
(a) Remove the glove box and pull out the A.B.S. computer with connector connected.
(b) From back side of the connector, connect the oscilloscope to the terminal RR + (input) and RR — (ground).
(c) Run the vehicle at 20 km/h (12.4 mph)f check that the speed sensor output wave matches the wave pattern shown in the illustration.
(d) Disconnect the oscilloscope and install the computer in place.
(e) Install the glove box.
2. INSPECT SENSOR ROTOR SERRATIONS
(a) Drain the transmission fluid.
(b) Remove the propeller shaft. (See page PR-3)
(c) Remove the extension housing.
Inspect the sensor rotor serration for scratches, cracks, missing teeth or abnormal play.
Inspect the reverse gear serration for scratches, cracks, missing teeth or abnormal play.
(f) Install the extension housing.
(g) Install the propeller shaft. (See page PR-9)
(h) Fill the transmission fluid and check fluid level.
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