Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

Check O/D direct clutch speed sensor.
PREPARATION:

Remove the O/D direct clutch speed sensor from the transmission.

CHECK:
1. Measure resistance between terminals 1 and 2 of O/D direct clutch speed sensor.
2. Check voltage between terminals 1 and 2 of the speed sensor when a magnet is put close to the front end of the speed sensor then kept away quickly.
OK:

(a): Voltage is generated intermittently

(b): Resistance: 560 - 680 Ω at 20 °C (68 °F)

HINT:

The generated voltage is extremely low.

Fig 1: Measuring Resistance Between Terminals 1 And 2 Of O/D Direct Clutch Speed Sensor
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1. NG : Replace the O/D direct clutch speed sensor (See O/D DIRECT CLUTCH SPEED SENSOR ).
2. OK : Go to next step.
Check harness and connector between ECM and O/D direct clutch speed sensor (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace harness and connector.
2. OK : Check and replace the ECM (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).