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 ATF temperature sensor.
PREPARATION:

Disconnect the transmission wire connector.

CHECK:

Measure resistance between terminals 1 and 7 of transmission wire connector.

OK:

79 Ω - 156 kΩ

CHECK:

Measure resistance between terminals 1 and 7 of the transmission wire connector and body ground.

OK:

Resistance: 1 MΩ or higher

Fig 1: Disconnecting Transmission Wire Connector
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1. NG : Replace the ATF temperature sensor (transmission wire) (See ATF TEMPERATURE SENSOR ).
2. OK : Go to next step.
Check harness and connector between ATF temperature sensor and ECM (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).
1. NG : Repair or replace the harness or connector.
2. OK : Check and replace the ECM (See HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE ).