Transmission Control Systems

1. MEASURE SIGNAL VOLTAGE INPUT OF TCU.
a. Turn ignition switch ON (with engine OFF) and measure signal voltage input of TCU.
b. Start and warm up the engine. Measure signal voltage input of TCU.

Connector & Terminal/Specified value
(B44) No. 10 - (B46) No. 20/
1.4 - 1.7 V [ATF temperature: 20° C (6° F)]
0.3 - 0.6 V [ATF temperature: 80° C (176° F)]


2. CHECK HARNESS BETWEEN TCU AND ATF TEMPERATURE SENSOR.
a. Disconnect connector from TCU.
b. Disconnect connector from transmission.
c. Measure resistance between TCU connector and transmission connector, and between TCU connector and body.

Connector & Terminal/Specified value
(B44) No. 10 - (B16) No. 5/0 ohms
(B44) No. 10 - Body/1 Mohm min.
(B46) No. 20 - (B16) No. 12/0 ohms


3. CHECK ATF TEMPERATURE SENSOR.
a. Disconnect connector from transmission.
b. Measure resistance between transmission connector receptacle's terminals.


Connector & Terminal/Specified value
(E19) No. 5 - No. 12/2.3 - 2.7 K Ohms [ATF temperature: 20°C (68°F)

c. Connect connector to transmission, and warm up the engine to increase ATF temperature.
d. Stop the engine and disconnect connector from transmission.
e. Measure resistance between transmission connector receptacle's terminals.

Connector & Terminal/Specified value
(E19) No. 5 - No. 12/280 - 360 ohms [ATF temperature: 80°C (176°F)i