Transmission Control Systems

1. MEASURE SIGNAL VOLTAGE OUTPUT EMITTED FROM TCU.
a. Warm up the engine and transmission.
b. Ignition switch ON (Engine OFF).
c. Move selector lever to "N".
d. While opening and closing throttle valve, measure voltage between TCU connector and body.


Connector & Terminal/Specified value
(B33) No. 8 - No. 10
1.5 - 3.0 V (Throttle is fully closed.)
0.5 V, max. (Throttle is fully open.)

(B33) No. 7 - No. 10
5 - 14 V (Throttle is fully closed.)
0.5 V, max.(Throttle is fully open.)





2. CHECK HARNESSES BETWEEN TCU AND DUTY SOLENOID A AND BETWEEN TCU AND RESISTOR.
a. Disconnect connector from TCU.
b. Disconnect connector from transmission.
c. Disconnect connector from resistor.
d. Measure resistance between TCU connector and transmission and between TCU connector and body.


Connector & Terminal/Specified value
(B33) No. 8 - (B16) No. 7/0 ohms
(B33) No. 8 - Body/1 Mohm min.

e. Measure resistance between TCU connector and resistor connector and between TCU connector and body.


Connector & Terminal/Specified value
(B33) No. 7 - (B2) No. 1/0 ohms
(B33) No. 7 - Body/1 Mohm min.



3. CHECK DUTY SOLENOID A's GROUND LINE.
a. Disconnect connector from transmission.
b. Measure resistance between transmission connector receptacle (on transmission) and transmission case.


Connector & Terminal/Specified value
(E19) No. 4 - Transmission/1 ohm max.



4. CHECK RESISTOR.
a. Disconnect connector from resistor.
b. Measure resistance between resistor terminals.

Specified resistance:
9 - 15 ohms



5. CHECK DUTY SOLENOID A
a. Disconnect connector from transmission.
b. Measure resistance between transmission connector receptacle (on transmission) terminals.


Connector & Terminal/Specified value
(E19) No. 7 - No. 4 /1.5 - 4.5 ohms