|
1.
| caution |
Be careful not to damage a
connector terminal.
|
Disconnect the A/T control solenoid valve
assembly connector.
2.Use the special tool
(MB991709) to check the continuity between the terminals
according to the table below.
Measurement terminal
No.
|
Continuity
|
23
- body earth
|
No
|
24
- body earth
|
23
- 24
|
Yes
|
|
|
3.If the measurements do not
satisfy the table, check the internal parts in the
transmission according to the procedure below:
(1)
Remove the drain plug (overflow plug) and overflow tube and
then drain fluid (refer to  ).
(2)
Remove the transmission oil pan and the valve body to remove
the output shaft speed sensor (refer to GROUP 23B -
Oil Pan and Valve Body Assembly Removal and Installation ).
(3)
Check the wiring harness between the output shaft speed
sensor connector and the A/T control solenoid valve
assembly connector for open or short circuit, or other
faults.
(4)
|
|
| caution |
A 100-Ω
resistor, which has a rated output
of 2 W, should be used. Otherwise, a
scalding or a fire may be
caused.
|
|
Connect the output shaft speed sensor connector
terminal No. 2 to the positive battery terminal. Connect a
100-Ω resistor and an ammeter between the terminal
No.1 and the negative battery terminal.
(5)
When a piece of non-magnetised metal is shaken
right-and-left within 5 mm away from the tip of the output
shaft speed sensor, the electric current should satisfy the
table below:
Standard
value:
Signal
|
Current (mA)
|
High
|
12.0 - 16.0
|
Low
|
4.0
- 8.0
|
4.If the wiring harness is faulty,
replace the transmission wiring harness as an
assembly.
5.If the table is not satisfied, replace
the output shaft speed sensor.
|