AUTOMATIC TRANSMISSION ± Troubleshooting <A/T>
23-16
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with the MUT-II is not possible
Probable cause
If communication with the MUT-II is not possible, the cause is probably a malfunction
in the self-diagnosis system or the A/T-ECU is not functioning.
D Malfunction of self-diagnosis system
D Malfunction of A/T-ECU power circuit
D Malfunction of A/T-ECU earth circuit
D Malfunction of A/T-ECU
D Malfunction of harness and connector
Is communication with other systems
possible using the MUT-II?
No
Check and repair the self-diagnosis
system with the MUT-II
Yes
Measure at A/T-ECU connector D-04
D Disconnect the connector and
measure at the harness side.
D Voltage between terminals (9) and
(24) and the earth
OK: System voltage
D Continuity between terminal (25)
and earth
OK: Continuity
OK
Check the following connectors:
<L.H. drive vehicles> D-04, D-34, C-37,
C-70, C-35
<R.H. drive vehicles> D-04, D-34, C-39,
C-70, C-35
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the A/T-ECU.
NG
Check the following connectors:
<L.H. drive vehicles> D-02, C-24, C-78,
C-74, D-34, C-68, C-72
<R.H. drive vehicles> D-02, C-26, C-78,
C-74, D-34, C-68, C-72
NG
Repair
OK
Check the trouble symptoms.
NG
D Check and repair the harness wire
between the A/T-ECU and the
power supply.
D Check and repair the harness wire
between the A/T-ECU and the earth.
Check the trouble symptoms
NG
Replace the A/T-ECU.
To Next Page
Loading...
