Specifications

AUTOMATIC TRANSMISSION -
Troubleshooting
23-27
Trouble symptom Reference
page
Inspection
procedure No.
Displaced shifting points All points 11 23-33
Some points 12 23-34
Does not shift No diagnosis codes 13 23-34
Malfunction while driving Poor acceleration 14 23-35
Vibration 15 23-35
Inhibitor switch system 16 23-36
Mode control switch system 17 23-36
Idle position switch system 18 23-37
Dual pressure switch system 19 23-37
Vehicle speed sensor system 20 23-38
Auto-cruse-ECU signal system 21 23-38
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with MUT-
II
is not possible
Probable cause
If communication with the MUT-II is not possible, the cause is probably a defective
diagnosis line or the A/T-ECU is not functioning.
D
Malfunction of diagnosis line
D
Malfunction of connector
D
Malfunction of the A/T-ECU
Is communication with other systems
possible using the MUT-II?
No
Check the diagnosis line with MUT-II,
and repair if necessary.
Yes
Check the continuity and voltage of the
A/T-ECU connector.
D
Disconnect the connector C-28 and
check at harness side.
D
Voltage between terminals No. 11,
24 and earth
OK:
Battery voltage
D
Voltage between C-28 terminals
Nos.12, 13, 25, 26, C-30 terminal
No. 72 and earth
OK:
Continuity
NG
Check the following connectors:
C-28, C-30, C-45, C-83, C-131, C-134
NG
Repair
OK
Harness check
D
Between power supply and
A/T-ECU
D
Between earth and A/T-ECU
NG
Repair
OK
Check the trouble symptoms.
NG
Repalce the A/T-ECU.
OK
Check the following connectors:
C-20, C-28, C-30, C-49, C-66, C-83
NG
Repair
OK
Harness check
D
Between diagnosis connector and
A/T-ECU
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the A/T-ECU.