5A-76 Automatic Transmission/Transaxle:
DTC Troubleshooting
NOTE
Upon completion of inspection and repair work, perform “Intermittent and Poor Connection Inspection
in Section 00” and confirm that the trouble has been corrected.
Step
Action
Yes
No
1
Was “A/T System Check” performed?
Go to Step 2.
Go to “A/T System
Check”.
2
Control module connector check
1) Check connection of connectors of all control modules
communicating by means of CAN.
2) Recheck DTC in TCM.
Is there DTC U0073?
Go to Step 3.
Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
3
CAN communication circuit check
1) Turn ignition switch to OFF position.
2) Disconnect connectors of all control modules
communicating by means of CAN.
3) Check CAN communication circuit between control
modules for open, short and high resistance.
Is each CAN communication circuit in good condition?
Go to Step 4.
Repair circuit.
4
DTC check
1) Turn ignition switch to OFF position.
2) Connect connectors of disconnected control modules
communicating by means of CAN.
3) Disconnect connector of any one of control module other
than TCM.
4) Recheck DTC for TCM.
Is DTC U0073 detected?
Disconnect connectors
of control modules other
than the one whose
connector is
disconnected in Step 3)
one by one and check
that DTC U0073 is
detected by TCM each
time connector is
disconnected. When
DTC U0073 is not
detected by TCM while
checking in this way, go
to description under
“NO” below. If DTC
U0073 is detected by
TCM even when
connectors of all control
modules that use CAN
communication with
TCM are disconnected,
substitute a known good
TCM and recheck.
Check power and
ground circuit of control
module disconnected in
Step 3). If circuit is OK,
substitute a known good
control module
disconnected in Step 3)
and recheck.