AUTOMATIC TRANSMISSION ± Troubleshooting <A/T>
23-14
Code No. 55 Abnormal communication with engine-ECU Probable cause
If normal communication is not possible for a continuous period of 1 second or
more when the ignition switch is at the ON position and the battery voltage is 10
V or more, diagnosis code No. 55 is output. Diagnosis code No. 55 is also output
if the data being received is abnormal for a continuous period of 1 second under
the same conditions.
D Malfunction of harness or connector
D Malfunction of the engine-ECU
D Malfunction of the A/T-ECU
MUT-II Self-Diag code
D Is the diagnosis code No.61 output?
NO
YES
Check the following connectors:
<L.H. vehicles> C-19, C-25, D-34, D-04
<R.H. vehicles> C-19, C-26, D-34, D-04
NG
Repair
OK
Check the harness wire between engine-ECU and A/T-ECU.
NG
Repair
OK
Replace the engine-ECU.
Check the trouble symptoms.
NG
Replace the A/T-ECU.
Replace the A/T-ECU.
Check the trouble symptoms.
NG
To Next Page
Loading...
