caution | If diagnosis code
U0114 is set in the engine-ECU, surely perform CAN bus line diagnosis. |
caution | Replace ECU after certainly confirming that the communication
circuits are normal. |
note | In the case of past malfunctions, M.U.T.-III CAN bus line diagnosis cannot detect a malfunction
even if there is a malfunction in CAN bus. Therefore, check CAN bus line as in the case of response
to intermittent malfunctions (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunctions). It is possible to narrow
down areas with a high possibility of malfunctions from diagnosis codes set in each ECU that
performs CAN communication (Refer to GROUP 54C - Explanation about the M.U.T.-III CAN
Bus Diagnostics). |
DIAGNOSIS PROCEDURE |
STEP 1. M.U.T.-III CAN bus diagnosis |
|
Q.
Is the check result normal?
|
![]() |
|
![]() ![]() |
|
STEP 2. M.U.T.-III diagnosis code |
|
Q.
Is diagnosis code set?
|
![]() |
|
![]() |
|
STEP 3. M.U.T.-III diagnosis code |
Check that the other ECU performing CAN communication with transfer-ECU sets diagnosis
code No. U0114 [Refer to GROUP 54C - CAN Communication-related Diagnosis Code
(U-code) Table ![]() |
Q.
Is diagnosis code set?
|
![]() |
|
![]() |
|
STEP 4. M.U.T.-III diagnosis code |
|
Confirm again whether the diagnosis code is set in the engine-ECU. |
|
Q.
Is diagnosis code set?
|
![]() |
|
![]() |
|
STEP 5. M.U.T.-III diagnosis code |
|
Confirm again whether the diagnosis code is set in the engine-ECU. |
|
Q.
Is diagnosis code set?
|
![]() |
|
![]() |
|
STEP 6. M.U.T.-III diagnosis code |
|
Confirm again whether the diagnosis code is set in the engine-ECU. |
|
Q.
Is diagnosis code set?
|
![]() |
|
![]() |
|