Code No. U0155 Meter CAN timeout
| caution |
- If diagnosis code No. U0155 is set, be sure to diagnose the CAN bus line.
- Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
|
DIAGNOSTIC FUNCTION
The headlamp automatic levelling-ECU sets diagnosis code No.U0155 when it cannot receive signals from the combination meter.
JUDGEMENT CRITERIA
The headlamp automatic levelling-ECU cannot receive the signal from the combination meter via the CAN bus line.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of combination meter
- Malfunction of headlamp automatic levelling-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting 
).
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set in the combination meter.
Q.
Is the diagnosis code set?
Troubleshoot the combination meter (Refer to ).
Go to Step 3.
STEP 3. M.U.T.-III other system diagnosis code
Check if a diagnosis code, which relates to CAN communication-linked systems below, is set.
Engine-ECU
- Code No.U0155: Meter CAN timeout
Q.
Is the diagnosis code set?
Go to Step 4.
Go to Step 5.
STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set in the headlamp automatic levelling-ECU.
|
|
(1)Erase the diagnosis code.
|
|
|
(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
|
|
|
(3)Check if the diagnosis code is set.
|
Q.
Is the diagnosis code set?
Replace the combination meter (Refer to ) and then go to Step 6.
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the headlamp automatic levelling-ECU and the combination meter. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
STEP 5. Diagnosis code recheck
Check again if the diagnosis code is set in the headlamp automatic levelling-ECU.
|
|
(1)Erase the diagnosis code.
|
|
|
(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
|
|
|
(3)Check if the diagnosis code is set.
|
Q.
Is the diagnosis code set?
Replace the headlamp automatic levelling-ECU (Refer to ) and then go to Step 6.
A poor connection, open circuit, or other intermittent malfunction in the CAN bus line between the headlamp automatic levelling-ECU and combination meter. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)
STEP 6. Check whether the diagnosis code is set again.
Recheck if the diagnosis code is set.
|
|
(1)Erase the diagnosis code.
|
|
|
(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
|
|
|
(3)On completion, check that the diagnosis code is not set again.
|
Q.
Is the diagnosis code set?
Go to Step 1.
The procedure is complete.