Code No. U1108 Combination
meter CAN timeout
caution |
- If the diagnosis
code No. U1108 is set, diagnose the CAN bus lines.
- When replacing the ECU, always check that the SRS circuit is normal.
|
FUNCTION
If the signal from combination meter cannot be received, the SRS-ECU sets the diagnosis
code No. U1108.
TROUBLE JUDGEMENT
Because of the CAN-B bus circuit malfunction, if SRS-ECU becomes unable to perform the
normal data transmission, SRS-ECU determines that an abnormality is present.
PROBABLE CAUSES
- Malfunction of CAN bus line
- Malfunction of SRS-ECU
- Malfunction of the combination meter
|
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 ).
On completion, go to Step 5.
|
|
|
|
STEP 2. Check the M.U.T.-III Diagnosis code for other systems
|
|
Check that the combination meter set a diagnosis code.
|
|
Q.
Is the diagnosis code set?
|
|
Diagnose the combination meter. Refer to GROUP 54A, Troubleshooting .
|
|
|
|
Go to Step 3
|
|
|
|
STEP 3. Check whether the diagnosis code is reset.
|
|
Check again if the diagnosis code is set to the SRS-ECU.
|
|
(1)Erase the diagnosis code.
|
|
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
|
|
(3)On completion, check that the diagnosis code is reset.
|
|
Q.
Is the diagnosis code set?
|
|
Replace the combination meter. After replacing the combination meter, carry out
the CAN bus diagnostics. Then go to Step 4.
|
|
|
|
A poor connection, open circuit or other intermittent malfunction is present in
the CAN bus lines between the combination meter and the SRS-ECU (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunctions ).
|
|
|
|
STEP 4. Check whether the diagnosis code is reset.
|
|
Check again if the diagnosis code is set to the SRS-ECU.
|
|
(1)Erase the diagnosis code.
|
|
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
|
|
(3)On completion, check that the diagnosis code is not reset.
|
|
Q.
Is the diagnosis code set?
|
|
Replace the SRS-ECU. After replacing the ECU, carry out the CAN bus diagnostics.
Then go to Step 5.
|
|
|
|
A poor connection, open circuit or other intermittent malfunction is present in
the CAN bus lines between the combination meter and the SRS-ECU (Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points -
How to Cope with Intermittent Malfunctions ).
|
|
|
|
STEP 5. Check whether the diagnosis code is reset.
|
|
Recheck if the diagnosis code is set to the SRS-ECU.
|
|
(1)Erase the diagnosis code.
|
|
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
|
|
(3)On completion, check that the diagnosis code is reset.
|
|
Q.
Is the diagnosis code set?
|
|
Return to Step 1.
|
|
|
|
The procedure is complete.
|
|
|