Code No. C2245
Vehicle speed abnormality
OPERATION
The clearance warning control unit sets diagnosis code No. C2245 when it receives an invalid
or unfeasible vehicle speed signal from the ASC-ECU.
TROUBLE JUDGEMENT
Any of the conditions below is satisfied:
- An invalid vehicle speed signal persists for at least 1.5 seconds.
- An abnormal vehicle speed signal persists.
PROBABLE CAUSES
- Malfunction of CAN bus
- Malfunction of ASC system (Vehicle speed sensor)
- Malfunction of clearance warning control unit
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 whether the ASC system diagnosis codes are set or not.
Q.
Is the diagnosis code set?
Diagnose the ASC system (GROUP 35C - Troubleshooting 
).
Go to Step 3.
STEP 3. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the clearance warning control unit.
|
|
(1)Erase the diagnosis code.
|
|
|
(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
|
|
|
(3)Check if diagnosis code is set.
|
Q.
Is the diagnosis code set?
Replace the ASC-ECU, and then go to Step 4.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).
STEP 4. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the clearance warning control unit.
|
|
(1)Erase the diagnosis code.
|
|
|
(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
|
|
|
(3)Check if diagnosis code is set.
|
Q.
Is the diagnosis code set?
Replace the clearance warning control unit (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).