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 ASTC-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 ASTC 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 ASTC system diagnosis codes are set or not.
Q.
Is the diagnosis code set?
Diagnose the ASTC 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 "LOCK" (OFF) position to "ON" position.
|
|
(3)Check if diagnosis code is set.
|
Q.
Is the diagnosis code set?
Replace the ASTC-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 "LOCK" (OFF) position to "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
).