DTC Code | DTC Name |
---|---|
C1203 | ECM Communication Circuit Malfunction |
C1270 | Initialization Incomplete (Test Mode DTC) |
DESCRIPTION
If the skid control ECU (brake actuator assembly) is replaced or if the memory is cleared, system information such as the destination or vehicle type will be unconfirmed. After switching to Test Mode, the skid control ECU (brake actuator assembly) performs initialization when starting communication with the vehicle, and stores the system information in 2 or 3 seconds.
DTC C1270 will be cleared when the initialization is completed normally or when Test Mode ends. DTC C1270 is output only in Test Mode.
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
C1203 |
|
|
C1270 | Detected only during Test Mode. |
|
INSPECTION PROCEDURE
Note
When replacing the brake actuator assembly, perform zero point calibration and store system information Click here.
PROCEDURE
CHECK PART NUMBER (ECM)
Check that the part number of the installed ECM is correct.
OK |
---|
ECM installed in the vehicle has the correct part number. |
Result | Proceed to |
---|---|
OK | A |
NG (for 2GR-FSE) | B |
NG (for 4GR-FSE) | C |
B |
REPLACE ECM Click here |
C |
REPLACE ECM Click here |
A |
CHECK PART NUMBER (FRONT STEERING CONTROL ECU [VGRS ECU])
For vehicles with the VGRS system, check that the part number of the installed front steering control ECU (VGRS ECU) is correct. For vehicles without the VGRS system, make sure that a front steering control ECU (VGRS ECU) is not installed.
OK |
---|
The presence or absence of the front steering control ECU (VGRS ECU) appropriately matches the specifications of the vehicle. |
Check if the front steering control ECU (VGRS ECU) had been replaced before the DTC was stored.
OK |
---|
ECU had not been replaced. |
NG |
REPLACE FRONT STEERING CONTROL ECU Click here |
OK |
CHECK PART NUMBER (REAR STEERING CONTROL ECU [DRS ECU])
For vehicles with the DRS system, check that the part number of the installed rear steering control ECU (DRS ECU) is correct. For vehicles without the DRS system, make sure that a rear steering control ECU (DRS ECU) is not installed.
OK |
---|
The presence or absence of the rear steering control ECU (DRS ECU) appropriately matches the specifications of the vehicle. |
Check if the rear steering control ECU (DRS ECU) had been replaced before the DTC was stored.
OK |
---|
ECU had not been replaced. |
NG |
REPLACE REAR STEERING CONTROL ECU Click here |
OK |
CLEAR AND STORE SYSTEM INFORMATION
Clear the system information Click here.
Store the system information Click here.
NEXT |
RECONFIRM DTC
Clear the DTCs Click here.
Check if the same DTC is recorded Click here.
Result | Proceed to |
---|---|
DTC (C1203) is not output | A |
DTC (C1203) is output | B |
B |
REPLACE BRAKE ACTUATOR ASSEMBLY Click here |
A |
CHECK FOR INTERMITTENT PROBLEMS Click here