Toyota Corolla Cross: ECM Communication (C124A00)
DESCRIPTION
If the vehicle information stored by the skid control ECU (brake actuator assembly) does not match that sent from the ECM or a new skid control ECU (brake actuator assembly) is installed and the vehicle information has not been stored, this DTC is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C124A00 |
ECM Communication |
Engine, drive source and destination information sent from the ECM does not match the information of the skid control ECU or there is no information in memory. |
|
PROCEDURE
|
1. |
CHECK PART NUMBER (ECM) |
(a) Check that the proper ECM is installed.
OK:
Proper ECM is installed.
(b) Check if the ECM was replaced before the DTC was stored.
OK:
ECM was not replaced.
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (A proper ECM is not installed and/or the ECM was replaced.) |
B |
| B | .gif)
|
REPLACE ECM |
|
.gif)
|
2. |
CHECK PART NUMBER (BRAKE ACTUATOR ASSEMBLY) |
(a) Check that a proper skid control ECU (brake actuator assembly) is installed.
OK:
Proper skid control ECU (brake actuator assembly) is installed.
(b) Check if the skid control ECU (brake actuator assembly) had been replaced before the DTC was stored.
OK:
Skid control ECU (brake actuator assembly) had not been replaced.
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (The skid control ECU (brake actuator assembly) had been replaced.) |
B |
|
NG (A proper skid control ECU (brake actuator assembly) is not installed.) |
C |
| A |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
| C |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
|
|
3. |
CONFIRM SYSTEM INFORMATION STORAGE |
(a) Check that Store System Information (acceleration sensor zero point calibration and system information memorization) has been performed.
OK:
Store System Information has been performed.
HINT:
After installing a new skid control ECU (brake actuator assembly), DTCs C051D54 and C124A00 will be stored until system variant learning (acceleration sensor zero point calibration and system information memorization) is performed.
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
|
PERFORM ACCELERATION SENSOR ZERO POINT CALIBRATION AND SYSTEM INFORMATION MEMORIZATION |
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