Toyota Camry (XV70): 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. |
|
CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and system information memorization.
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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 for A25A-FKS: Click here for 2GR-FKS: Click here
|
|
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| 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
|
READ NEXT:
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DESCRIPTION The skid control ECU (brake actuator assembly) measures the speed of each wheel by receiving signals from each speed sensor.
These signals are used for recognizing that all four wheels a
Left Front Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12A512,...,C12B049)
DESCRIPTION The ABS solenoid relay and solenoid valves are built into the brake actuator assembly.
The front solenoid valve LH controls the brake fluid pressure of the front wheel cylinder LH of the
Right Front Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12BB12,...,C12C649)
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SEE MORE:
Components
COMPONENTS ILLUSTRATION
*1 BRAKE LINE
*2 BRAKE MASTER CYLINDER SUB-ASSEMBLY
Tightening torque for "Major areas involving basic vehicle performance such as moving/turning/stopping" : N*m (kgf*cm, ft.*lbf)
* For use with a union nut wrench ILLUSTRATION
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure.
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Before replacing the DCM (telematics transceiver), refer to Registration.
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HINT:
Use the table below to help determine the cause
