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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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
Right Front Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12BB12,...,C12C649)
DESCRIPTION
The ABS solenoid relay and solenoid valves are built into the
brake actuator assembly.
The front solenoid valve RH controls the brake fluid pressure
of the front wheel cylinder RH of
Left Rear Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12D112,...,C12DC49)
DESCRIPTION
The ABS solenoid relay and solenoid valves are built into the
brake actuator assembly.
The rear solenoid valve LH controls the brake fluid pressure
of the rear wheel cylinder LH of t
SEE MORE:
Auto Up Operation does not Fully Close Power Window (Jam Protection Function is Activated)
DESCRIPTION If a door glass does not slide smoothly or a power window regulator motor assembly or door window regulator sub-assembly does not operate smoothly, the jam protection function may be triggered automatically, resulting in the auto up operation being unable to fully close the power window.
Installation
INSTALLATION CAUTION / NOTICE / HINT COMPONENTS (INSTALLATION)
Procedure Part Name Code
1 CAMSHAFT TIMING VALVE ASSEMBLY (EXHAUST CAMSHAFT TIMING GEAR BOLT ASSEMBLY)
135A0B
- -
2 CAM TIMING OIL CONTROL SOLENOID ASSEMBLY
15
