DESCRIPTION
If a malfunction is detected in the power supply circuit, the skid control ECU (housed in the brake actuator assembly) stores this DTC and the fail-safe function prohibits brake control system operation.
This DTC is stored when the IG1 terminal voltage deviates from the standard due to a malfunction in the power supply or charging circuit such as the battery, generator circuit, etc.
The DTC is cleared when the IG1 terminal voltage returns to normal.
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
C1241/41 | When any of the following is detected:
|
|
WIRING DIAGRAM
*a | from IG Circuit |
*b | ECU-IG NO. 1 |
*c | Skid Control ECU (Brake Actuator Assembly) |
CAUTION / NOTICE / HINT
Note
When replacing the skid control ECU (brake actuator assembly), perform the engine variant learning Click here.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)
Turn the ignition switch off.
Disconnect the skid control ECU connector.
*1 | Front view of wire harness connector (to Skid Control ECU) |
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (GND1, GND2 TERMINAL)
Turn the ignition switch off.
Disconnect the skid control ECU connector.
*1 | Front view of wire harness connector (to Skid Control ECU) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
RECONFIRM DTC
Clear the DTCs Click here.
Start the engine.
Perform a road test.
Check if the same DTC is output Click here.
Result | Proceed to |
---|---|
DTC C1241/41 is not output. | A |
DTC C1241/41 is output. | B |
A |
USE SIMULATION METHOD TO CHECK Click here |
B |
REPLACE BRAKE ACTUATOR ASSEMBLY Click here |