DESCRIPTION
If a malfunction is detected in the power supply circuit, the skid control ECU (housed in the actuator assembly) stores this DTC and the fail safe function prohibits ABS operation.
This DTC is stored when the IG1 terminal voltage deviates from the DTC detection condition due to a malfunction in the power supply or charging circuit such as the battery or alternator circuit, etc.
The DTC is cleared when the IG1 terminal voltage returns to normal.
DTC Code | DTC Detection Condition | Trouble Area |
---|---|---|
C1241 | Any of the following is detected:
|
|
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
When replacing the brake actuator assembly, perform zero point calibration and store system information Click here.
PROCEDURE
INSPECT ECU-IG RH FUSE
*1 | Main Body ECU RH |
*2 | ECU-IG RH Fuse |
Remove the ECU-IG RH fuse from the main body ECU RH (cowl side junction block RH).
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE ECU-IG RH FUSE |
OK |
CHECK BATTERY
Install the ECU-IG RH fuse.
Check the battery voltage.
Standard Voltage |
---|
11 to 14 V |
NG |
CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2UR-GSE) Click here |
OK |
INSPECT SKID CONTROL ECU (IG1 TERMINAL)
*1 | Front view of wire harness connector (to Skid Control ECU) |
Make sure that there is no looseness at the locking part and the connecting part of the connectors.
Disconnect the skid control ECU connector.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) |
OK |
INSPECT SKID CONTROL ECU (GND1 TERMINAL)
*1 | Front view of wire harness connector (to Skid Control ECU) |
Turn the engine switch off.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT) |
OK |
RECONFIRM DTC
Reconnect the skid control ECU connector.
Clear the DTCs Click here.
Start the engine.
Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.
Check if the same DTC is recorded Click here.
Result | ||||||
---|---|---|---|---|---|---|
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Tech Tips
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step Click here.
B |
REPLACE BRAKE ACTUATOR ASSEMBLY Click here |
A |
CHECK FOR INTERMITTENT PROBLEMS Click here