Dtc C1241/41 Low Battery Positive Voltage Or Abnormally High Battery Positive Voltage

Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT ECU-IG NO. 1 FUSE

CHECK BATTERY

INSPECT SKID CONTROL ECU (IG1 TERMINAL)

INSPECT SKID CONTROL ECU (GND1 TERMINAL)

RECONFIRM DTC

DTC C1241/41 Low Battery Positive Voltage or Abnormally High Battery Positive Voltage


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 cancelled when the IG1 terminal voltage returns to normal.

DTC Code
DTC Detection Condition
Trouble Area
C1241/41
Any of the following is detected:
  1. At a vehicle speed of 3 km/h (2 mph) or more, the IG1 terminal voltage is less than 9.5 V for 10 seconds or more.
  2. When the solenoid relay remains ON and the IG1 terminal voltage is less than 9.5 V, the relay contact is open for 0.2 seconds or more.
  3. When the motor relay remains on and the IG1 terminal voltage is less than 9.5 V, the relay contact is open for 0.2 seconds or more.
  4. The IG1 terminal voltage is more than 17.4 V for 0.8 seconds or more.
  1. ECU-IG NO. 1 fuse
  2. Battery
  3. Charging system
  4. Power source circuit
  5. Internal power supply circuit of the skid control ECU

WIRING DIAGRAM


Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage Or Abnormally High Battery Positive Voltage


INSPECTION PROCEDURE

1.INSPECT ECU-IG NO. 1 FUSE


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage Or Abnormally High Battery Positive Voltage

  1. Remove the ECU-IG NO. 1 fuse from the main body ECU (instrument panel junction block).

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    ECU-IG NO. 1 (10 A) fuse
    		Always
    		Below 1 Ω


NG
REPLACE ECU-IG NO. 1 FUSE
OK


2.CHECK BATTERY

  1. Install the ECU-IG NO. 1 fuse.

  1. Check the battery voltage.

    Standard Voltage:
    11 to 14 V


NG
CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2ZR-FE) (COROLLA_ZRE142 RM000001AR909SX.html)
OK


3.INSPECT SKID CONTROL ECU (IG1 TERMINAL)


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage Or Abnormally High Battery Positive Voltage

  1. Disconnect the skid control ECU connector.

  1. Turn the ignition switch to ON.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A51-34 (IG1) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)
OK


4.INSPECT SKID CONTROL ECU (GND1 TERMINAL)


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage Or Abnormally High Battery Positive Voltage

  1. Turn the ignition switch off.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A51-1 (GND1) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)
OK


5.RECONFIRM DTC

  1. Reconnect the skid control ECU connector.

  1. Clear the DTCs (COROLLA_ZRE142 RM000000XHV0F3X.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 6 km/h (4 mph) or more.

  1. Check if the same DTC is recorded (COROLLA_ZRE142 RM000000XHV0F3X.html).

    Result:

    Result
    		Proceed to
    DTC (C1241/41) is not output
    		A
    DTC (C1241/41) is output
    		B
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (COROLLA_ZRE142 RM000000XHN0DVX.html).


B
REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM0000013P6022X.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (COROLLA_ZRE142 RM000000XHP0ELX.html)