Dtc C1241/41 Low Battery Positive Voltage

Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Brake Control. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (ECU-IG1)

INSPECT BATTERY

CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY)

CHECK WIRE HARNESS (SKID CONTROL ECU - BODY GROUND)

RECONFIRM DTC

DTC C1241/41 Low Battery Positive Voltage


DESCRIPTION

When there is an abnormality in the power supply circuit of the brake actuator (skid control ECU), the skid control ECU sets a DTC and the operation is prohibited by the fail-safe function. This DTC is set when the voltage supplied to terminal IG1 is outside the DTC detection threshold, due to abnormalities of the battery, power source circuits or charging circuits, such as the alternator circuit.
The fail-safe function is canceled when the voltage to terminal IG1 returns to normal.

DTC No.
DTC Detection Condition
Trouble Area
C1241/41
When one of following conditions is met:
  1. At vehicle speed of 3 km/h (2 mph) or more, IG1 terminal voltage is 9.5 V or less for 10 seconds or more.
  2. When solenoid relay remains ON and IG1 terminal voltage is 9.5 V or less, relay contact open for 0.2 seconds or more.
  3. When motor relay remains ON and IG1 terminal voltage becomes 9.5 V or less, actuator pump motor is OFF for 0.1 seconds or more.
  4. When IG1 terminal voltage is 9.5 V or less, vehicle speed sensor power supply decreases for 60 seconds or more.
  1. Battery
  2. Charging system
  3. Power source circuit
  4. Internal power supply circuit of skid control ECU

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage


INSPECTION PROCEDURE

1.INSPECT FUSE (ECU-IG1)

  1. Remove the ECU-IG1 fuse from the instrument panel junction block.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


2.INSPECT BATTERY

  1. Check the battery voltage.

    Standard voltage:
    11 to 14 V


NG
CHECK CHARGING SYSTEM
OK


3.CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage

  1. Disconnect the A27 ECU connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A27-25 (IG1) - Body ground
    		Ignition switch ON
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


4.CHECK WIRE HARNESS (SKID CONTROL ECU - BODY GROUND)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage

  1. Disconnect the A27 ECU connector.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    A27-2 (GND1) - Body ground
    		Below 1 Ω
    A27-24 (GND2) - Body ground
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.RECONFIRM DTC

  1. Clear the DTC (RAV4_ACA30 RM000000ONJ026X.html).

  1. Drive the vehicle at 3 km/h (2 mph) or more for several seconds.

  1. Check if the same DTC is output (RAV4_ACA30 RM000000ONJ026X.html).

    Result
    Result
    		Proceed to
    DTC is output
    		A
    DTC is not output
    		B


B
USE SIMULATION METHOD TO CHECK (RAV4_ACA30 RM00000135201PX.html)
A

REPLACE BRAKE ACTUATOR ASSEMBLY (RAV4_ACA30 RM000001XV200OX.html)