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

Brake. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Brake Control Dynamic Control Systems. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT BATTERY

CHECK TERMINAL VOLTAGE (IG1 TERMINAL)

CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

RECONFIRM DTC

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


DESCRIPTION

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 generator circuit, etc.

DTC Code
DTC Detection Condition
Trouble Area
C1241/41
Either condition is met:
  1. Both conditions continue for at least 10 seconds.
    1. Vehicle speed is more than 3 km/h (2 mph).
    2. The IG1 terminal voltage is below 9.5 V.
  2. All conditions continue for at least 0.2 seconds
    1. Solenoid relay remains on.
    2. Relay contact is open.
    3. The IG1 terminal voltage is below 9.5 V.
  1. ECU-IG&GAUGE fuse
  2. Battery
  3. Charging system
  4. Power source circuit
  5. Internal power supply circuit of skid control ECU (Brake actuator assembly)

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1241/41 Low Battery Positive Voltage Or Abnormally High Battery Positive Voltage


INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  2. Before disconnecting the connector, make sure that there are no problems with the connection.
  3. After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.
1.INSPECT BATTERY

  1. Check the battery voltage.

    Standard voltage:
    11 to 14 V
    HINT:
    If the value is not as specified, refer to Charging System / On-vehicle Inspection:
    1. for 1KD-FTV (HILUX_TGN26 RM0000013Y001JX.html)
    2. for 2KD-FTV (HILUX_TGN26 RM0000013Y001IX.html)
    3. for 2TR-FE (HILUX_TGN26 RM000000V4301SX.html)
    4. for 2TR-FBE (HILUX_TGN26 RM000000V4301WX.html)
    5. for 1GR-FE (HILUX_TGN26 RM000000V43024X.html)


NG
CHECK OR REPLACE CHARGING SYSTEM OR BATTERY
OK


2.CHECK TERMINAL VOLTAGE (IG1 TERMINAL)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.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. Disconnect the skid control ECU (brake actuator assembly) connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    A13-25 (IG1) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Skid Control ECU [Brake Actuator Assembly])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.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. Disconnect the skid control ECU (brake actuator assembly) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A13-2 (GND1) - Body ground
    		Always
    		Below 1 Ω
    A13-24 (GND2) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Skid Control ECU [Brake Actuator Assembly])


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.RECONFIRM DTC

  1. Clear the DTC (HILUX_TGN26 RM000000XHV0CFX.html).

  1. Turn the ignition switch off.

  1. Start the engine.

  1. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

  1. Check if the same DTC is output (HILUX_TGN26 RM000000XHV0CFX.html).

    Result
    Result
    		Proceed to
    DTC not output
    		A
    DTC 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 (HILUX_TGN26 RM000000XHN0D2X.html).


B
REPLACE BRAKE ACTUATOR ASSEMBLY (HILUX_TGN26 RM0000010K001CX.html)
A

USE SIMULATION METHOD TO CHECK (HILUX_TGN26 RM000004QR7005X.html)