Dtc C1243/43 Deceleration Sensor Stuck Malfunction

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

READ VALUE USING INTELLIGENT TESTER (DECELERATION SENSOR1)

RECONFIRM DTC

INSPECT DECELERATION SENSOR

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - DECELERATION SENSOR)

DTC C1243/43 Deceleration Sensor Stuck Malfunction

DTC C1244/44 Open or Short in Deceleration Sensor Circuit

DTC C1245/45 Deceleration Sensor Output Malfunction

DTC C1279/79 Deceleration Sensor Output Voltage Malfunction (Test Mode DTC)


DESCRIPTION

This sensor detects deceleration of the vehicle speed. The sensor signal is used in ABS control. If the sensor functions abnormally, the ABS warning light turns on.

DTC Code
DTC Detection Condition
Trouble Area
C1243/43
While the vehicle speed decreases from 30 km/h (18 mph) to 0 km/h (0 mph), the sensor signal does not change 16 times or more.
  1. Deceleration sensor
  2. Deceleration sensor circuit
  3. Skid control ECU (Brake actuator assembly)
C1244/44
One of the following conditions is met:
  1. Deceleration sensor signal value of -1.5 G or less or 1.5 G or more continues for 1.2 seconds or more.
  2. Deceleration sensor power supply terminal VGS voltage of 4.75 V or less or 5.25 V or higher continues for 1.2 seconds or more.
  3. Deceleration sensor signal momentary open occurs 7 times or more.
  1. Deceleration sensor
  2. Deceleration sensor circuit
  3. Skid control ECU (Brake actuator assembly)
C1245/45
At a vehicle speed of 30 km/h (18 mph) or more, the difference between the forward and rearward G value calculated using sensor signals and the forward and rearward G value calculated using the vehicle speed exceeds 0.35 G for 60 seconds or more.
  1. Deceleration sensor
  2. Deceleration sensor circuit
  3. Sensor installation
  4. Skid control ECU (Brake actuator assembly)
C1279/79
Detected only during Test Mode.
  1. Deceleration sensor
  2. Sensor installation

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1243/43 Deceleration Sensor Stuck Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. Before disconnecting the connector, make sure that there are no problems with the connection.
  2. After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.
1.READ VALUE USING INTELLIGENT TESTER (DECELERATION SENSOR1)

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Deceleration Sensor1
    		Deceleration sensor 1 reading/
    Min.: -1.86 G
    Max.: 1.85 G
    		Changes continuously during acceleration/deceleration
    		-

  1. Check that the deceleration value of the deceleration sensor displayed on the intelligent tester changes when the vehicle is tilted.

    OK:
    Changes continuously during acceleration/deceleration.


NG
Go to step 3
OK


2.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 30 km/h (18 mph) or more for 60 seconds or more.

  1. Check if the same DTCs are output (HILUX_TGN26 RM000000XHV0CFX.html).

    Result
    Result
    		Proceed to
    DTC output
    		A
    DTC not output
    		B


B
USE SIMULATION METHOD TO CHECK (HILUX_TGN26 RM000004QR7004X.html)
A

REPLACE BRAKE ACTUATOR ASSEMBLY (HILUX_TGN26 RM0000010K0019X.html)

3.INSPECT DECELERATION SENSOR

  1. Turn the ignition switch off.

  1. Remove the deceleration sensor (HILUX_TGN26 RM0000010JX01AX.html).

  1. Inspect the deceleration sensor (HILUX_TGN26 RM0000010JV014X.html).



NG
REPLACE DECELERATION SENSOR (HILUX_TGN26 RM0000010JX01AX.html)
OK


4.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - DECELERATION SENSOR)

  1. Turn the ignition switch off.

  1. Disconnect the skid control ECU (brake actuator assembly) connector.

  1. Disconnect the deceleration sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A13-28 (VGS) - K5-3 (VGS)
    		Always
    		Below 1 Ω
    A13-28 (VGS) - Body ground
    		Always
    		10 kΩ or higher
    A13-7 (GGND) - K5-2 (GGND)
    		Always
    		Below 1 Ω
    A13-7 (GGND) - Body ground
    		Always
    		10 kΩ or higher
    A13-4 (GL1) - K5-1 (GL1)
    		Always
    		Below 1 Ω
    A13-4 (GL1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (HILUX_TGN26 RM0000010K0019X.html)