Dtc C1381 Acceleration Sensor Power Supply Voltage Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK TERMINAL VOLTAGE (IG)

CHECK HARNESS AND CONNECTOR (GND TERMINAL)

RECONFIRM DTC

DTC C1381 Acceleration Sensor Power Supply Voltage Malfunction


DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.
The yaw rate sensor has a built-in acceleration sensor and detects the vehicle's condition using 2 circuits (GL1, GL2).
If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the acceleration sensor) are stored.
These DTCs are also stored when calibration has not been completed.

DTC Code
DTC Detection Condition
Trouble Area
C1381
At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more.
  1. ECU-IG NO. 1 fuse
  2. Yaw rate and acceleration sensor
  3. Yaw rate and acceleration sensor power source circuit

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (LandCruiser RM000001EA302PX_02.html).

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the yaw rate and acceleration sensor, perform calibration (LandCruiser RM00000452K011X.html).
  2. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK TERMINAL VOLTAGE (IG)

  1. Disconnect the G52 yaw rate and acceleration sensor connector.



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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G52-4 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Yaw Rate and Acceleration Sensor)


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


2.CHECK HARNESS AND CONNECTOR (GND TERMINAL)

  1. Disconnect the G52 yaw rate and acceleration sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G52-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    NOTICE:
    Check the yaw rate and acceleration sensor signal after replacement (LandCruiser RM00000452K011X.html).


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


3.RECONFIRM DTC

  1. Reconnect the yaw rate and acceleration sensor connector.

  1. Clear the DTCs (LandCruiser RM0000046KV016X.html).

  1. Start the engine.

  1. Perform a road test.

  1. Check if the same DTC is output (LandCruiser RM0000046KV016X.html).

    Result
    Result
    		Proceed to
    DTC C1381 is not output
    		A
    DTC C1381 is output
    		B


B
REPLACE YAW RATE AND ACCELERATION SENSOR (LandCruiser RM000000SS507KX.html)
A

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)