Dtc C1232/32 Stuck In Acceleration Sensor


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL)

INSPECT YAW RATE AND ACCELERATION SENSOR (GND TERMINAL)

DTC C1232/32 Stuck in Acceleration Sensor

DTC C1234/34 Yaw Rate Sensor Malfunction

DTC C1243/43 Acceleration Sensor Stuck Malfunction

DTC C1244/44 Open or Short in Acceleration Sensor Circuit

DTC C1245/45 Acceleration Sensor Output Malfunction

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

DTC C1381/97 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 branch lines between the yaw rate and acceleration sensor and the CAN communication system main bus lines, DTCs U0123/62 (yaw rate sensor communication trouble) and U0124/95 (acceleration sensor communication trouble) are output.
These DTCs are also output when calibration has not been completed.
DTC C1279/79 is deleted when the yaw rate and acceleration sensor sends an acceleration signal or Test Mode ends. DTC C1279/79 is output only in Test Mode.

DTC Code
DTC Detection Condition
Trouble Area
C1232/32
At a vehicle speed of 10 km/h (6 mph) or more, the signal from either GL1 or GL2 does not change for 30 seconds or more.
  1. Yaw rate and acceleration sensor (Yaw rate sensor assembly)
  2. Yaw rate and acceleration sensor circuit
C1234/34
With ECU IG1 terminal voltage between 9.5 and 17.4 V, the sensor malfunction signal is received from the yaw rate sensor.
  1. Yaw rate and acceleration sensor (Yaw rate sensor assembly)
  2. Yaw rate and acceleration sensor circuit
  3. Sensor installation
C1243/43
While the vehicle speed changes from 30 km/h (19 mph) to 0 km/h (0 mph), the condition that the output values of GL1 and GL2 do not change 0.0294 G or more occurs 16 times or more.
  1. Yaw rate and acceleration sensor (Yaw rate sensor assembly)
  2. Yaw rate and acceleration sensor circuit
C1244/44
When either condition below is met:
  1. A data malfunction signal is received from the acceleration sensor.
  2. After the difference between the output of GL1 and GL2 becomes 0.6 G or more with the vehicle stationary, the difference remains 0.4 G or more for 60 seconds or more.
  1. Yaw rate and acceleration sensor (Yaw rate sensor assembly)
  2. Yaw rate and acceleration sensor circuit
C1245/45
At a vehicle speed of 30 km/h (19 mph) or more, the difference between the forward and backward acceleration calculated from the acceleration sensor value and that calculated from the vehicle speed exceeds 0.35 G for 60 seconds or more.
  1. Yaw rate and acceleration sensor (Yaw rate sensor assembly)
  2. Yaw rate and acceleration sensor circuit
  3. Sensor installation
C1381/97
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. Yaw rate and acceleration sensor (Yaw rate sensor assembly)
  2. Yaw rate and acceleration sensor power source circuit
C1279/79
Detected only during Test Mode.
  1. Yaw rate and acceleration sensor (Yaw rate sensor assembly)
  2. Sensor installation

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control System. Dtc C1232/32 Stuck In Acceleration Sensor


INSPECTION PROCEDURE

NOTICE:
When replacing the yaw rate and acceleration sensor, perform zero point calibration (Toyota Fortuner RM000000XHR02TX.html).
HINT:
When U0123/62, U0124/95 and/or U0126/63 is output together with C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, and/or C1381/97, inspect and repair the trouble areas indicated by U0123/62, U0124/95 and/or U0126/63 first (Toyota Fortuner RM0000026QM00JX.html).
1.CHECK FOR DTC

  1. Clear the DTC(s) (Toyota Fortuner RM000000XHV09NX.html).

  1. Turn the ignition switch off.

  1. While driving the vehicle at a speed of 30 km/h (19 mph) or more, turn the steering wheel and decelerate the vehicle by depressing the brake pedal.

  1. Turn the ignition switch to ON again and check that no CAN communication system DTC is output (Toyota Fortuner RM000000XHV09NX.html).

  1. Check if DTCs indicating zero point calibration of the yaw rate sensor undone (C1210/36) or zero point calibration of the acceleration sensor undone (C1336/39) are output (Toyota Fortuner RM000000XHV09NX.html).

    Result
    Result
    		Proceed to
    DTC relating to yaw rate and acceleration sensor output
    		A
    DTC relating to CAN communication system output
    		B
    DTC C1210/36 and/or C1336/39 output
    		C


B
INSPECT CAN COMMUNICATION SYSTEM

C
REPAIR CIRCUIT INDICATED BY OUTPUT DTC
A


2.CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

  1. Turn the ignition switch off.

  1. Check that the yaw rate and acceleration sensor has been installed properly (Toyota Fortuner RM000000SS503DX.html).

    OK:
    The sensor is tightened to the specified torque.
    The sensor is not be tilted.


NG
INSTALL YAW RATE SENSOR ASSEMBLY CORRECTLY
OK


3.INSPECT YAW RATE AND ACCELERATION SENSOR (IG TERMINAL)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control System. Dtc C1232/32 Stuck In Acceleration Sensor

  1. Disconnect the yaw rate and acceleration sensor connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Y1-4 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V


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


4.INSPECT YAW RATE AND ACCELERATION SENSOR (GND TERMINAL)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Vehicle Stability Control System. Dtc C1232/32 Stuck In Acceleration Sensor

  1. Turn the ignition switch off.

  1. Disconnect the 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
    Y1-1 (GND) - Body ground
    		Always
    		Below 1 Ω
    NOTICE:
    Check the yaw rate and acceleration sensor signal after replacement (Toyota Fortuner RM000000XHT070X.html).
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Toyota Fortuner RM000000XHN092X.html).


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

REPLACE YAW RATE SENSOR ASSEMBLY