Dtc C1715 Front Acceleration Sensor Rh Malfunction

Suspension. Land Cruiser. Urj200, 202 Grj200 Vdj200
Suspension Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ACCELERATION SENSOR (DATA LIST)

RECONFIRM DTC OUTPUT

CHECK HARNESS AND CONNECTOR (ACCELERATION SENSOR - SUSPENSION CONTROL ECU)

INSPECT ACCELERATION SENSOR

DTC C1715 Front Acceleration Sensor RH Malfunction

DTC C1716 Front Acceleration Sensor LH Malfunction

DTC C1717 Rear Acceleration Sensor Malfunction

DTC C1796 Front Acceleration Sensor RH Malfunction (Test Mode DTC)

DTC C1797 Front Acceleration Sensor LH Malfunction (Test Mode DTC)

DTC C1798 Rear Acceleration Sensor Malfunction (Test Mode DTC)


DESCRIPTION

The acceleration sensor (up and down G sensor) detects the upward and downward acceleration of the vehicle, and outputs it as a voltage to the suspension control ECU. Up and down G sensors are installed in 3 locations: 1) the suspension control ECU, 2) the driver side instrument panel, and 3) the passenger side instrument panel. Each up and down G sensor independently detects the upward and downward acceleration. During a test mode inspection, the suspension control ECU reads the fluctuations in the signal of each sensor. When the sensor cannot detect +/-1.96 m/s2 for 1 second or more during test mode, DTCs C1796, C1797 and C1798 are stored.

DTC Code
Detection Condition
Trouble Area
C1715
C1796
When either of the following conditions is met:
  1. With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the front acceleration sensor RH is detected for 1 second.
  2. When there is a front acceleration sensor RH power supply voltage malfunction.
  1. Harness or connector
  2. Front acceleration sensor RH
  3. Suspension control ECU
C1716
C1797
When either of the following conditions is met:
  1. With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the front acceleration sensor LH is detected for 1 second.
  2. When there is a front acceleration sensor LH power supply voltage malfunction.
  1. Harness or connector
  2. Front acceleration sensor LH
  3. Suspension control ECU
C1717
C1798
When either of the following conditions is met:
  1. With the engine switch on (IG), a voltage of 4.7 V or higher, or 0.3 V or less at the rear acceleration sensor is detected for 1 second.
  2. When there is a rear acceleration sensor power supply voltage malfunction.
Suspension control ECU (Houses rear acceleration sensor)

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1715 Front Acceleration Sensor Rh Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. Before performing troubleshooting, inspect the connectors of related circuits.
  2. If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed (Click here).
  3. If DTCs C1717 and C1798 (Rear Acceleration Sensor Malfunction) are stored, replace the suspension control ECU (houses rear acceleration sensor).
1.CHECK ACCELERATION SENSOR (DATA LIST)

  1. Turn the engine switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and the tester on.

  1. Enter the following menus: Chassis / AHC / Data List.

  1. According to the display on the tester, read the Data List.

    AHC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    (Up & Down)G Sensor FR
    		G (up and down) front acceleration sensor RH reading/
    min.: -1045.29 m/s2
    max.: 1045.26 m/s2
    		0 +/-0.98 m/s2 at still condition
    		Reading changes when vehicle (FR) is bounced
    (Up & Down)G Sensor FL
    		G (up and down) front acceleration sensor LH reading/
    min.: -1045.29 m/s2
    max.: 1045.26 m/s2
    		0 +/-0.98 m/s2 at still condition
    		Reading changes when vehicle (FL) is bounced
    (Up & Down)G Sensor Rear
    		G (up and down) rear acceleration sensor reading/
    min.: -1045.29 m/s2
    max.: 1045.26 m/s2
    		0 +/-0.98 m/s2 at still condition
    		Reading changes when vehicle (rear) is bounced
    OK:
    Reading changes when vehicle is bounced.


NG
Go to step 3
OK


2.RECONFIRM DTC OUTPUT

  1. Clear the DTCs (Click here).

  1. Perform a road test.

  1. Check for DTCs.

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


B
USE SIMULATION METHOD TO CHECK (Click here)
A


3.CHECK HARNESS AND CONNECTOR (ACCELERATION SENSOR - SUSPENSION CONTROL ECU)
NOTICE:
When inspecting the wire harnesses between the suspension control ECU and acceleration sensors, it is difficult to determine the malfunctioning area if there is a sensor power supply malfunction. Therefore, disconnect the connectors for the acceleration sensors (front RH, front LH), the fluid temperature sensor, and fluid pressure sensor on the ECU side.


  1. Check the front acceleration sensor RH side: (C1715)


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1715 Front Acceleration Sensor Rh Malfunction

    1. Disconnect the K34 and K35 ECU connectors.

    2. Disconnect the L35 sensor connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      L35-1 (SGFR) - K34-24 (SGFR)
      		Always
      		Below 1 Ω
      L35-2 (SGG) - K34-14 (SGG1)
      		Always
      		Below 1 Ω
      L35-3 (SGB) - K34-15 (SGB1)
      		Always
      		Below 1 Ω
      K34-24 (SGFR) - Body ground
      		Always
      		10 kΩ or higher
      K34-14 (SGG1) - Body ground
      		Always
      		10 kΩ or higher
      K34-15 (SGB1) - Body ground
      		Always
      		10 kΩ or higher


  1. Check the front acceleration sensor LH side: (C1716)

    1. Disconnect the K34 and K35 ECU connectors.



    2. Disconnect the K37 sensor connector.


      Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1715 Front Acceleration Sensor Rh Malfunction

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      K37-1 (SGFL) - K34-22 (SGFL)
      		Always
      		Below 1 Ω
      K37-2 (SGG) - K34-13 (SGG2)
      		Always
      		Below 1 Ω
      K37-3 (SGB) - K34-23 (SGB2)
      		Always
      		Below 1 Ω
      K34-22 (SGFL) - Body ground
      		Always
      		10 kΩ or higher
      K34-13 (SGG2) - Body ground
      		Always
      		10 kΩ or higher
      K34-23 (SGB2) - Body ground
      		Always
      		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT ACCELERATION SENSOR

Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1715 Front Acceleration Sensor Rh Malfunction

  1. Turn the engine switch off.

  1. Remove the front acceleration sensor (Click here).

    NOTICE:
    Do not drop the acceleration sensor. If it is dropped, replace it with a new one.

  1. Connect 3 1.5 V dry cell batteries in series.

  1. Connect the positive (+) end of the batteries to terminal 3 (SGB) of the acceleration sensor and the negative (-) end of the batteries to terminal 2 (SGG). Then measure the voltage between terminal 1 (SGFR*1, SGFL*2) and terminal 2 (SGG).

    HINT:
    *1: for RH
    *2: for LH
    NOTICE:
    Do not apply a voltage of more than 6 V.
    HINT:
    The voltage may differ according to the amount that the sensor is tilted.

    Standard Voltage:
    for RH
    Tester Connection
    		Condition
    		Specified Condition
    1 (SGFR) - 2 (SGG)
    		Sensor stationary
    		Approx. 2.0 to 2.5 V
    Sensor is tilted
    		Change between approx. 0.9 to 2.3 V
    for LH
    Tester Connection
    		Condition
    		Specified Condition
    1 (SGFL) - 2 (SGG)
    		Sensor stationary
    		Approx. 2.0 to 2.5 V
    Sensor is tilted
    		Change between approx. 0.9 to 2.3 V


NG
REPLACE ACCELERATION SENSOR (Click here)
OK

REPLACE SUSPENSION CONTROL ECU (Click here)