Dtc C1Aa6 Yaw Rate Sensor Zero Point Malfunction

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
Cruise Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

SYSTEM DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)

CHECK DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)

REPLACE FORWARD RECOGNITION CAMERA

CHECK DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)

DTC C1AA6 Yaw Rate Sensor Zero Point Malfunction


SYSTEM DESCRIPTION

The skid control ECU (master cylinder solenoid) receives vehicle stability signals from the yaw rate and acceleration sensor (airbag sensor assembly). If the skid control ECU (master cylinder solenoid) detects a yaw rate sensor zero point malfunction signal, it informs the forward recognition camera via CAN communication, and DTC C1AA6 is stored.

DTC No.
DTC Detection Condition
Trouble Area
C1AA6
While driving with the road sign assist system activated, a yaw rate sensor zero point malfunction signal sent from the skid control ECU (master cylinder solenoid) to the forward recognition camera is detected for 5 seconds or more.
  1. Vehicle stability control system
  2. Skid control ECU (master cylinder solenoid)
  3. Forward recognition camera

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
  2. If the forward recognition camera has been replaced with a new one, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust (Click here).
  3. First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting (Click here).
1.CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Trouble Codes.

  1. Check for DTCs (Click here).

Result:
Result
Proceed to
Vehicle stability control system DTCs are not output.
A
Vehicle stability control system DTCs are output.
B


B
GO TO VEHICLE STABILITY CONTROL SYSTEM (Click here)
A


2.CHECK DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes.

  1. Clear the DTCs (Click here).

  1. Make sure that the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.

  1. Check for DTCs (Click here).

Result:
Result
Proceed to
DTC C1AA6 is output.
A
DTC C1AA6 is not output.
B


B
USE SIMULATION METHOD TO CHECK (Click here)
A


3.REPLACE FORWARD RECOGNITION CAMERA

  1. Replace the forward recognition camera (Click here).

  1. Adjust the forward recognition camera (Click here).


NEXT


4.CHECK DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes.

  1. Clear the DTCs (Click here).

  1. Make sure that the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.

  1. Check for DTCs (Click here).

Result:
Result
Proceed to
DTC C1AA6 is output.
A
DTC C1AA6 is not output.
B


B
END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)
A

REPLACE MASTER CYLINDER SOLENOID (Click here)