Dtc C1Aa4 Yaw Rate Sensor Circuit

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

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)

CHECK DTC OUTPUT (LANE DEPARTURE ALERT SYSTEM)

REPLACE FORWARD RECOGNITION CAMERA

CHECK DTC OUTPUT (LANE DEPARTURE ALERT SYSTEM)

DTC C1AA4 Yaw Rate Sensor Circuit

DTC C1AA5 Yaw Rate Sensor Power Supply Voltage Circuit

DTC C1AA6 Yaw Rate Sensor Zero Point Malfunction


DESCRIPTION

The forward recognition camera receives vehicle stability signals from the yaw rate sensor assembly. If the yaw rate sensor assembly detects an abnormal yaw rate sensor signal or yaw rate sensor assembly power supply voltage, it informs the forward recognition camera via CAN communication, and DTC C1AA4 or C1AA5 is stored.
The skid control ECU (master cylinder solenoid) receives vehicle stability signals from the yaw rate sensor. 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
C1AA4
While the vehicle is being driven at 5 km/h (3 mph) or more, a signal from the yaw rate sensor indicating a malfunction in the yaw rate sensor (airbag sensor assembly) is detected by the forward recognition camera for 5 seconds or more.
  1. Vehicle stability control system
  2. Yaw rate and acceleration sensor (Airbag sensor assembly)
  3. Forward recognition camera
C1AA5
While the vehicle is being driven at 5 km/h (3 mph) or more, a signal from the yaw rate sensor indicating an abnormal yaw rate sensor (airbag sensor assembly) power supply voltage signal is detected by the forward recognition camera for 5 seconds or more.
C1AA6
While the vehicle is being driven at 5 km/h (3 mph) or more, a signal from the skid control ECU (master cylinder solenoid) indicating a malfunction in the yaw rate sensor zero point is detected by the forward recognition camera for 5 seconds or more.

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 forward recognition camera learning (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)
HINT:
If the yaw rate and acceleration sensor (airbag sensor assembly) is malfunctioning, DTCs for the vehicle stability control system will be stored. Troubleshoot the vehicle stability control system first.

  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/TRAC / 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 (LANE DEPARTURE ALERT 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 / LKA/LDA / Trouble Codes.

  1. Clear the DTCs (Click here).

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

    HINT:
    If the following procedure is not performed, the previously output DTC cannot be detected.
    1. Turn the engine switch on (IG) and wait 7 seconds or more.
    2. Drive the vehicle at a speed of 5 km/h (3 mph) or more.

  1. Check for DTCs (Click here).

Result:
Result
Proceed to
DTC C1AA4, C1AA5 or C1AA6 is output.
A
DTC C1AA4, C1AA5 and C1AA6 are 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 (LANE DEPARTURE ALERT 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 / LKA/LDA / Trouble Codes.

  1. Clear the DTCs (Click here).

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

    HINT:
    If the following procedure is not performed, the previously output DTC cannot be detected.
    1. Turn the engine switch on (IG) and wait 7 seconds or more.
    2. Drive the vehicle at a speed of 5 km/h (3 mph) or more.

  1. Check for DTCs (Click here).

Result:
Result
Proceed to
DTC C1AA4, C1AA5 and C1AA6 are not output.
A
DTC C1AA4, C1AA5 or C1AA6 is output.
B


B
REPLACE YAW RATE AND ACCELERATION SENSOR (AIRBAG SENSOR ASSEMBLY) (Click here)
A

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)