Dtc C1409 Front Speed Sensor Rh Performance

Brake. Land Cruiser. Urj200, 202 Grj200 Vdj200
Brake Control Dynamic Control Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

READ VALUE USING GTS (FR/FL WHEEL SPEED)

READ VALUE USING GTS (FR/FL WHEEL DIRECTION)

RECONFIRM DTC

DTC C1409 Front Speed Sensor RH Performance

DTC C1410 Front Speed Sensor LH Performance


DESCRIPTION

Refer to DTCs C1401 and C1402 (Click here).

DTC Code
DTC Detection Condition
Trouble Area
C1409
C1410
One of the following conditions is met:
  1. When the vehicle is driven in reverse at a speed of 3 km/h (2 mph) or more and 3 of the wheel sensors detect the reverse signal, the other sensor detects a high frequency pulse 75 times while the ignition switch is ON.
  2. At a vehicle speed of 10 km/h (6 mph) or more, the vehicle speed sensor output drops by 50% for 5 seconds.
  3. The lowest wheel speed is 10 km/h (6 mph) or more and the difference between the highest and lowest wheel speed values is 2 km/h (1 mph) or less for 15 seconds.
  4. At a vehicle speed of 30 km/h (19 mph) or more, one wheel direction is different from the other 3 wheels for 1 second.
  5. At a vehicle speed of 100 km/h (62 mph), a reverse signal is output for 1 second or more.
  6. At a vehicle speed of 30 km/h (19 mph) or more, the rotation direction of the one of the wheels is not detected normally and the rotation direction of the other 3 wheels is not the same for 1 second.
Front speed sensor RH/LH
HINT:
  1. DTC C1409 is for the front speed sensor RH.
  2. DTC C1410 is for the front speed sensor LH.

INSPECTION PROCEDURE

NOTICE:
Check the speed sensor signal after replacement (Click here).
1.READ VALUE USING GTS (FR/FL WHEEL SPEED)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Start the engine.

  1. Turn the GTS on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FR Wheel Speed
    		Front speed sensor RH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Actual wheel speed
    		No large fluctuations when driving at a constant speed.
    FL Wheel Speed
    		Front speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Actual wheel speed
    		No large fluctuations when driving at a constant speed.

  1. Check that there is no difference between the speed value output from the speed sensor displayed on the GTS and the speed value displayed on the speedometer when driving the vehicle.

    HINT:
    Factors that affect the indicated vehicle speed include tire size, tire inflation and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, refer to the reference chart (Click here).
    OK:
    The speed value output from the speed sensor displayed on the GTS is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).


NG
REPLACE FRONT SPEED SENSOR (Click here)
OK


2.READ VALUE USING GTS (FR/FL WHEEL DIRECTION)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Start the engine.

  1. Turn the GTS on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    FR Wheel Direction
    		Front wheel direction RH/ Forward or Back
    		Forward: Forward
    Back: Back
    		-
    FL Wheel Direction
    		Front wheel direction LH/ Forward or Back
    		Forward: Forward
    Back: Back
    		-

  1. Check the "FR/FL Wheel Direction" in the Data List both when the vehicle is being driven straight forward at a speed of 30 km/h (19 mph) or more and when the vehicle is being driven in reverse at a speed of 3 km/h (2 mph) or more.

    OK:
    The sensor signal matches wheel direction.


NG
REPLACE FRONT SPEED SENSOR (Click here)
OK


3.RECONFIRM DTC

  1. Clear the DTC (Click here).

  1. Turn the ignition switch off.

  1. Start the engine.

  1. Perform a road test.

  1. Check if the same DTC is output (Click here).

    Result
    Result
    		Proceed to
    DTC C1409 or C1410 is output
    		A
    DTC is not output
    		B



B
CHECK FOR INTERMITTENT PROBLEMS (Click here)
A

REPLACE FRONT SPEED SENSOR (Click here)