Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit

Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Brake Control. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

READ VALUE USING INTELLIGENT TESTER (RR/RL WHEEL SPEED)

RECONFIRM DTC

CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR)

INSPECT SKID CONTROL ECU (SENSOR INPUT)

DTC C1407 Open or Short in Rear Speed Sensor RH Circuit

DTC C1408 Open or Short in Rear Speed Sensor LH Circuit


DESCRIPTION

The speed sensor detects wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for ABS/VSC/TRC control.
Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn.
Each speed sensor detects that magnetic change and sends a pulse signal to the skid control ECU.

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit


DTC Code
DTC Detection Condition
Trouble Area
C1407
C1408
Either of the following is detected:
  1. An open in the speed sensor signal circuit continues for 0.5 seconds or more.
  2. With the IG1 terminal voltage 9.5 V or higher, the sensor power supply voltage decreases for 0.5 seconds or more.
  1. Rear speed sensor RH/LH
  2. Speed sensor circuit
  3. Brake actuator assembly (Skid control ECU)
HINT:
  1. DTC C1407 is for the rear speed sensor RH.
  2. DTC C1408 is for the rear speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1403 and C1404 (RAV4_ACA30 RM00000369R00BX_02.html).

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (RAV4_ACA30 RM000001K1O00SX.html).
1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

  1. Using the intelligent tester, check for any momentary interruption in the wire harness and connector corresponding to the DTC (RAV4_ACA30 RM000000XHS04QX.html).

    ABS/VSC/TRC:
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    RR Speed Open
    		RR speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-
    RL Speed Open
    		RL speed sensor open detection / ERROR or NORMAL
    		ERROR: Momentary interruption
    NORMAL: Normal
    		-
    Result:
    Result
    		Proceed to
    There are no momentary interruptions.
    		A
    There are momentary interruptions.
    		2WD
    		B
    4WD
    		C
    HINT:
    Perform the above inspection before removing the sensor and connector.


B
Go to step 4

C
Go to step 5
A


2.READ VALUE USING INTELLIGENT TESTER (RR/RL WHEEL SPEED)

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Select the Data List mode on the intelligent tester (RAV4_ACA30 RM000000ONK01EX.html).

    ABS/VSC/TRC:
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    RR Wheel Speed
    		RR wheel speed sensor reading / min.: 0 km/h (0 mph), max.: 326.4 km/h (202.8 mph)
    		Actual wheel speed
    		Similar to speed indicated on the speedometer.
    RL Wheel Speed
    		RL wheel speed sensor reading /min.: 0 km/h (0 mph), max.: 326.4 km/h (202.8 mph)
    		Actual wheel speed
    		Similar to speed indicated on the speedometer.

  1. Check that there is no difference between the speed value output from the speed sensor displayed on the intelligent tester 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, see the reference chart (RAV4_ACA30 RM0000020M9001X.html).
    OK:
    The speed value output from the speed sensor displayed on the intelligent tester is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).
    Result:
    Result
    		Proceed to
    OK
    		A
    NG
    		2WD
    		B
    4WD
    		C


B
Go to step 4

C
Go to step 5
A


3.RECONFIRM DTC

  1. Turn the ignition switch off.

  1. Clear the DTCs (RAV4_ACA30 RM000000ONJ027X.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is output (RAV4_ACA30 RM000000ONJ027X.html).

    Result:
    Result
    		Proceed to
    DTCs (C1407 and C1408) are not output.
    		A
    DTCs (C1407 and/or C1408) are output.
    		B
    HINT:
    If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (RAV4_ACA30 RM000000OS701UX.html).


B
REPLACE BRAKE ACTUATOR ASSEMBLY (RAV4_ACA30 RM000001XV200PX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (RAV4_ACA30 RM00000135201PX.html)

4.CHECK HARNESS AND CONNECTOR (SKID CONTROL SENSOR WIRE)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit

  1. Turn the ignition switch off.

  1. Make sure that there is no looseness in the locking part and connecting part of the connectors.

  1. Disconnect the skid control sensor wire.

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

    Standard Resistance:
    for RH:
    Tester Connection
    		Condition
    		Specified Condition
    W1 ("A"-2) - W1 ("B"-1)
    		Always
    		Below 1 Ω
    W1 ("A"-2) - W1 ("B"-2)
    		Always
    		10 kΩ or higher
    W1 ("A"-2) - Body ground
    		Always
    		10 kΩ or higher
    W1 ("A"-1) - W1 ("B"-2)
    		Always
    		Below 1 Ω
    W1 ("A"-1) - W1 ("B"-1)
    		Always
    		10 kΩ or higher
    W1 ("A"-1) - Body ground
    		Always
    		10 kΩ or higher
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    X1 ("A"-2) - X1 ("B"-1)
    		Always
    		Below 1 Ω
    X1 ("A"-2) - X1 ("B"-2)
    		Always
    		10 kΩ or higher
    X1 ("A"-2) - Body ground
    		Always
    		10 kΩ or higher
    X1 ("A"-1) - X1 ("B"-2)
    		Always
    		Below 1 Ω
    X1 ("A"-1) - X1 ("B"-1)
    		Always
    		10 kΩ or higher
    X1 ("A"-1) - Body ground
    		Always
    		10 kΩ or higher
    NOTICE:
    Check the speed sensor signal after replacement (RAV4_ACA30 RM0000022CZ007X.html).


NG
REPLACE SKID CONTROL SENSOR WIRE (RAV4_ACA30 RM000001YCG00CX.html)
OK


5.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit

  1. Turn the ignition switch off.

  1. for 2WD:
    Reconnect the skid control sensor wire.

  1. Make sure that there is no looseness in the locking part and connecting part of the connectors.

  1. Disconnect the skid control ECU connector and the rear speed sensor connector.

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

    Standard Resistance:
    for 2WD RH:
    Tester Connection
    		Condition
    		Specified Condition
    A67-17 (RR+) - W1-2
    		Always
    		Below 1 Ω
    A67-17 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    A67-16 (RR-) - W1-1
    		Always
    		Below 1 Ω
    A67-16 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    for 4WD RH:
    Tester Connection
    		Condition
    		Specified Condition
    A67-17 (RR+) - K29-1
    		Always
    		Below 1 Ω
    A67-17 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    A67-16 (RR-) - K29-2
    		Always
    		Below 1 Ω
    A67-16 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    for 2WD LH:
    Tester Connection
    		Condition
    		Specified Condition
    A67-5 (RL+) - X1-2
    		Always
    		Below 1 Ω
    A67-5 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    A67-4 (RL-) - X1-1
    		Always
    		Below 1 Ω
    A67-4 (RL-) - Body ground
    		Always
    		10 kΩ or higher
    for 4WD LH:
    Tester Connection
    		Condition
    		Specified Condition
    A67-5 (RL+) - K28-1
    		Always
    		Below 1 Ω
    A67-5 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    A67-4 (RL-) - K28-2
    		Always
    		Below 1 Ω
    A67-4 (RL-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.INSPECT SKID CONTROL ECU (SENSOR INPUT)


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Brake Control.Anti-Lock Brake System. Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit

  1. Reconnect the skid control ECU connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    for 2WD RH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    W1-2 - Body ground
    		Ignition switch ON
    		8 to 14 V
    for 4WD RH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    K29-1 - Body ground
    		Ignition switch ON
    		8 to 14 V
    for 2WD LH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    X1-2 - Body ground
    		Ignition switch ON
    		8 to 14 V
    for 4WD LH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    K28-1 - Body ground
    		Ignition switch ON
    		8 to 14 V
    Result:
    Result
    		Proceed to
    OK
    		for 2WD
    		A
    for 4WD
    		B
    NG
    		C
    NOTICE:
    Check the speed sensor signal after replacement (RAV4_ACA30 RM0000022CZ007X.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 (RAV4_ACA30 RM000000OS701UX.html).


B
REPLACE REAR SPEED SENSOR (RAV4_ACA30 RM000001XVL007X.html)

C
REPLACE BRAKE ACTUATOR ASSEMBLY (RAV4_ACA30 RM000001XV200PX.html)
A

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (RAV4_ACA30 RM00000227S005X.html)