Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit

Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)

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 the wheel speed and sends the appropriate signals to the skid control ECU. These signals are used for the ABS control system.
Speed sensor rotors have rows of alternating N and S magnetic poles. The hall IC type speed sensor uses the frequency of output pulses to detect the vehicle speed. Because the sensor outputs digital pulses, it can detect vehicle speeds even when the vehicle is nearly stationary.

Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit


DTC Code
DTC Detection Condition
Trouble Area
C1407
C1408
Any 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 more, the sensor power supply voltage decreases for 0.5 seconds or more.
  3. With the IG1 terminal voltage 9.5 V or more, an invalid state of the sensor power supply voltage occurs for 60 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 (Link).

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (COROLLA_ZRE142 RM000000XHR08KX.html).
1.CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

  1. Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to the DTC (COROLLA_ZRE142 RM000000XHS0CJX.html).

    ABS/VSC/TRAC
    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
    		-
    OK:
    There are no momentary interruptions.
    HINT:
    Perform the above inspection before removing the sensor and connector.


NG
Go to step 4
OK


2.READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)

  1. Turn the ignition switch off.

  1. Connect the Techstream to the DLC3.

  1. Start the engine.

  1. Select the Data List on the Techstream (COROLLA_ZRE142 RM000000XHW0BYX.html).

    ABS/VSC/TRAC
    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 km/h (202 mph)
    		Actual wheel speed
    		Similar speed as indicated on speedometer
    RL Wheel Speed
    		RL wheel speed sensor reading /min.: 0 km/h (0 mph), max.: 326 km/h (202 mph)
    		Actual wheel speed
    		Similar speed as indicated on speedometer

  1. Check that there is no difference between the speed value output from the speed sensor displayed on the Techstream 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 (COROLLA_ZRE142 RM0000014WB08AX.html).
    OK:
    The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).


NG
Go to step 4
OK


3.RECONFIRM DTC

  1. Turn the ignition switch off.

  1. Clear the DTCs (COROLLA_ZRE142 RM000000XHV0F2X.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 recorded (COROLLA_ZRE142 RM000000XHV0F2X.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 Problem Symptoms Table, refer back to the table and proceed to the next step (COROLLA_ZRE142 RM000000XHN0DUX.html).


B
REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM000003CZU00MX.html)
A

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (COROLLA_ZRE142 RM000000XHP0EKX.html)

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


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.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 at the locking part and the 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
    V1 ("A"-2) - V1 ("B"-1)
    		Always
    		Below 1 Ω
    V1 ("A"-2) - V1 ("B"-2)
    		Always
    		10 kΩ or higher
    V1 ("A"-2) - Body ground
    		Always
    		10 kΩ or higher
    V1 ("A"-1) - V1 ("B"-2)
    		Always
    		Below 1 Ω
    V1 ("A"-1) - V1 ("B"-1)
    		Always
    		10 kΩ or higher
    V1 ("A"-1) - Body ground
    		Always
    		10 kΩ or higher
    NOTICE:
    Check the speed sensor signal after replacement (COROLLA_ZRE142 RM000000XHT0ATX.html).


NG
REPLACE SKID CONTROL SENSOR WIRE
OK


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


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1407 Open Or Short In Rear Speed Sensor Rh Circuit

  1. Reconnect the skid control sensor wire.

  1. Make sure that there is no looseness at the locking part and the 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 RH:
    Tester Connection
    		Condition
    		Specified Condition
    A66-17 (RR+) - W1-2 (RR+)
    		Always
    		Below 1 Ω
    A66-17 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    A66-16 (RR-) - W1-1 (RR-)
    		Always
    		Below 1 Ω
    A66-16 (RR-) - Body ground
    		Always
    		10 kΩ or higher
    for LH:
    Tester Connection
    		Condition
    		Specified Condition
    A66-5 (RL+) - V1-2 (RL+)
    		Always
    		Below 1 Ω
    A66-5 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    A66-4 (RL-) - V1-1 (RL-)
    		Always
    		Below 1 Ω
    A66-4 (RL-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.INSPECT SKID CONTROL ECU (SENSOR INPUT)


    Corolla. Zre142 Aze141.Brake Control Dynamic Control Systems.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 RH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    W1-2 (RR+) - Body ground
    		Ignition switch ON
    		8 to 14 V
    for LH:
    Tester Connection
    		Switch Condition
    		Specified Condition
    V1-2 (RL+) - Body ground
    		Ignition switch ON
    		8 to 14 V
    NOTICE:
    Check the speed sensor signal after replacement (COROLLA_ZRE142 RM000000XHT0ATX.html).
    HINT:
    If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step (COROLLA_ZRE142 RM000000XHN0DUX.html).


NG
REPLACE BRAKE ACTUATOR ASSEMBLY (COROLLA_ZRE142 RM000003CZU00MX.html)
OK

REPLACE REAR SPEED SENSOR (COROLLA_ZRE142 RM000002VPC02SX.html)