Dtc C1405 Open Or Short In Front Speed Sensor Rh Circuit
Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
READ VALUE USING INTELLIGENT TESTER (FR/FL WHEEL SPEED)
RECONFIRM DTC
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)
INSPECT SKID CONTROL ECU (SENSOR INPUT)
DTC C1405 Open or Short in Front Speed Sensor RH Circuit |
DTC C1406 Open or Short in Front 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.DTC Code
| DTC Detection Condition
| Trouble Area
|
C1405
C1406
| Either of the following is detected:
- An open in the speed sensor signal circuit continues for 0.5 seconds or more.
- With the IG1 terminal voltage 9.5 V or higher, the sensor power supply voltage decreases for 0.5 seconds or more.
| - Front speed sensor RH/LH
- Speed sensor circuit
- Brake actuator assembly (Skid control ECU)
|
- HINT:
- DTC C1405 is for the front speed sensor RH.
- DTC C1406 is for the front speed sensor LH.
WIRING DIAGRAM
Refer to DTCs C1401 and C1402 (RAV4_ACA30 RM000000XI905EX_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) |
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
|
FR Speed Open
| FR speed sensor open detection / ERROR or NORMAL
| ERROR: Momentary interruption
NORMAL: Normal
| -
|
FL Speed Open
| FL 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.
| 2.READ VALUE USING INTELLIGENT TESTER (FR/FL WHEEL SPEED) |
Turn the ignition switch off.
Connect the intelligent tester to the DLC3.
Start the engine.
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
|
FR Wheel Speed
| FR 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.
|
FL Wheel Speed
| FL 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.
|
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).
Turn the ignition switch off.
Clear the DTCs (RAV4_ACA30 RM000000ONJ027X.html).
Start the engine.
Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
Check if the same DTC is output (RAV4_ACA30 RM000000ONJ027X.html).
- Result:
Result
| Proceed to
|
DTCs (C1405 and C1406) are not output.
| A
|
DTCs (C1405 and/or C1406) 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).
| 4.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR) |
Turn the ignition switch off.
Make sure that there is no looseness in the locking part and connecting part of the connectors.
Disconnect the skid control ECU connector and the front speed sensor connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
- for RH:
Tester Connection
| Condition
| Specified Condition
|
A67-7 (FR+) - A62-1
| Always
| Below 1 Ω
|
A67-7 (FR+) - Body ground
| Always
| 10 kΩ or higher
|
A67-6 (FR-) - A62-2
| Always
| Below 1 Ω
|
A67-6 (FR-) - Body ground
| Always
| 10 kΩ or higher
|
- for LH:
Tester Connection
| Condition
| Specified Condition
|
A67-19 (FL+) - A61-1
| Always
| Below 1 Ω
|
A67-19 (FL+) - Body ground
| Always
| 10 kΩ or higher
|
A67-18 (FL-) - A61-2
| Always
| Below 1 Ω
|
A67-18 (FL-) - Body ground
| Always
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 5.INSPECT SKID CONTROL ECU (SENSOR INPUT) |
Reconnect the skid control ECU connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
- for RH:
Tester Connection
| Switch Condition
| Specified Condition
|
A62-1 - Body ground
| Ignition switch ON
| 8 to 14 V
|
- for LH:
Tester Connection
| Switch Condition
| Specified Condition
|
A61-1 - Body ground
| Ignition switch ON
| 8 to 14 V
|
- 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).
