Toyota Corolla Cross: Left Rear Wheel Speed Sensor Internal Electronic Failure (C050C49)
DESCRIPTION
When the system is starting up and the skid control ECU (brake actuator assembly) detects a speed sensor circuit malfunction via the speed sensor circuit self-diagnosis function, this DTC is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
DTC Output from |
Note |
|---|---|---|---|---|---|---|
|
C050C49 |
Left Rear Wheel Speed Sensor Internal Electronic Failure |
A circuit malfunction in the speed sensor is detected during the self-test. |
|
Comes on |
Brake/EPB |
|
MONITOR DESCRIPTION
The skid control ECU (brake actuator assembly) has a speed sensor circuit self-diagnosis function.
When the self-diagnosis function that is performed during system startup detects a speed sensor circuit malfunction, the skid control ECU (brake actuator assembly) illuminates the MIL and stores this DTC.
MONITOR STRATEGY
|
Related DTCs |
C050C: Wheel speed sensor start up test for RL |
|
Required Sensors/Components(Main) |
Skid control ECU (brake actuator assembly) |
|
Required Sensors/Components(Related) |
Skid control ECU (brake actuator assembly) |
|
Frequency of Operation |
During initial checking |
|
Duration |
- |
|
MIL Operation |
Immediately |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
|
Monitor runs whenever the following DTCs are not stored |
TMC's intellectual property |
|
Other conditions belong to TMC's intellectual property |
- |
TYPICAL MALFUNCTION THRESHOLDS
|
TMC's intellectual property |
- |
COMPONENT OPERATING RANGE
|
TMC's intellectual property |
- |
CONFIRMATION DRIVING PATTERN
NOTICE:
When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.
HINT:
- After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off.
- Turn the ignition switch to ON (READY) and turn the GTS on.
- Wait for 1 second or more. [*]
HINT:
[*]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Chassis / Brake/EPB* / Utility / All Readiness.
*: Electric Parking Brake System
- Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.
WIRING DIAGRAM
Refer to DTC C050C12.
Click here .gif)
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (SENSOR CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
.png)
(b) Disconnect the n4 rear speed sensor LH connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the ignition switch to ON.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
n4-1 (RL+) - n4-2 (RL-) |
Ignition switch ON |
11 to 14 V |
| NG | .gif)
|
GO TO STEP 7 |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the n4 rear speed sensor LH connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the ignition switch to ON.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
n4-1 (RL+) - Body ground |
Ignition switch off |
Below 1.5 V |
| NG |
|
GO TO STEP 5 |
|
|
3. |
INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
.png)
(b) Disconnect the n4 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
n4-2 (RL-) or nO2-1 (RL-) - Body ground and other terminals |
Always |
10 kΩ or higher |
| NG |
|
REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
|
4. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-1 (RL-) or A151-23 (RL-) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE REAR SPEED SENSOR LH |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-2 (RL+) - Body ground |
Ignition switch off |
Below 1.5 V |
| OK |
|
REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
|
6. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-2 (RL+) - Body ground |
Always |
Below 1.5 V |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
CHECK HARNESS AND CONNECTOR (SENSOR CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
.png)
(b) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the ignition switch to ON.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-2 (RL+) - nO2-1 (RL-) |
Ignition switch ON |
11 to 14 V |
| OK |
|
REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY |
|
|
8. |
CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE CIRCUIT) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the ignition switch to ON.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-2 (RL+) - Body ground |
Ignition switch ON |
11 to 14 V |
| NG |
|
GO TO STEP 11 |
|
|
9. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
.png)
(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-1 (RL-) - Body ground |
Always |
Below 1.5 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-1 (RL-) - A151-23 (RL-) |
Always |
Below 1 Ω |
|
nO2-2 (RL+) or A151-39 (RL+) - nO2-1 (RL-) or A151-23 (RL-) |
Always |
10 kΩ or higher |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
11. |
CHECK HARNESS AND CONNECTOR (NO. 2 PARKING BRAKE WIRE ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the nO2 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
nO2-2 (RL+) - A151-39 (RL+) |
Always |
Below 1 Ω |
|
nO2-2 (RL+) or A151-39 (RL+) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Right Rear Wheel Speed Sensor Circuit Short to Battery (C051212)
DESCRIPTION
Each speed sensor detects wheel speed and sends signals to the
skid control ECU (brake actuator assembly). These signals are used by the brake
control.
The speed sensor detects the m
Right Rear Wheel Speed Sensor Circuit Short to Ground or Open (C051214)
DESCRIPTION
Refer to DTC C051212
Click here
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
MIL
DTC Output from
Right Rear Wheel Speed Sensor Circuit Voltage Out of Range (C05121C)
DESCRIPTION
Refer to DTC C051212
Click here
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
MIL
DTC Output from
SEE MORE:
Load Sensor for Occupant Detection System Circuit Voltage Below Threshold (B179316)
DESCRIPTION
DTC No. Detection Item
DTC Detection Condition Trouble Area
Warning Indicate Test Mode / Check Mode
B179316 Load Sensor for Occupant Detection System Circuit Voltage Below Threshold
When the detected voltage is below specified value before supplying
No Communication in Immobiliser System (B2796,B2798)
DESCRIPTION This DTC is stored when a door control transmitter assembly is inserted into the ignition key cylinder but no communication occurs between the door control transmitter assembly and transponder key ECU assembly.
DTC No. Detection Item
DTC Detection Condition Trouble Area
