Toyota Corolla Cross: Left Rear Wheel Speed Sensor Circuit Short to Battery (C050C12)
DESCRIPTION
Each speed sensor detects wheel speed and sends signals to the skid control ECU (brake actuator assembly). These signals are used by the ABS control.
The speed sensor detects the magnetic fields of the speed sensor rotor as it rotates and outputs a pulse signal.
The frequency of the pulse varies in accordance with the rotational speed of the speed sensor rotor and the system uses this to determine the wheel speed.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C050C12 |
Left Rear Wheel Speed Sensor Circuit Short to Battery |
A short to +B in the speed sensor signal circuit is detected for 0.12 seconds or more. |
|
- *1: for AWD
- *2: for 2WD
WIRING DIAGRAM
for 2WD
for AWD
PROCEDURE
|
1. |
CHECK VEHICLE |
(a) Check the vehicle specification.
|
Result |
Proceed to |
|---|---|
|
for 2WD |
A |
|
for AWD |
B |
| B | .gif)
|
GO TO STEP 6 |
|
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|
2. |
CHECK HARNESS AND CONNECTOR (SENSOR GROUND 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 n3 rear speed sensor LH (rear axle hub and bearing assembly 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 |
|---|---|---|
|
n3-2 (RL+) - n3-1 (RL-) |
Ignition switch ON |
11 to 14 V |
| OK |
|
REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH |
|
|
3. |
CHECK HARNESS AND CONNECTOR (SENSOR GROUND 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+) - nO2-1 (RL-) |
Ignition switch ON |
11 to 14 V |
| OK |
|
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 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 |
|
|
5. |
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+) 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 |
|
6. |
CHECK HARNESS AND CONNECTOR (SENSOR GROUND 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+) - n4-2 (RL-) |
Ignition switch ON |
11 to 14 V |
| OK |
|
REPLACE REAR SPEED SENSOR LH |
| NG |
|
GO TO STEP 3 |
READ NEXT:
Left Rear Wheel Speed Sensor Circuit Short to Ground or Open (C050C14)
DESCRIPTION
Refer to DTC C050C12
Click here
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C050C14
Left Rear W
Left Rear Wheel Speed Sensor Circuit Voltage Out of Range (C050C1C)
DESCRIPTION
Refer to DTC C050C12
Click here
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C050C1C
Left Rear W
Left Rear Wheel Speed Sensor Circuit Intermittent (C050C1F)
DESCRIPTION
Refer to DTC C050C12
Click here
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C050C1F
Left Rear W
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Parts Location
PARTS LOCATION
ILLUSTRATION
*1
GENERATOR ASSEMBLY
*2
ECM
*3
BATTERY STATE SENSOR ASSEMBLY
*4
NO. 1 ENGINE ROOM RELAY BLOCK
ILLUSTRATION
*1
COMBINATION METER ASSEMBLY
