Toyota Camry (XV70): Left Front Wheel Speed Sensor Circuit Short to Battery (C050012)
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 |
|---|---|---|---|
|
C050012 | Left Front 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. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and system information memorization.
Click here
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- After replacing or removing and installing a speed sensor, perform Dealer Mode (Signal Check) inspection to confirm that the speed sensors are operating correctly.
Click here
PROCEDURE
|
1. | 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. |
|
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(b) Disconnect the A36 front 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 |
|---|---|---|
|
A36-1 (FL+) - A36-2 (FL-) |
Ignition switch ON | 11 to 14 V |
| OK | .gif) | REPLACE FRONT SPEED SENSOR LH |
|
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| 2. |
CHECK HARNESS AND CONNECTOR (FRONT SPEED SENSOR LH - 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. |
|
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(b) Disconnect the A33 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A36 front speed sensor LH 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 |
|---|---|---|
|
A36-2 (FL-) - Body ground |
Always | Below 1.5 V |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. |
CHECK HARNESS AND CONNECTOR (FRONT SPEED SENSOR LH - 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 A33 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A36 front speed sensor LH 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 |
|---|---|---|
|
A36-1 (FL+) or A33-19 (FL+) - A36-2 (FL-) or A33-8 (FL-) |
Always | 10 kΩ or higher |
| OK | | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Left Front Wheel Speed Sensor Circuit Short to Ground or Open (C050014)
DESCRIPTION Refer to DTC C050012 Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
C050014 Left Front Wheel Speed Sensor Circuit Short to Ground or Op
Left Front Wheel Speed Sensor Circuit Voltage Out of Range (C05001C)
DESCRIPTION Refer to DTC C050012 Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
C05001C Left Front Wheel Speed Sensor Circuit Voltage Out of Range
Left Front Wheel Speed Sensor Circuit Intermittent (C05001F)
DESCRIPTION Refer to DTC C050012 Click here
DTC No. Detection Item
DTC Detection Condition Trouble Area
C05001F Left Front Wheel Speed Sensor Circuit Intermittent
SEE MORE:
Engine (ignition) switch
(vehicles with a
smart key system)
Performing the following operations when carrying the electronic
key on your person starts the engine or changes engine
switch modes.
Starting the engine
1. Check that the parking brake is set.
2. Check that the shift lever is in P.
3. Firmly depress the brake pedal.
and a message will be di
Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE MANUAL VALVE
(a) Remove the manual valve from the transmission valve body assembly.
2. REMOVE SOLENOID LOCK PLATE
(a) Remove the 3 bolts and solenoid lock plate from the transmission valve body assembly.
3. REMOVE
