Toyota Yaris: Vehicle Stability Control System / Left Rear Wheel Speed Sensor Circuit Short to Battery (C050C12)
DESCRIPTION
Refer to DTC C050C1F.
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
|---|---|---|---|---|
| C050C12 | Left Rear Wheel Speed Sensor Circuit Short to Battery | The speed sensor short signal is ON continuously for 0.5 seconds or more. |
| Brake |
WIRING DIAGRAM
Refer to DTC C050C1F.
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CAUTION / NOTICE / HINT
NOTICE:
-
After replacing the skid control ECU (brake actuator assembly), perform "Calibration".
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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.
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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. |
|
(b) Disconnect the O117 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 |
|---|---|---|
| O117-2 (RL+) - O117-1 (RL-) | Ignition switch ON | 11 to 14 V |
| OK |
 | REPLACE REAR SPEED SENSOR LH |
|
| 2. | CHECK HARNESS AND CONNECTOR (SENSOR GROUND CIRCUIT) |
(a) Turn the ignition switch off.
| (b) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(c) Disconnect the A108 skid control ECU (brake actuator 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 |
|---|---|---|
| O117-1 (RL-) - Body ground | Always | Below 1.5 V |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | CHECK HARNESS AND CONNECTOR (REAR SPEED SENSOR LH - BRAKE ACTUATOR ASSEMBLY) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| O117-2 (RL+) or A108-29 (RL+) - O117-1 (RL-) or A108-28 (RL-) | Always | 10 kΩ or higher |
| OK |
 | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Right Front Wheel Speed Sensor Signal Stuck Low (C050623)
DESCRIPTION Refer to DTC C05061F. Click here
DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from C050623 Right Front Wheel Speed Sensor Signal Stuck Low Any of the following is detected:
When the +BS terminal voltage is 17...
Left Rear Wheel Speed Sensor Circuit Short to Ground or Open (C050C14)
DESCRIPTION Refer to DTC C050C1F. Click here
DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from C050C14 Left Rear Wheel Speed Sensor Circuit Short to Ground or Open An open in the speed sensor signal circuit continues for 0...
Other information:
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Key Suspend Function
If a key is left in the vehicle, the functions of the key left in the vehicle are temporarily suspended to prevent theft of the vehicle.
To restore the functions, press the unlock button on the functions-suspended key in the vehicle.
