Lexus ES: Right Rear Wheel Speed Sensor Circuit Short to Ground or Open (C051214)
DESCRIPTION
Refer to DTC C051212
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| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C051214 | Right Rear Wheel Speed Sensor Circuit Short to Ground or Open | A short or open circuit is detected in the speed sensor signal circuit for 0.12 seconds or more. |
|
*1: for 2WD
*2: for AWD
DTC Detection Conditions: C051214| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | - | - | - |
| Malfunction Status | An open circuit is detected in the speed sensor signal circuit. | ○ | - |
| A short circuit is detected in the speed sensor signal circuit. | - | ○ | |
| Detection Time | 0.12 seconds or more. | 0.12 seconds or more. | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
WIRING DIAGRAM
Refer to DTC C051212.
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CAUTION / NOTICE / HINT
NOTICE:
-
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
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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 VEHICLE |
(a) Check the vehicle specification.
| Result | Proceed to |
|---|---|
| for 2WD (w/o AVS) | A |
| for 2WD (w/ AVS) | B |
| for AWD | C |
| B |  | GO TO STEP 7 |
| C | | GO TO STEP 12 |
|
| 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 b2 rear speed sensor RH (rear axle hub and bearing assembly RH) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the engine switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| b2-2 (RA+) - b2-1 (RA-) | Engine switch on (IG) | 11 to 14 V |
| NG | | GO TO STEP 5 |
|
| 3. | INSPECT NO. 1 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. |
|
(b) Disconnect the b2 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.
(c) Disconnect the bN1 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| b2-1 (RA-) or bN1-2 (RR-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY |
|
| 4. | CHECK HARNESS AND CONNECTOR (NO. 1 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the bN1 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| bN1-2 (RR-) or A40-37 (RR-) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 5. | INSPECT NO. 1 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. |
|
(b) Disconnect the b2 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.
(c) Disconnect the bN1 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| b2-1 (RA-) - bN1-2 (RR-) | Always | Below 1 Ω |
| NG | | REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY |
|
| 6. | CHECK HARNESS AND CONNECTOR (NO. 1 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the bN1 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| bN1-2 (RR-) - A40-37 (RR-) | Always | Below 1 Ω |
| OK | | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 7. | 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 b2 rear speed sensor RH (rear axle hub and bearing assembly RH) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the engine switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| b2-2 (RA+) - b2-1 (RA-) | Engine switch on (IG) | 11 to 14 V |
| NG | | GO TO STEP 10 |
|
| 8. | INSPECT NO. 1 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. |
|
(b) Disconnect the b2 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.
(c) Disconnect the bN5 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| b2-1 (RA-) or bN5-2 (RR-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY |
|
| 9. | CHECK HARNESS AND CONNECTOR (NO. 1 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the bN5 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| bN5-2 (RR-) or A40-37 (RR-) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 10. | INSPECT NO. 1 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. |
|
(b) Disconnect the b2 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.
(c) Disconnect the bN5 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| b2-1 (RA-) - bN5-2 (RR-) | Always | Below 1 Ω |
| NG | | REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY |
|
| 11. | CHECK HARNESS AND CONNECTOR (NO. 1 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the bN5 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| bN5-2 (RR-) - A40-37 (RR-) | Always | Below 1 Ω |
| OK | | REPLACE BRAKE ACTUATOR ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 12. | 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 b2 rear speed sensor RH connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Turn the engine switch on (IG).
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| b2-2 (RA+) - b2-1 (RA-) | Engine switch on (IG) | 11 to 14 V |
| NG | | GO TO STEP 5 |
|
| 13. | INSPECT NO. 1 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. |
|
(b) Disconnect the b2 skid control sensor wire RH (No. 1 parking brake wire assembly) connector.
(c) Disconnect the bN1 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| b2-1 (RA-) or bN1-2 (RR-) - Body ground and other terminals | Always | 10 kΩ or higher |
| NG | | REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY |
|
| 14. | CHECK HARNESS AND CONNECTOR (NO. 1 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 A40 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the bN1 skid control sensor wire RH (No. 1 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 |
|---|---|---|
| bN1-2 (RR-) or A40-37 (RR-) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE REAR SPEED SENSOR RH |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Vehicle Behavior Chart
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