Lexus ES manuals

Lexus ES: 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 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.

  • Rear speed sensor LH (rear axle hub and bearing assembly LH)
  • Wire harness or connector
  • Skid control sensor wire LH (No. 2 parking brake wire assembly)
  • Skid control ECU (brake actuator assembly)
DTC Detection Conditions: C050C14
 

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 C050C12.

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.

    Click here

  • 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.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

(to Rear Speed Sensor LH (Rear Axle Hub and Bearing Assembly LH))

(b) Disconnect the b4 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 engine switch on (IG).

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

b4-2 (LA+) - b4-1 (LA-)

Engine switch on (IG)

11 to 14 V

Result

Proceed to

OK (w/o AVS)

A

OK (w/ AVS)

B

NG (w/o AVS)

C

NG (w/ AVS)

D

B

GO TO STEP 4

C

GO TO STEP 6

D

GO TO STEP 8

A

2.

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.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the b4 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

(c) Disconnect the bN2 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

b4-1 (LA-) or bN2-2 (RL-) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

3.

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 A40 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the bN2 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

bN2-2 (RL-) or A40-23 (RL-) - Body ground

Always

10 kΩ or higher

OK

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

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.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the b4 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

(c) Disconnect the bN6 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

b4-1 (LA-) or bN6-2 (RL-) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

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 A40 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the bN6 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

bN6-2 (RL-) or A40-23 (RL-) - Body ground

Always

10 kΩ or higher

OK

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.

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.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the b4 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

(c) Disconnect the bN2 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

b4-1 (LA-) - bN2-2 (RL-)

Always

Below 1 Ω

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

7.

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 A40 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the bN2 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

bN2-2 (RL-) - A40-23 (RL-)

Always

Below 1 Ω

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

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.

*a

Front view of skid control sensor wire LH (No. 2 parking brake wire assembly)

*b

Front view of wire harness connector

(to Sensor Side Connector)

*c

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the b4 skid control sensor wire LH (No. 2 parking brake wire assembly) connector.

(c) Disconnect the bN6 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

b4-1 (LA-) - bN6-2 (RL-)

Always

Below 1 Ω

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

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.

(b) Disconnect the A40 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the bN6 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

bN6-2 (RL-) - A40-23 (RL-)

Always

Below 1 Ω

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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