Lexus ES: Rear Speed Sensor RH Circuit Output (C1415,C1416)

Lexus ES (XZ10) Service Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System (for Hv Model) / Rear Speed Sensor RH Circuit Output (C1415,C1416)

DESCRIPTION

Each speed sensor detects the wheel speed and sends the signals to the skid control ECU (brake booster with master cylinder assembly). These signals are used for ABS control.

HINT:

The output voltage values shown below are for when the vehicle wire harnesses are connected to the skid control ECU (brake booster with master cylinder assembly) and the speed sensors.

DTC No.	Detection Item	INF Code	DTC Detection Condition	Trouble Area	MIL	Note
C1415	Rear Speed Sensor RH Circuit Output	524 543	INF Code: 524 An open in the sensor signal of a malfunctioning wheel occurs 255 times or more. INF Code: 543 Either of the following is detected: At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.	Skid control sensor wire RH (No. 1 parking brake wire assembly) Rear speed sensor RH (rear axle hub and bearing assembly RH) Speed sensor installed improperly Wire harness or connector Rear speed sensor rotor RH (rear axle hub and bearing assembly RH) Skid control ECU (brake booster with master cylinder assembly)	Comes on	INF Code 524: SAE Code C0516 (Case 2) INF Code 543: SAE Code C0516 (Case 1) ABS DTC
C1416	Rear Speed Sensor LH Circuit Output	534 544	INF Code: 534 An open in the sensor signal of a malfunctioning wheel occurs 255 times or more. INF Code: 544 Either of the following is detected: At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.	Skid control sensor wire LH (No. 2 parking brake wire assembly) Rear speed sensor LH (rear axle hub and bearing assembly LH) Speed sensor installed improperly Wire harness or connector Rear speed sensor rotor LH (rear axle hub and bearing assembly LH) Skid control ECU (brake booster with master cylinder assembly)	Comes on	INF Code 534: SAE Code C0510 (Case 2) INF Code 544: SAE Code C0510 (Case 1) ABS DTC

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Note

C1415

Rear Speed Sensor RH Circuit Output

524

543

INF Code: 524
- An open in the sensor signal of a malfunctioning wheel occurs 255 times or more.
INF Code: 543
- Either of the following is detected:
  1. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.
  2. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.

Skid control sensor wire RH (No. 1 parking brake wire assembly)
Rear speed sensor RH (rear axle hub and bearing assembly RH)
Speed sensor installed improperly
Wire harness or connector
Rear speed sensor rotor RH (rear axle hub and bearing assembly RH)
Skid control ECU (brake booster with master cylinder assembly)

Comes on

INF Code 524: SAE Code C0516 (Case 2)
INF Code 543: SAE Code C0516 (Case 1)
ABS DTC

C1416

Rear Speed Sensor LH Circuit Output

534

544

INF Code: 534
- An open in the sensor signal of a malfunctioning wheel occurs 255 times or more.
INF Code: 544
- Either of the following is detected:
  1. At a vehicle speed of 20 km/h (12 mph) or more, noise occurs in the sensor signals of a malfunctioning wheel 75 times or more within 5 seconds.
  2. At a vehicle speed of 10 km/h (6 mph) or more, noise occurs once per rotor rotation for 15 seconds or more.

Skid control sensor wire LH (No. 2 parking brake wire assembly)
Rear speed sensor LH (rear axle hub and bearing assembly LH)
Speed sensor installed improperly
Wire harness or connector
Rear speed sensor rotor LH (rear axle hub and bearing assembly LH)
Skid control ECU (brake booster with master cylinder assembly)

Comes on

INF Code 534: SAE Code C0510 (Case 2)
INF Code 544: SAE Code C0510 (Case 1)
ABS DTC

MONITOR DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) monitors the output value of the speed sensors. When the vehicle is being driven and a sudden irregular change in acceleration due to iron particles being attached to the speed sensor is detected repeatedly, or periodic sudden changes in acceleration due to iron particles being attached to the speed sensor rotor is detected, the skid control ECU (brake booster with master cylinder assembly) judges that speed sensor noise is occurring and illuminates the MIL and stores a DTC.

Also, when the vehicle is being driven and the output value of the speed sensor is momentarily interrupted repeatedly, the skid control ECU (brake booster with master cylinder assembly) judges that there is a momentary interruption in the speed sensor circuit and illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs	C0510 (Case 1): Speed sensor intermittent/erratic C0510 (Case 2): Speed sensor intermittent/erratic C0516 (Case 1): Speed sensor intermittent/erratic C0516 (Case 2): Speed sensor intermittent/erratic
Required Sensors/Components(Main)	Speed sensor Speed sensor rotor
Required Sensors/Components(Related)	Speed sensor
Frequency of Operation	Continuous
Duration	-: C0510 (Case 1) and C0516 (Case 1) 255 times: C0510 (Case 2) and C0516 (Case 2)
MIL Operation	Immediately
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

C0501, C0507, C050D, C0513 (Speed sensor range/performance)

C0502, C0508, C050E, C0514 (Speed sensor circuit low)

C0503, C0509, C050F, C0515 (Speed sensor circuit high)

C140B, C140C, C140D, C140E (2 wheel speed sensors malfunction)

C14E1, C14E4, C14E7, C14EA (Case 1) (Speed sensor voltage circuit low)

C14E1, C14E4, C14E7, C14EA (Case 2) (Speed sensor voltage circuit low)

C0510 and C0516 (Case 1)

Speed sensor fail (C0501, C0502, C0503, C0507, C0508, C0509, C050D, C050E, C050F, C0513, C0514, C0515, C140B, C140C, C140D, C140E, C14E1, C14E4, C14E7, C14EA)

Not detected

C0510 and C0516 (Case 2)

All of the following conditions are met	-
Brake system voltage 1 (VM1)	Less than 16.44 V
Speed sensor pulse	No signal
Wheels are not locked	Met
Vehicle speed	15 km/h (9 mph) or more
Speed sensor fail (C0501, C0502, C0503, C0507, C0508, C0509, C050D, C050E, C050F, C0513, C0514, C0515, C140B, C140C, C140D, C140E, C14E1, C14E4, C14E7, C14EA)	Not detected

TYPICAL MALFUNCTION THRESHOLDS

C0510 and C0516 (Case 1)

Either of the following conditions is met	-
Speed sensor noise	Exist
Speed sensor a piece of metal rotor noise	Exist

C0510 and C0516 (Case 2)

Edge of speed sensor outage

Exist

COMPONENT OPERATING RANGE

C0510 and C0516 (Case 1)

Both of the following conditions are met	-
Speed sensor fail (C0501, C0502, C0503, C0507, C0508, C0509, C050D, C050E, C050F, C0513, C0514, C0515, C140B, C140C, C140D, C140E, C14E1, C14E4, C14E7, C14EA)	Not detected
Speed sensor pass flag	On

C0510 and C0516 (Case 2)

All of the following conditions are met	-
Brake system voltage 1 (VM1)	Less than 16.44 V
Speed sensor pulse	No signal
Wheels are not locked	Met
Vehicle speed	15 km/h (9 mph) or more
Speed sensor fail (C0501, C0502, C0503, C0507, C0508, C0509, C050D, C050E, C050F, C0513, C0514, C0515, C140B, C140C, C140D, C140E, C14E1, C14E4, C14E7, C14EA)	Not detected
Speed sensor pass flag	On

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off.
Turn the power switch on (READY).
Turn the Techstream on.
Drive the vehicle at a speed of 15 km/h (9 mph) or more for 15 seconds or more.
Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
Read the DTCs.
HINT:
- If a DTC is output, the system is malfunctioning.
- If a DTC is not output, perform the following procedure.
If the DTCs are not output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTCs are output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

PROCEDURE

CHECK DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(d) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTC C1415 is output.	A
DTC C1416 is output.	B

GO TO STEP 9

2.	READ VALUE USING TECHSTREAM (MOMENTARY INTERRUPTION)

(a) Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC.

Click here

Chassis > ABS/VSC/TRAC > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RR Speed Sensor Voltage Open	Rear speed sensor RH voltage open detection	Error or Normal	Error: Momentary interruption Normal: Normal	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RR Speed Sensor Voltage Open

Rear speed sensor RH voltage open detection

Error or Normal

Error: Momentary interruption

Normal: Normal

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RR Speed Sensor Voltage Open

(b) Check for any momentary interruptions in the wire harness and connectors.

OK:

There are no momentary interruptions.

NOTICE:

Perform the above inspection before removing the sensor and connector.

GO TO STEP 5

3.	READ VALUE USING TECHSTREAM (REAR SPEED SENSOR RH)

(a) Select the Data List on the Techstream.

Click here

Chassis > ABS/VSC/TRAC > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RR Wheel Speed	Rear speed sensor RH	Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RR Wheel Speed

(b) Check the rear speed sensor RH output value.

OK:

The output value changes in accordance with the vehicle speed.

GO TO STEP 5

4.	RECONFIRM DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(d) Perform a road test.

(e) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTC C1415 is not output.	A
DTC C1415 is output.	B

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

5.	CHECK REAR SPEED SENSOR RH INSTALLATION

(a) Turn the power switch off.

*1	Rear Speed Sensor RH
*a	OK
*b	NG
*c	No Clearance

(b) Check the rear speed sensor RH installation.

OK:

There is no clearance between the sensor and the rear axle hub.

HINT:

Because the rear axle hub and bearing assembly RH cannot be disassembled, if the rear speed sensor RH needs replacement, replace the rear axle hub and bearing assembly RH.

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH

6.	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.

Front view of skid control sensor wire RH (No. 1 parking brake wire assembly)

Front view of wire harness connector

(to Sensor Side Connector)

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the b2 and bN1 skid control sensor wire RH (No. 1 parking brake wire assembly) connectors.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
b2-2 (RA+) - bN1-1 (RR+)	Always	Below 1 Ω
b2-2 (RA+) or bN1-1 (RR+) - Body ground and other terminals	Always	10 kΩ or higher
b2-1 (RA-) - bN1-2 (RR-)	Always	Below 1 Ω
b2-1 (RA-) or bN1-2 (RR-) - Body ground and other terminals	Always	10 kΩ or higher

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

7.	CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - NO. 1 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A45-7 (RR+) - bN1-1 (RR+)	Always	Below 1 Ω
A45-7 (RR+) or bN1-1 (RR+) - Body ground	Always	10 kΩ or higher
A45-8 (RR-) - bN1-2 (RR-)	Always	Below 1 Ω
A45-8 (RR-) or bN1-2 (RR-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.	INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT)

(a) Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.

*a	Front view of wire harness connector (to Skid Control Sensor Wire RH (No. 1 Parking Brake Wire Assembly))

(b) Turn the power switch on (IG).

Standard Voltage:

Tester Connection	Condition	Specified Condition
bN1-1 (RR+) - Body ground	Power switch on (IG)	8 to 14 V

NOTICE:

Check the rear speed sensor RH signal after replacement.

Click here

HINT:

The rear speed sensor RH and rear speed sensor rotor RH are incorporated into the rear axle hub and bearing assembly RH.

If the rear speed sensor RH and rear speed sensor rotor RH need to be replaced, replace the rear axle hub and bearing assembly RH.

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY RH

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

9.	READ VALUE USING TECHSTREAM (MOMENTARY INTERRUPTION)

(a) Using the Techstream, check for any momentary interruptions in the wire harness and connector corresponding to a DTC.

Click here

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RL Speed Sensor Voltage Open

Rear speed sensor LH voltage open detection

Error or Normal

Error: Momentary interruption

Normal: Normal

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RL Speed Sensor Voltage Open

(b) Check for any momentary interruptions in the wire harness and connectors.

OK:

There are no momentary interruptions.

NOTICE:

Perform the above inspection before removing the sensor and connector.

GO TO STEP 12

10.	READ VALUE USING TECHSTREAM (REAR SPEED SENSOR LH)

(a) Select the Data List on the Techstream.

Click here

Chassis > ABS/VSC/TRAC > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
RL Wheel Speed	Rear speed sensor LH	Min.: 0 km/h (0 mph), Max.: 326.4 km/h (203 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RL Wheel Speed

(b) Check the rear speed sensor LH output value.

OK:

The output value changes in accordance with the vehicle speed.

GO TO STEP 12

11.	RECONFIRM DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(d) Perform a road test.

(e) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTC C1416 is not output.	A
DTC C1416 is output.	B

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

12.	CHECK REAR SPEED SENSOR LH INSTALLATION

(a) Turn the power switch off.

*1	Rear Speed Sensor LH
*a	OK
*b	NG
*c	No Clearance

(b) Check the rear speed sensor LH installation.

OK:

There is no clearance between the sensor and the rear axle hub.

HINT:

Because the rear axle hub and bearing assembly LH cannot be disassembled, if the rear speed sensor LH needs replacement, replace the rear axle hub and bearing assembly LH.

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

13.	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.

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

Front view of wire harness connector

(to Sensor Side Connector)

Front view of wire harness connector

(to Vehicle Side Connector)

(b) Disconnect the b4 and bN2 skid control sensor wire LH (No. 2 parking brake wire assembly) connectors.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
b4-2 (LA+) - bN2-1 (RL+)	Always	Below 1 Ω
b4-2 (LA+) or bN2-1 (RL+) - Body ground and other terminals	Always	10 kΩ or higher
b4-1 (LA-) - bN2-2 (RL-)	Always	Below 1 Ω
b4-1 (LA-) or bN2-2 (RL-) - Body ground and other terminals	Always	10 kΩ or higher

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

14.	CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - NO. 2 PARKING BRAKE WIRE ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A45-34 (RL+) - bN2-1 (RL+)	Always	Below 1 Ω
A45-34 (RL+) or bN2-1 (RL+) - Body ground	Always	10 kΩ or higher
A45-35 (RL-) - bN2-2 (RL-)	Always	Below 1 Ω
A45-35 (RL-) or bN2-2 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.	INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SENSOR OUTPUT)

(a) Reconnect the A45 skid control ECU (brake booster with master cylinder assembly) connector.

*a	Front view of wire harness connector (to Skid Control Sensor Wire LH (No. 2 Parking Brake Wire Assembly))

(b) Turn the power switch on (IG).

Standard Voltage:

Tester Connection	Condition	Specified Condition
bN2-1 (RL+) - Body ground	Power switch on (IG)	8 to 14 V

NOTICE:

Check the rear speed sensor LH signal after replacement.

Click here

HINT:

The rear speed sensor LH and rear speed sensor rotor LH are incorporated into the rear axle hub and bearing assembly LH.

If the rear speed sensor LH and rear speed sensor rotor LH need to be replaced, replace the rear axle hub and bearing assembly LH.

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY LH

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

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