BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1407,C1408; Open or Short in Rear Speed Sensor RH Circuit; 2018 MY Camry HV [07/2017

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM1000000014VN1
Model Year Start: 2018	Model: Camry HV	Prod Date Range: [07/2017 - 09/2018]
Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1407,C1408; Open or Short in Rear Speed Sensor RH Circuit; 2018 MY Camry HV [07/2017 - 09/2018]

DTC

C1407

Open or Short in Rear Speed Sensor RH Circuit

DTC

C1408

Open or Short in Rear Speed Sensor LH Circuit

DESCRIPTION

Refer to DTCs C1415 and C1416.

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DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

Note

C1407

Open or Short in Rear Speed Sensor RH Circuit

523

526

528

INF Code: 523
- An open in the speed sensor signal circuit continues for 0.5 seconds or more.
INF Code: 526
- The speed sensor power source voltage is low for 0.5 seconds or more.
INF Code: 528
- The speed sensor power source voltage is low for 0.2 seconds, and does not return to normal for 60 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)
Wire harness or connector
Skid control ECU (brake booster with master cylinder assembly)

ABS DTC

C1408

Open or Short in Rear Speed Sensor LH Circuit

533

536

538

INF Code: 533
- An open in the speed sensor signal circuit continues for 0.5 seconds or more.
INF Code: 536
- The speed sensor power source voltage is low for 0.5 seconds or more.
INF Code: 538
- The speed sensor power source voltage is low for 0.2 seconds, and does not return to normal for 60 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)
Wire harness or connector
Skid control ECU (brake booster with master cylinder assembly)

ABS DTC

WIRING DIAGRAM

Refer to DTCs C1415 and C1416.

Click here

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
Disassembly of the rear speed sensor from the rear axle hub and bearing assembly is prohibited.

PROCEDURE

CHECK DTC

(a) Clear the DTCs.

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(d) Check if the same DTC is output.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTC C1407 is output.	A
DTC C1408 is output.	B

GO TO STEP 8

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.

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RR Speed Open

Rear speed sensor RH open detection

Error or Normal

Error: Momentary interruption

Normal: Normal

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RR Speed 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.

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.

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.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTC C1407 is not output.	A
DTC C1407 is output.	B

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

5.	INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the power switch off.

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

OK:

The connector is securely connected.

(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
u2-2 (RA+) - uR1-1 (RR+)	Always	Below 1 Ω
u2-2 (RA+) - uR1-2 (RR-)	Always	10 kΩ or higher
u2-2 (RA+) or uR1-1 (RR+) - Body ground	Always	10 kΩ or higher
u2-1 (RA-) - uR1-2 (RR-)	Always	Below 1 Ω
u2-1 (RA-) - uR1-1 (RR+)	Always	10 kΩ or higher
u2-1 (RA-) or uR1-2 (RR-) - Body ground	Always	10 kΩ or higher

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY

6.	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 A40 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
A40-7 (RR+) - uR1-1 (RR+)	Always	Below 1 Ω
A40-7 (RR+) or uR1-1 (RR+) - Body ground	Always	10 kΩ or higher
A40-8 (RR-) - uR1-2 (RR-)	Always	Below 1 Ω
A40-8 (RR-) or uR1-2 (RR-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

(a) Reconnect the A40 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
uR1-1 (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

8.	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.

Chassis > ABS/VSC/TRAC > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

RL Speed Open

Rear speed sensor LH open detection

Error or Normal

Error: Momentary interruption

Normal: Normal

Chassis > ABS/VSC/TRAC > Data List

Tester Display
RL Speed 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 11

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

(a) Select the Data List on the Techstream.

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 11

10.	RECONFIRM DTC

(a) Clear the DTCs.

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.

Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTC C1408 is not output.	A
DTC C1408 is output.	B

USE SIMULATION METHOD TO CHECK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

11.	INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the power switch off.

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

OK:

The connector is securely connected.

(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
v2-2 (LA+) - vR1-1 (RL+)	Always	Below 1 Ω
v2-2 (LA+) - vR1-2 (RL-)	Always	10 kΩ or higher
v2-2 (LA+) or vR1-1 (RL+) - Body ground	Always	10 kΩ or higher
v2-1 (LA-) - vR1-2 (RL-)	Always	Below 1 Ω
v2-1 (LA-) - vR1-1 (RL+)	Always	10 kΩ or higher
v2-1 (LA-) or vR1-2 (RL-) - Body ground	Always	10 kΩ or higher

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

12.	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 A40 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
A40-34 (RL+) - vR1-1 (RL+)	Always	Below 1 Ω
A40-34 (RL+) or vR1-1 (RL+) - Body ground	Always	10 kΩ or higher
A40-35 (RL-) - vR1-2 (RL-)	Always	Below 1 Ω
A40-35 (RL-) or vR1-2 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

(a) Reconnect the A40 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
vR1-1 (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