C1403

BRAKE CONTROL: ANTI-LOCK BRAKE SYSTEM (for Hatchback): C1403: Rear Speed Sensor RH Malfunction

DTC C1403 - Rear Speed Sensor RH Malfunction

DTC C1404 - Rear Speed Sensor LH Malfunction

DESCRIPTION

The speed sensors detect the wheel speeds and send appropriate signals to the skid control ECU. Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change as the rotors turn.
The speed sensors detect those magnetic changes and send pulse signals to the skid control ECU. The ECU monitors the wheel speeds through these pulse signals to control the ABS control system.









HINT:
- DTCs C1273 and C1274 are output only in the Test Mode.
- DTCs C1273 and C1274 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends.
- DTCs C1403 and C1273 are for the rear speed sensor RH.
- DTCs C1404 and C1274 are for the rear speed sensor LH.

INSPECTION PROCEDURE
NOTE: Do not disassemble the rear speed sensor from the rear axle hub and bearing assembly.

PROCEDURE

1. CHECK REAR SPEED SENSOR INSTALLATION




(a) Turn the ignition switch off.
(b) Check the speed sensor installation.
OK:
There is no clearance between the sensor and rear axle carrier.
HINT: Because the rear axle hub and bearing assembly cannot be disassembled, if the rear speed sensor needs replacement, replace the rear axle hub and bearing assembly.

NG -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (REAR SPEED SENSOR)
OK -- Continue to next step.
2. INSPECT REAR SPEED SENSOR




(a) Disconnect the rear speed sensor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

for RH





for LH





NOTE: Check the speed sensor signal after replacement Test Mode Procedure.
HINT: Because the rear axle hub and bearing assembly cannot be disassembled, if the rear speed sensor needs replacement, replace the rear axle hub and bearing assembly.

NG -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (REAR SPEED SENSOR)
OK -- Continue to next step.
3. RECONFIRM DTC
(a) Clear the DTC ABS (Antilock Brake System) (for Hatchback).
(b) Start the engine.
(c) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.
(d) Check if the same DTC is recorded ABS (Antilock Brake System) (for Hatchback).

Result





HINT: If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

B -- REPLACE BRAKE ACTUATOR ASSEMBLY
A -- END