Electronically Controlled Brake System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1235/35,C1236/36,C1238/38,C1239/39,C1275/75-C1278/78: Foreign Object is Attached on Tip of Front Speed Sensor RH

DESCRIPTION

Refer to DTCs C0200/31 and C0205/32 C0200.

DTCs C1275/75 to C1278/78 can be deleted when the speed sensor sends a vehicle speed signal or the Test Mode ends. DTCs C1275/75 to C1278/78 are output only in the Test Mode.

HINT
- DTC C1235/35 is for the right front speed sensor.
- DTC C1236/36 is for the left front speed sensor.
- DTC C1238/38 is for the right rear speed sensor.
- DTC C1239/39 is for the left rear speed sensor.
WIRING DIAGRAM

Refer to DTCs C0200/31 and C0205/32 C0200 or DTC C0210/33 and C0215/34 C0210.

INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Initialization.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU TO SPEED SENSOR)

(a) Disconnect the skid control ECU (A13, A15) connectors and each speed sensor connector.

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

Resistance:

RH
LH

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT SKID CONTROL ECU (SENSOR INPUT VOLTAGE)

(a) Reconnect the skid control ECU (A13, A15) connectors.

(b) Disconnect each speed sensor connector.

(c) Turn the engine switch on (IG).

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

Voltage:

NG -- REPLACE SKID CONTROL ECU
OK -- Continue to next step.

3. RECONFIRM DTC

(a) Clear the DTC Electronically Controlled Brake System.

(b) Start the engine.

(c) Drive the vehicle at the speed of 20 km/h (12 mph) or more for 60 seconds or more.

(d) Check if the same DTCs are recorded Electronically Controlled Brake System.

HINT
Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.

Result:

B -- END
A -- Continue to next step.

4. INSPECT SPEED SENSOR TIP

(a) Remove each speed sensor Removal for front, or Removal for rear).

(b) Check the sensor tip.

OK:

No scratches or foreign matter on the sensor tip.

NOTICE:
Check the speed sensor signal after replacement Electronically Controlled Brake System.

NG -- CLEAN OR REPLACE SPEED SENSOR
OK -- Continue to next step.

5. INSPECT SPEED SENSOR ROTOR

(a) Remove the speed sensor rotor.

(b) Check the sensor rotor.

OK:

No scratches, oil, or foreign matter on the rotors.

NOTICE:
Check the speed sensor signal after cleaning/replacement Electronically Controlled Brake System.

NG -- CLEAN OR REPLACE SPEED SENSOR ROTOR
OK -- Continue to next step.

6. RECONFIRM DTC

(a) Clear the DTCs Electronically Controlled Brake System.

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

(c) Check if the same DTCs are recorded Electronically Controlled Brake System.

Result:

B -- REPLACE SKID CONTROL ECU

A -- END