C1273

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C0210/33,C0215/34,C1273/73,C1274/74: Rear Speed Sensor RH Circuit

DESCRIPTION

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

DTCs C1273/73 and C1274/74 are cleared when the speed sensor sends a vehicle speed signal or test mode ends. DTCs C1273/73 and C1274/74 are output only in test mode.

HINT
- DTC C0210/33 is for the rear speed sensor RH.
- DTC C0215/34 is for the rear speed sensor LH.

WIRING DIAGRAM

INSPECTION PROCEDURE

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

HINT
Start the inspection from "CHECK HARNESS AND CONNECTOR" when using the Techstream and start from "PERFORM TEST MODE" when not using the Techstream.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

(a) Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to a DTC Check For Intermittent Problems.

ABS/VSC/TRAC

OK:

There are no momentary interruptions.

HINT
Perform the above inspection before removing the sensor and connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (SPEED SENSOR CIRCUIT)
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)

(a) Connect the Techstream to the DLC3.

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

(c) Select the Data List mode on the Techstream.

ABS/VSC/TRAC

(d) Check that the speed value output from the speed sensor displayed on the Techstream and the speed value displayed on the speedometer are almost the same when driving the vehicle.

OK:

The speed value output from the speed sensor displayed on the Techstream is the same as the actual vehicle speed.

ABS/VSC/TRAC

(e) Check that the sensor signal conforms to the wheel direction.

OK:

The wheel direction is displayed.

NG -- INSPECT REAR SPEED SENSOR INSTALLATION
OK -- Continue to next step.

3. PERFORM TEST MODE (SIGNAL CHECK)

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Perform sensor signal check in "TEST MODE PROCEDURE" Test Mode Procedure.

OK:

All Test Mode DTCs are erased.

NG -- INSPECT REAR SPEED SENSOR INSTALLATION
OK -- Continue to next step.

4. RECONFIRM DTC

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Start the engine.

(c) Drive the vehicle at the speed of 32 km/h (20 mph) or more for 60 seconds or more.

(d) Check if the same DTCs are recorded Reading and Clearing Diagnostic Trouble Codes.

Result

OK:

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

The installation bolt is tightened properly.

Torque: 8.5 N*m (87 kgf*cm, 75 in.*lbf)

NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure.

NG -- SECURELY REINSTALL REAR SPEED SENSOR Removal
OK -- Continue to next step.

6. INSPECT REAR SPEED SENSOR TIP

(a) Remove the rear speed sensor.

(b) Check the sensor tip.

OK:

No scratches or foreign matter on the sensor tip.

NOTICE:
Check the speed sensor signal after cleaning/replacement Test Mode Procedure.

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

7. CHECK REAR SPEED SENSOR WIRE

(a) Disconnect the rear speed sensor wire.

(b) Disconnect the rear speed sensor wire.

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

Standard resistance:

for RH
for LH

NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure.

NG -- REPLACE REAR SPEED SENSOR WIRE
OK -- Continue to next step.

8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR SPEED SENSOR)

(a) Disconnect the A19 and A21 ECU connectors.

(b) Disconnect the R56 sensor connector.

(c) Disconnect the S69 sensor connector.

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

Standard resistance:

for RH
for LH

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

9. CHECK SKID CONTROL ECU (SENSOR INPUT VOLTAGE)

(a) Reconnect the A19 and A21 ECU connectors.

(b) Disconnect the R56 sensor connector.

(c) Disconnect the S69 sensor connector.

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

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

Standard voltage:

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

10. RECONFIRM DTC

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Start the engine.

(c) Drive the vehicle at the speed of 32 km/h (20 mph) or more for 60 seconds or more.

(d) Check if the same DTCs are recorded Reading and Clearing Diagnostic Trouble Codes.

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

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 -- END
A -- Continue to next step.

11. REPLACE REAR SPEED SENSOR

(a) Replace the rear speed sensor Removal.

NOTICE:
Check the speed sensor signal after replacement Test Mode Procedure.

NEXT -- Continue to next step.

12. RECONFIRM DTC

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Start the engine.

(c) Drive the vehicle at the speed of 32 km/h (20 mph) or more for 60 seconds or more.

(d) Check if the same DTCs are recorded Reading and Clearing Diagnostic Trouble Codes.

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

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 -- END
A -- Continue to next step.

13. 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 Test Mode Procedure.

NG -- CLEAN OR REPLACE SPEED SENSOR ROTOR

OK -- REPLACE SKID CONTROL ECU Removal