Toyota Tacoma 2015-2018 Service Manual: Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) (C1277,...,C1416)

Toyota Tacoma 2015-2018 Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) (C1277,...,C1416)

DESCRIPTION

Refer to DTCs C1401 and C1402 (See page ).

DTC Code	DTC Detection Condition	Trouble Area
C1277 C1278	Stored only during test mode.	Rear speed sensor RH/LH Rear speed sensor rotor RH/LH (Rear axle hub and bearing assembly RH/LH)
C1415 C1416	One of the following conditions is met: An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more. 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.	Rear speed sensor RH/LH Skid control sensor wire Speed sensor circuit Rear speed sensor rotor RH/LH (Rear axle hub and bearing assembly RH/LH) Skid control ECU (master cylinder solenoid)

DTC Code

DTC Detection Condition

Trouble Area

C1277

C1278

Stored only during test mode.

Rear speed sensor RH/LH
Rear speed sensor rotor RH/LH (Rear axle hub and bearing assembly RH/LH)

C1415

C1416

One of the following conditions is met:

An open in the sensor signal circuit of a malfunctioning area occurs 255 times or more.
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.

Rear speed sensor RH/LH
Skid control sensor wire
Speed sensor circuit
Rear speed sensor rotor RH/LH (Rear axle hub and bearing assembly RH/LH)
Skid control ECU (master cylinder solenoid)

HINT:

DTCs C1415 and C1277 are for the rear speed sensor RH.
DTCs C1416 and C1278 are for the rear speed sensor LH.

WIRING DIAGRAM

Refer to DTCs C1407 and C1408 (See page CAUTION / NOTICE / HINT ).

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page ).
Check the speed sensor signal after cleaning or replacement (See page ).

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)

GO TO STEP 9

2.	READ VALUE USING TECHSTREAM (REAR SPEED SENSOR)

GO TO STEP 5

3.	PERFORM TEST MODE (SIGNAL CHECK)

(a) Perform the signal check in the Test Mode Procedure (See page OK: OK: ).

OK:

All test mode DTCs are cleared.

GO TO STEP 5

4.	RECONFIRM DTC

(a) Clear the DTCs (See page (b) Turn the ignition switch off. ).

(b) Turn the ignition switch off.

(d) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

(e) Check if the same DTC is output (See page Result ).

Result

Result	Proceed to
DTCs C1415 and C1416 are not output	A
DTCs C1415 and/or C1416 are output	B

USE SIMULATION METHOD TO CHECK

GO TO STEP 12

5.	CHECK REAR SPEED SENSOR INSTALLATION

INSTALL REAR SPEED SENSOR CORRECTLY

6.	INSPECT REAR SPEED SENSOR TIP

CLEAN OR REPLACE REAR SPEED SENSOR

7.	INSPECT REAR SPEED SENSOR ROTOR

CLEAN OR REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

8.	INSPECT SKID CONTROL SENSOR WIRE

REPLACE SKID CONTROL SENSOR WIRE

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.	INSPECT SKID CONTROL ECU (RR+, RL+ TERMINAL)

REPLACE MASTER CYLINDER SOLENOID

11.	RECONFIRM DTC

(a) Clear the DTCs (See page (b) Turn the ignition switch off. ).

(b) Turn the ignition switch off.

(d) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

(e) Check if the same DTC is output (See page Result ).

Result

Result	Proceed to
DTCs C1415 and C1416 are not output	A
DTCs C1415 and/or C1416 are output	B

USE SIMULATION METHOD TO CHECK

12.	REPLACE REAR SPEED SENSOR

13.	RECONFIRM DTC

(a) Turn the ignition switch off.

(b) Clear the DTCs (See page (c) Start the engine. ).

(d) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

(e) Check if the same DTC is output (See page Result ).

Result

Result	Proceed to
DTCs C1415 and C1416 are not output	A
DTCs C1415 and/or C1416 are output	B

END

REPLACE REAR AXLE HUB AND BEARING ASSEMBLY

Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC) (C1275,...,C1414)

DESCRIPTION Refer to DTCs C1401 and C1402 (See page ). DTC Code DTC Detection Condition Trouble Area C1275 C1276 Stored only during t ...

Open in ABS Solenoid Relay Circuit (C146E,C146F)

DESCRIPTION The ABS solenoid relay is built into the master cylinder solenoid. This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is OK, t ...

Other materials:

Steering Angle Sensor (C1A47)
DESCRIPTION The blind spot monitor sensor receives steering angle signals from the spiral cable with sensor sub-assembly via CAN communication. DTC Code DTC Detection Condition Trouble Area C1A47 A fail flag is transmitted from the ste ...

Automatic Transmission Unit(for 2tr-fe)
Components COMPONENTS ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ILLUSTRATION ...

Removal
REMOVAL PROCEDURE 1. REMOVE AIR CONDITIONING CONTROL ASSEMBLY (for Automatic Air Conditioning System) Click here 2. REMOVE AIR CONDITIONING CONTROL ASSEMBLY (for Manual Air Conditioning System) Click here 3. REMOVE LOWER NO. 2 INSTRUMENT PANEL AIRBAG ASSEMBLY Click here 4. REMOVE INSTR ...