Toyota Tacoma (2015-2018) Service Manual: Diameter of the Tire is not Uniform (C1337)

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Diameter of the Tire is not Uniform (C1337)

DESCRIPTION

The skid control ECU (master cylinder solenoid) measures the speed of each wheel by receiving signals from the speed sensors. These signals are used for recognizing whether all 4 wheels are operating properly. Therefore, all wheel signals must be equal.

DTC No.	DTC Detecting Condition	Trouble Areas
C1337	When either one of following condition detected: Diameters different of 2 front wheels and 2 rear wheels. Wheel speed sensor fault	Speed sensor Speed sensor rotor Speed sensor circuit Tire sizes

CAUTION / NOTICE / HINT

NOTICE:

Check the speed sensor signal after replacement (See page PROCEDURE ).

PROCEDURE

1.	CHECK TIRE SIZE

(a) Check tire size and condition of all 4 wheels.

OK:

All 4 wheels are the same size and in the same condition.

REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME IN SIZE

2.	CHECK SPEED SENSOR ROTOR

(a) Remove the drive shaft, and check around the speed sensor rotor.

OK:

No scratches or foreign matter on the sensor tip.

REPLACE SPEED SENSOR ROTOR

3.	CHECK SPEED SENSOR

(a) Check the speed sensor circuit.

Front speed sensor (See page ).
Rear speed sensor (See page ).

REPLACE SPEED SENSOR

4.	CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - EACH SPEED SENSOR)

(a) Check the speed sensor circuit .

Front speed sensor (See page ).
Rear speed sensor (See page ).

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	RECONFIRM DTC

(a) Clear the DTCs (See page (b) Drive the vehicle at more than 20 km/h (13 mph) for more than 60 seconds. ).

(b) Drive the vehicle at more than 20 km/h (13 mph) for more than 60 seconds.

Result	Proceed to
DTC output	A
DTC not output	B

REPLACE MASTER CYLINDER SOLENOID

END

Steering Angle Sensor Zero Point Malfunction (C1290)

DESCRIPTION The skid control ECU (master cylinder solenoid) acquires steering angle sensor zero point every time the ignition switch is turned to ON and the vehicle is driven at 35 km/h (22 mph) ...

Downhill Assist Control Switch Malfunction (Test Mode DTC) (C1379)

DESCRIPTION DTC C1379 is cleared when the crawl control switch sends a crawl control operation signal or when test mode ends. DTC Code DTC Detection Condition Trou ...

Other materials:

Light Sensor Circuit Malfunction (B1244)
DESCRIPTION This DTC is output when a failure of the automatic light control sensor circuit is detected. DTC Code DTC Detection Condition Trouble Area B1244 When either condition below is met: Malfunction of light sensor ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

System Voltage Circuit Short to Ground or Open (P056014)
DESCRIPTION The battery supplies power to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, the ECM data is cleared and the ECM determines that ...