Toyota Tacoma (2015-2018) Service Manual: Diameter of the Tire is not Uniform (C1337)
DESCRIPTION
The skid control ECU (brake actuator assembly) 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 indicate the same speed.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1337 |
Diameter of the Tire is not Uniform |
The following occurs in 3 consecutive trips: At a vehicle speed of 20 km/h (12 mph) or more, there is a difference of 20% or more in the average speed between the front wheels and rear wheels for 20 seconds or more. |
|
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform zero point
calibration and store system information (See page
.gif)
).
PROCEDURE
|
1. |
CHECK DTC |
(a) Check if any DTCs relating to the speed sensor circuit are output (See page
).
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC is output |
B |
| B | .gif) |
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
.gif)
|
2. |
CHECK TIRE SIZE |
(a) Check the tire size and condition of all 4 wheels.
OK:
All 4 tires are the same size and in the same condition.
| NG | |
REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME SIZE AND IN THE SAME CONDITION |
|
|
3. |
RECONFIRM DTC |
(a) Clear the DTC (See page
).
(b) Turn the ignition switch off.
(c) Perform the following 3 times:
Turn the ignition switch to ON and start the engine, drive the vehicle at a speed of 30 km/h (19 mph) or more for at least 30 seconds, and then stop the vehicle and turn the ignition switch off.
(d) Check if the same DTC is output (See page
).
|
Result |
Proceed to |
|---|---|
|
DTC is output |
A |
|
DTC is not output |
B |
| A | |
REPLACE BRAKE ACTUATOR ASSEMBLY |
| B | |
USE SIMULATION METHOD TO CHECK |
Steering Angle Sensor Zero Point Malfunction (C1290)
DESCRIPTION
The skid control ECU (brake actuator assembly) acquires steering angle sensor
zero point every time the ignition switch is turned ON and the vehicle is driven
at 35 km/h (22 mph) or m ...
Stop Light Control Relay Malfunction (C1380)
DESCRIPTION
The skid control ECU (brake actuator assembly) inputs the stop light switch signal
and detect the status of the brake operation.
DTC No.
Detection Item
...
Other materials:
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
Before replacing the ECM, refer to Registration.
w/o Smart Key System: Click here
w/ Smart Key System: Click here
When the millimeter wave radar sensor assembly is replaced with a new
one, adjustment of the radar sensor beam axis must be ...
Adjustment
ADJUSTMENT
CAUTION / NOTICE / HINT
CAUTION:
Radiofrequency radiation exposure information:
This equipment complies with FCC radiation exposure limits set forth
for an uncontrolled environment.
This equipment should be kept with minimum distance of 20 cm (7.87 in.)
between the ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
NOTICE:
Make sure that the connecting surfaces are free of foreign matter.
Do not touch the main body ECU (multiplex network body ECU) connector.
(a) Set the main body ECU (multiplex ...
