Toyota Tacoma 2015-2018 Service Manual: Lost Communication with Yaw Rate Sensor Module (U0123,U0126,U0129,U0142,U0155)
DESCRIPTION
These DTCs are output when a communication malfunction occurs between the sensors and ECUs.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
U0123 |
Lost Communication with Yaw Rate Sensor Module |
3 seconds after the ignition switch is turned to ON, the vehicle is being driven at 5 km/h (3 mph) or more and a communication error between the yaw rate sensor and the forward recognition camera is detected for approximately 5 seconds or more. |
|
|
U0126 |
Lost Communication With Steering Angle Sensor Module |
3 seconds after the ignition switch is turned to ON, a communication error between the spiral cable with sensor sub-assembly and the forward recognition camera is detected for approximately 5 seconds or more. |
|
|
U0129 |
Lost Communication with Brake System Control Module |
3 seconds after the ignition switch is turned to ON, a communication error between the skid control ECU (brake actuator assembly) and the forward recognition camera is detected for approximately 5 seconds or more. |
|
|
U0142 |
Lost Communication with Body Control Module "B" |
3 seconds after the ignition switch is turned to ON, a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more. |
|
|
U0155 |
Lost Communication with Combination Meter |
3 seconds after the ignition switch is turned to ON, a communication error between the combination meter assembly and the forward recognition camera is detected for approximately 50 seconds or more. |
|
- *1: for Vacuum Brake Booster
- *2: for Hydraulic Brake Booster
PROCEDURE
|
1. |
CHECK FOR DTCs |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
(e) Clear the DTCs.
Click here .gif)
(f) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(g) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.
(h) Check the DTCs.
Click here
|
Result |
Proceed to |
|---|---|
|
DTC U0123, U0126, U0129, U0142 and U0155 are not output |
A |
|
DTC U0123, U0126, U0129, U0142 or U0155 is output |
B |
| A | .gif) |
USE SIMULATION METHOD TO CHECK |
| B | |
GO TO CAN COMMUNICATION SYSTEM |
Front Camera Module Circuit (C1AA0)
DESCRIPTION
When an internal malfunction is detected in the forward recognition camera, DTC
C1AA0 is stored.
DTC No.
Detection Item
DTC Detection Condition
...
Vehicle Speed Sensor Circuit (C1AA3)
DESCRIPTION
The forward recognition camera receives vehicle speed signals from the skid control
ECU. If the skid control ECU receives a vehicle speed sensor malfunction signal,
it informs the for ...
Other materials:
Certification Ecu
Components
COMPONENTS
ILLUSTRATION
Installation
INSTALLATION
PROCEDURE
1. INSTALL CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
(a) Install the certification ECU (smart key ECU assembly) with the 2 nuts.
Torque:
6.5 N·m {66 kgf·cm, 58 in·lbf}
(b) Engage the clamp to install the wire ...
Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)
DESCRIPTION
This DTC is stored when items controlled by the certification ECU (smart key
ECU assembly) cannot be customized via the audio and visual system vehicle customization
screen.
HINT:
The certification ECU (smart key ECU assembly) controls the smart key system
related items that are ...
Dtc Check / Clear
DTC CHECK / CLEAR
1. DTC CHECK USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
(e) Check for DTCs.
2. DTC CLEAR USING TECHSTREAM
(a) Conn ...