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:
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Air conditioning system data and the Diagnostic Trouble Codes (DTCs) can
be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system
seems to be malfunctioning, use the Techstream to check for malfunctions and perform
troubleshooting.
...
Check Mode Procedure
CHECK MODE PROCEDURE
1. DESCRIPTION
(a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions
that normal mode cannot detect. Check mode can also detect all the malfunctions
that normal mode can detect. In check mode, DTCs are detected with 1 trip detection
logic.
...
ABS Warning Light Remains ON
DESCRIPTION
If any of the following is detected, the ABS warning light remains on.
The skid control ECU (master cylinder solenoid) connectors are disconnected
from the skid control ECU (master cylinder solenoid).
There is a malfunction in the skid control ECU (master cylinder soleno ...
