Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Lost Communication with Yaw Rate Sensor Module (U0123,U0126,U0129,U0142,U0155)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Lane Departure Alert System / 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.

  • CAN communication system
  • Yaw rate and acceleration sensor (airbag sensor assembly)
  • Forward recognition camera

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.

  • CAN communication system
  • Spiral cable with sensor sub-assembly
  • Forward recognition camera

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.

  • CAN communication system
  • Skid control ECU (brake actuator assembly)*1
  • Skid control ECU (master cylinder solenoid)*2
  • Forward recognition camera

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.

  • CAN communication system
  • Main body ECU (Multiplex network body ECU)
  • Forward recognition camera

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.

  • CAN communication system
  • Combination meter assembly
  • Forward recognition camera
  • *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 (f) Make sure that the DTC detection conditions are met.

(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

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:

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page". DTC Code Detection Item See page B1500 F ...

Inspection
INSPECTION PROCEDURE 1. INSPECT TIE ROD END SUB-ASSEMBLY (a) Flip the ball joint stud back and forth 5 times as shown in the illustration before installing the nut. (b) Using a torque wrench, turn the nut continuously at a rate of 2 to 4 seconds per turn and check the torque reading on the ...

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 Trouble Area C1AA0 Front Camera Module Circuit 3 seconds ...

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