Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Lost Communication with ECM / PCM "A" (U0100,U0101,U0123,U0126,U0129,U0142,U0155)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Forward Recognition Camera System / Lost Communication with ECM / PCM "A" (U0100,U0101,U0123,U0126,U0129,U0142,U0155)

DESCRIPTION

When a malfunction is detected between various ECUs and sensors, these DTCs are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

After the ignition switch is turned to ON for 3 seconds or more, when the vehicle is being driven at a speed of 1 km/h or 1 mph or more, a communication error between the ECM and forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system
  • ECM
  • Forward recognition camera

U0101

Lost Communication with TCM

After the ignition switch is turned to ON for 3 seconds or more, when the vehicle is being driven at a speed of 1 km/h or 1 mph or more, a communication error between the TCM (ECM) and forward recognition camera is detected for approximately 5 seconds or more.

  • CAN communication system
  • TCM (ECM)
  • Forward recognition camera

U0123

Lost Communication with Yaw Rate Sensor Module

After the ignition switch is turned to ON for 3 seconds or more, when the vehicle is being driven at a speed of 1 km/h or 1 mph or more, a communication error between the yaw rate and acceleration sensor (airbag sensor assembly) and 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)
  • 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

PROCEDURE

1.

CHECK FOR DTCs (FORWARD RECOGNITION CAMERA SYSTEM)

(a) Clear the DTCs.

Click here (b) Make sure that the DTC detection conditions are met.

(b) Make sure that the DTC detection conditions are met.

HINT:

If the conditions are not met, the system cannot detect the malfunction.

(c) Check for DTCs.

Click here

Result

Proceed to

DTC U0100, U0101, U0123, U0126, U0129, U0142 or U0155 are not output

A

DTC U0100, U0101, U0123, U0126, U0129, U0142 or U0155 is output

B

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Forward Recognition Camera System DTC No. Detection Item Link C1A0A Front Radar Sensor Region Code Mismatch ...

Yaw Rate Sensor Circuit (C1AA4,C1AA5)
DESCRIPTION The forward recognition camera receives vehicle stability signals from the yaw rate and acceleration sensor (airbag sensor assembly). If the yaw rate and acceleration sensor (airbag s ...

Other materials:

Rear view monitor system
The rear view monitor system assists the driver by displaying guide lines and an image of the view behind the vehicle while backing up, for example while parking. The screen illustrations used in this text are intended as examples, and may differ from the image that is actually displayed on the ...

Removal
REMOVAL PROCEDURE 1. REMOVE NO. 2 ENGINE UNDER COVER SUB-ASSEMBLY (w/ Off Road Package) 2. REMOVE NO. 1 ENGINE UNDER COVER SUB-ASSEMBLY 3. REMOVE FAN AND GENERATOR V BELT 4. DRAIN POWER STEERING FLUID 5. REMOVE FRONT FENDER APRON UPPER SEAL RH 6. DISCONNECT NO. 1 OIL RESERVOIR TO PUMP ...

Lost Communication with Meter (B1324)
DESCRIPTION This DTC is stored when a communication error occurs between the navigation receiver assembly and combination meter assembly. DTC No. DTC Detection Condition Trouble Area B1324 After the navigation receiver assembly receive ...

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