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:

Clutch start cancel switch
The switch allows the vehicle to be driven out of difficult situations by cranking the engine with the clutch engaged. Never use the switch for normal engine starting. Be sure to follow the starting procedure. Press the CLUTCH START CANCEL switch to cancel the clutch start system when the ...

Voice is not Recognized
PROCEDURE 1. CHECK CONDITION (a) Check if the system voice recognition level is low for a particular voice. Result Result Proceed to System voice recognition level is low for any voice. A System vo ...

Speed Signal Malfunction (B15C2)
DESCRIPTION The navigation receiver assembly receives a vehicle speed signal from the combination meter assembly and information from the navigation antenna assembly, and then adjusts the vehicle position. The navigation receiver assembly stores this DTC when the difference between the speed ...

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