Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Lost Communication With ECM/PCM "A" Missing Message (U010087,U010487,U012287)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Dynamic Radar Cruise Control System(for 2gr-fks) / Lost Communication With ECM/PCM "A" Missing Message (U010087,U010487,U012287)

DESCRIPTION

The ECM communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

U010087

Lost Communication With ECM/PCM "A" Missing Message

While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, the ECM continuously receives a communication cut-off signal from the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 for approximately 1 second or more.

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

Does not come on

U010487

Lost Communication with Cruise Control Module Missing Message

When the ignition switch is ON and the dynamic radar cruise control system is operating, a communication error between the millimeter wave radar sensor assembly and ECM is detected for 1 second or more.

  • CAN communication system
  • ECM
  • Millimeter wave radar sensor assembly

Does not come on

U012287

Lost Communication with Vehicle Dynamics Control Module Missing Message

When the ignition switch is ON and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 and the ECM is detected for approximately 2.6 seconds or more.

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

Does not come on

  • *1: for Hydraulic Brake Booster
  • *2: for Vacuum Brake Booster

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Click here (b) Perform the following procedure.

(b) Perform the following procedure.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

  1. Turn the ignition switch to ON.
  2. Turn the dynamic radar cruise control system on using the cruise control main switch.
  3. Drive the vehicle at 36 km/h (22 mph) or more for 5 seconds or more.

(c) Check for DTCs.

Click here

Result

Proceed to

DTC U010087, U010487 and U012287 are not output

A

DTC U010087, U010487 or U012287 is output

B

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129)
DESCRIPTION The millimeter wave radar sensor assembly and ECM communicate with each sensor and ECU via CAN communication. If any malfunction is detected in a CAN communication circuit, one or more ...

Brake System (P157800)
DESCRIPTION This DTC is stored when a malfunction is detected in the vehicle stability control system. DTC No. Detection Item DTC Detection Condition Tr ...

Other materials:

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART NOTICE: When removing any parts, turn the ignition switch off. HINT: If no abnormality is found when inspecting parts, check the skid control ECU and check for poor contact at ground points. When 2 or more DTCs are detected, perform each circuit insp ...

System Diagram
SYSTEM DIAGRAM Communication Table Sender Receiver Signal Line *1: for Vacuum Brake Booster *2: for Hydraulic Brake Booster Millimeter Wave Radar Sensor Assembly Forward Recognition Camera ...

Components
COMPONENTS ILLUSTRATION HINT: The following specifications are for BD20D (w/o Differential Lock). BD20D differentials are equipped with M8 rear differential carrier to rear axel housing fasteners. ILLUSTRATION ILLUSTRATION ...

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