Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Communication Error from ECM to VSC Invalid Serial Data Received (P163181)

Toyota Tacoma 2015-2018 Service Manual / Cruise Control / Dynamic Radar Cruise Control System(for 2gr-fks) / Communication Error from ECM to VSC Invalid Serial Data Received (P163181)

DESCRIPTION

The ECM sends signals such as dynamic radar cruise control operation signals, brake operation demand signals and buzzer operation demand signals to the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 when the dynamic radar cruise control is operating. Therefore, if the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 detects a communication error with the ECM, it sends a malfunction signal back to the ECM.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

P163181

Communication Error from ECM to VSC Invalid Serial Data Received

While the ignition switch is ON and the dynamic radar cruise control system is operating, the ECM continuously receives a logic error signal from the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 for approximately 1 second or more.

  • Vehicle stability control system
  • ECM

Does not come on

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

CAUTION / NOTICE / HINT

NOTICE:

  • First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.

    Click here

  • Before replacing the ECM, refer to Registration.

    w/o Smart Key System: w/ Smart Key System:

    w/ Smart Key System:

PROCEDURE

1.

CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

(a) Check for DTCs.

  • for Hydraulic Brake Booster

    Click here

  • for Vacuum Brake Booster

    Click here

Result

Proceed to

DTCs are not output

A

DTCs are output (for Hydraulic Brake Booster)

B

DTCs are output (for Vacuum Brake Booster)

C

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

C

GO TO VEHICLE STABILITY CONTROL SYSTEM

A

2.

CHECK FOR DTCs (CRUISE CONTROL SYSTEM)

(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. Wait for 1 second or more.

(c) Check for DTCs.

Click here

Result

Proceed to

DTC P163181 is not output

A

DTC P163181 is output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE ECM

Vehicle Control History
VEHICLE CONTROL HISTORY VEHICLE CONTROL HISTORY HINT: A part of the control history can be confirmed using the vehicle control history. Click here ...

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 ...

Other materials:

Terminals Of Ecu
TERMINALS OF ECU 1. NAVIGATION RECEIVER ASSEMBLY Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition N19-3 (ACC2) - N24-7 (GND1)*3 Y - W-B Power source (ACC) ...

Terminals Of Ecu
TERMINALS OF ECU 1. CLEARANCE WARNING ECU ASSEMBLY (a) Disconnect the C30 connector from the clearance warning ECU assembly. (b) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Color Terminal Descr ...

Clearance Warning ECU Power Source Circuit
DESCRIPTION This circuit provides power to operate the clearance warning ECU assembly. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuse for circuits related to this system before performing the following inspection procedure. PROCEDURE 1. CHECK HARNES ...

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