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 ...

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DESCRIPTION The BRAKE warning light comes on when brake fluid is insufficient, the parking brake is applied or the EBD is defective. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page ...

Data List / Active Test
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