Toyota Tacoma manuals

Toyota Tacoma (2015-2018) Service Manual: Communication Error from VSC to ECM Invalid Serial Data Received (P163081)

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Dynamic Radar Cruise Control System(for 2gr-fks) / Communication Error from VSC to ECM Invalid Serial Data Received (P163081)

DESCRIPTION

The skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 sends signals such as cruise control cancel signals and brake demand response signals to the ECM when the dynamic radar cruise control system is operating.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

P163081

Communication Error from VSC to ECM Invalid Serial Data Received

While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, communication data from the skid control ECU (master cylinder solenoid)*1 or skid control ECU (brake actuator assembly)*2 is logically inconsistent for approximately 0.5 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: Click here w/ Smart Key System: Click here

    w/ Smart Key System: Click here

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

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. Drive the vehicle at 36 km/h (22 mph) or more for 1 second or more.

(c) Check for DTCs.

Click here

Result

Proceed to

DTC P163081 is not output

A

DTC P163081 is output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE ECM

Cruise Control Input Processor (P160700)
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Brake Switch "A" Signal Compare Failure (P057162)
DESCRIPTION When the brake pedal is depressed, the stop light switch assembly sends a signal to the ECM. When the ECM receives this signal, it cancels the dynamic radar cruise control. The fail-s ...

Other materials:

Terminals Of Ecm
TERMINALS OF ECM 1. ECM HINT: The standard voltage between each pair of ECM terminals is shown in the table below. In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol)" for the terminals to be inspected. The standard voltage b ...

Reassembly
REASSEMBLY PROCEDURE 1. INSTALL BRAKE BOOSTER ACCUMULATOR ASSEMBLY (a) Place the brake booster pump in a vise with a cloth. (b) Install the brake booster accumulator pipe, compression spring and a new O-ring. NOTICE: Ensure that no foreign matter enters the pump. (c) Using a socket wrench ...

System Description
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