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:

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

GO TO VEHICLE STABILITY CONTROL SYSTEM

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.

Turn the ignition switch to ON.
Turn the dynamic radar cruise control system on using the cruise control main switch.
Wait for 1 second or more.

Click here

Result	Proceed to
DTC P163181 is not output	A
DTC P163181 is output	B

USE SIMULATION METHOD TO CHECK

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:

Disassembly
DISASSEMBLY PROCEDURE 1. REMOVE TAIL GATE PROTECTOR (See page ) 2. REMOVE TAIL GATE SERVICE HOLE COVER (a) Using a T30 "TORX" socket wrench, remove the 8 screws and tail gate service hole cover. 3. REMOVE REAR TELEVISION CAMER ...

Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be ...

System Description
SYSTEM DESCRIPTION GENERAL The cruise control main switch is used to turn the dynamic radar cruise control system on and off, as well as operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP and CANCEL. The SET, TAP-DOWN, and - (COAST) functions, and the RES (RESUME) ...