Toyota Tacoma (2015-2018) Service Manual: 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. |
|
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
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- 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 |
| B | .gif) |
GO TO VEHICLE STABILITY CONTROL SYSTEM |
| C | |
GO TO VEHICLE STABILITY CONTROL SYSTEM |
|
.gif)
|
2. |
CHECK FOR DTCs (CRUISE CONTROL SYSTEM) |
(a) Clear the DTCs.
Click here
(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.
(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:
Road Test
ROAD TEST
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem analysis, try to reproduce the
symptoms. If the problem is that the transmission does not shift up or down, or
that the shift point is too high or too low, conduct the following road test referring
to t ...
Test Mode Procedure
TEST MODE PROCEDURE
1. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK
(a) When the ignition switch is turned ON, check that the ABS warning, brake
warning, and slip indicator lights come on for approximately 3 seconds.
HINT:
When the brake fluid level is low, the brake warning light c ...
Acceleration Sensor Internal Circuit (C1419,C1435)
DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the yaw
rate and acceleration (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and
detects the vehicle's condition using 2 ...
