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:
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE REAR BUMPER HOLE COVER
(a) Disengage the 2 clips to remove the rear bumper hole cover.
2. REMOVE REAR BUMPER PAD SUB-ASSEMBLY
(a) Separate the 2 license plate light assemblies as shown in the illustr ...
High Power Supply Voltage Malfunction (C1417)
DESCRIPTION
If a malfunction is detected in the power supply circuit, the skid control ECU
(brake actuator assembly) stores this DTC and the fail-safe function prohibits ABS
operation.
This DTC is stored when the +BS terminal voltage deviates from the DTC detection
condition due to a malfunc ...
Check Bus 2 Line for Short to +B
DESCRIPTION
There may be a short circuit between one of the CAN bus lines and +B when no
resistance exists between terminal 18 (CA4H) of the central gateway ECU (network
gateway ECU) and terminal 16 (BAT) of the DLC3, or terminal 17 (CA4L) of the central
gateway ECU (network gateway ECU) and ...
