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 |
CAUTION / NOTICE / HINT
NOTICE:
Click here
w/o Smart Key System:
w/ Smart Key System:
PROCEDURE
1. |
CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) |
(a) Check for DTCs.
Click here
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 |
|
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.
(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 |
Terminals Of Ecu
TERMINALS OF ECU
1. NAVIGATION RECEIVER ASSEMBLY
Terminal No. (Symbols)
Wiring Color
Terminal Description
Condition
Specified Condition
N19-3 (ACC2) - N24-7 (GND1)*3
Y - W-B
Power source (ACC)
...
Terminals Of Ecu
TERMINALS OF ECU
1. CLEARANCE WARNING ECU ASSEMBLY
(a) Disconnect the C30 connector from the clearance warning ECU assembly.
(b) Measure the voltage and resistance according to the value(s) in the table
below.
Terminal No. (Symbol)
Wiring Color
Terminal Descr ...
Clearance Warning ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the clearance warning ECU assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuse for circuits related to this system before performing the following
inspection procedure.
PROCEDURE
1.
CHECK HARNES ...