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 circuits (GL1, GL2).
If there is trouble in the bus lines between the yaw rate and acceleration sensor (airbag sensor assembly) and the CAN communication system, DTCs U0123 (yaw rate sensor communication trouble) and U0124 (acceleration sensor communication trouble) are stored.
These DTCs are also output when calibration has not been completed.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1381 |
At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more. |
|
WIRING DIAGRAM
Refer to DTCs C1232, C1243 and C1245 (See page
).
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check for DTCs (See page
).
Result |
Proceed to |
---|---|
CAN DTC is not output |
A |
CAN DTC is output |
B |
B | ![]() |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
2. |
CHECK HARNESS AND CONNECTOR (IG2, E1, E2 TERMINAL) |
(a) Disconnect the yaw rate and acceleration sensor (airbag sensor assembly) connector.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
A21-25 (E1) - Body ground |
Always |
Below 1 Ω |
A21-26 (E2) - Body ground |
Always |
Below 1 Ω |
*a |
Front view of wire harness connector (to Yaw Rate and Acceleration Sensor (Airbag Sensor Assembly)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
RECONFIRM DTC |
(a) Reconnect the yaw rate and acceleration sensor (airbag sensor assembly) connector.
(b) Clear the DTCs (See page
).
(c) Start the engine.
(d) Perform a road test.
(e) Check if the same DTC is output (See page
).
Result |
Proceed to |
---|---|
DTC C1381 is not output |
A |
DTC C1381 is output |
B |
A | ![]() |
USE SIMULATION METHOD TO CHECK |
B | ![]() |
REPLACE AIRBAG SENSOR ASSEMBLY |
Components
COMPONENTS
ILLUSTRATION
*1
FORWARD RECOGNITION CAMERA
*2
FORWARD RECOGNITION LATCH
*3
NO. 1 FORWARD RECOGNITION COVER
-
-
...
Clearance Sonar Main Switch Circuit
DESCRIPTION
The back sonar or clearance sonar switch assembly is installed at the base of
the driver side of the instrument panel.
When the back sonar or clearance sonar switch assembly is turned on, an on signal
is sent to the clearance warning ECU assembly. The intuitive parking assist syste ...
Diagnosis System
DIAGNOSIS SYSTEM
DIAGNOSIS FUNCTION
(a) The diagnosis function turns off the cruise control indicator, illuminates
the master warning light and displays a warning message when a malfunction is detected.
When a malfunction is detected in the dynamic radar cruise control system, DTCs
are store ...