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 |
---|---|---|
C1436 |
Either condition is met:
|
|
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
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. |
READ VALUE USING TECHSTREAM (YAW RATE SENSOR) |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
ABS/VSC/TRAC
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|
Yaw Rate Sensor |
Yaw rate and acceleration sensor 1 reading/ Min.: -128°/s, Max.: 127°/s |
0°/s: Vehicle stationary -128 to 0°/s: Right turn 0 to 127°/s: Left turn |
- |
(f) Check that the yaw rate and acceleration sensor output value is displayed on the Techstream.
Result
Result |
Proceed to |
|
---|---|---|
NG |
Yaw rate and acceleration sensor output value is 0°/s when vehicle is stationary, but value fluctuates when turning |
A |
Yaw rate and acceleration sensor output value is not 0°/s when vehicle is stationary |
B |
|
OK |
C |
B |
REPLACE AIRBAG SENSOR ASSEMBLY |
C |
USE SIMULATION METHOD TO CHECK |
|
3. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Turn the ignition switch off.
(b) Check that the yaw rate and acceleration sensor (airbag sensor assembly) is installed properly (See page ).
OK:
The sensor is tightened to the specified torque.
The sensor is not installed at an angle.
OK |
REPLACE AIRBAG SENSOR ASSEMBLY |
NG |
INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY |
Unable to Lock Steering Wheel
DESCRIPTION
The steering lock actuator assembly activates the steering lock motor and moves
the lock bar into the steering column to lock the steering.
When the steering lock is operating, the steering may not lock when the lock
bar is not aligned with the lock hole of the steering column. In ...
System Description
SYSTEM DESCRIPTION
1. DESCRIPTION
The differential system (w/ Differential Lock) directly connects the
rear left and right wheels so that even if one wheel slips while driving
where drive torque transmission is difficult (such as on sand), the drive
torque of the other wheel is ...
Check For Intermittent Problems
CHECK FOR INTERMITTENT PROBLEMS
HINT:
Inspect the vehicle ECM using check mode. Intermittent problems are easier to
detect with the Techstream when the ECM is in check mode. In check mode, the ECM
uses 1 trip detection logic, which is more sensitive to malfunctions than normal
mode (default) ...