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 |
Disposal
DISPOSAL
PROCEDURE
1. DISPOSE OF FRONT SHOCK ABSORBER ASSEMBLY
(a) Fully extend the shock absorber piston rod, and fix it at an angle in a vise
or similar tool.
(b) Using a drill or similar tool, slowly make a hole in the shaded area shown
in the illustration, and discharge the gas inside. ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
When replacing the skid control ECU (brake actuator assembly), sensor, etc.,
turn the ignition switch off.
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the s ...
Clutch Pedal Switch
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK CLUTCH START SYSTEM
(a) Check that the engine does not start when the clutch pedal is released.
(b) Check that the engine starts when the clutch pedal is fully depressed.
If necessary, replace the clutch start switch assembly.
...