DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the yaw rate and acceleration sensor (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate sensor and detects the vehicle condition.
If there is trouble in the bus lines between the acceleration sensor (airbag sensor assembly) and the CAN communication system, DTC U0124 (Lost Communication with Lateral Acceleration Sensor Module) is set.
These DTCs are also output when calibration has not been completed.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
C1436 |
Yaw Rate Sensor Malfunction |
Either of the following is detected:
|
|
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
CAUTION / NOTICE / HINT
NOTICE:
When replacing the yaw rate and acceleration sensor (airbag sensor assembly), perform zero point calibration and store system information (See page ).
HINT:
When U0124 and/or U0126 is output together with C1436, inspect and repair the trouble areas indicated by U0124 and/or U0126 first (See page ).
PROCEDURE
1. |
READ VALUE USING TECHSTREAM (YAW RATE SENSOR) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.
(e) According to the display on the Techstream, read the Data List.
(f) Check that the yaw rate sensor output value displayed on the Techstream.
ABS/VSC/TRAC
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
Yaw Rate Sensor |
Yaw rate sensor |
Min.: -128°/s Max.: 127°/s |
Vehicle stopped: 0°/s Turning right: -128 to 0°/s Turning left: 0 to 127°/s |
- |
HINT:
If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (See page ).
Result
Result |
Proceed to |
---|---|
NG (The yaw rate sensor (airbag sensor assembly) output value is 0 deg/s when the vehicle is stationary, but the value fluctuates when turning) |
A |
NG (The yaw rate sensor (airbag sensor assembly) output value is not 0 deg/s when the vehicle is stationary) |
B |
OK |
C |
B |
REPLACE AIRBAG SENSOR ASSEMBLY |
C |
USE SIMULATION METHOD TO CHECK |
|
2. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) Turn the ignition switch off.
(b) Check that the airbag sensor assembly has been installed properly (See page ).
OK:
The sensor should be tightened to the specified torque.
The sensor should not be installed in a tilted position.
OK |
REPLACE AIRBAG SENSOR ASSEMBLY |
NG |
INSTALL AIRBAG SENSOR ASSEMBLY |
Sound Quality is Bad Only when CD is Played (Volume is Too Low)
PROCEDURE
1.
REPLACE CD AND RECHECK
(a) Replace the CD with a known good one and recheck.
(1) Check if the same malfunction occurs again.
OK:
Malfunction disappears.
OK
END
NG
REPLACE NAVIGATION RECEIVER ASSEMBLY ...
Open or Short in Rear Speed Sensor RH Circuit (C1407,C1408)
DESCRIPTION
Refer to DTCs C1403 and C1404 (See page ).
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1407
Open or Short in Rear Speed Sensor RH Circuit
Either of the following is detected:
...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...