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 |
---|---|---|
C1232 |
At vehicle speed of 10 km/h (6 mph) or more, signal from either GL1 or GL2 does not change for 30 seconds or more. |
|
C1243 |
Following condition repeats 16 times.
|
|
C1245 |
Following condition continues for at least 60 seconds.
|
|
C1279 |
Detected only during test mode |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
HINT:
When U0073, U0100, U0123, U0124 or U0126 are output together with C1232 or C1234, inspect and repair the trouble areas indicated by U0073, U0100, U0123, U0124 or U0126 first.
PROCEDURE
1. |
CHECK DTC |
(a) Clear the DTCs (See page ).
(b) Turn the ignition switch off.
(c) Check if DTCs U0073, U0123, C1210 and/or C1336 are output (See page ).
Result
Result |
Proceed to |
---|---|
DTC U0073, U0123, C1210 and/or C1336 are not output |
A |
DTC U0073 and/or U0123 are output |
B |
DTC C1210 and/or C1336 are output |
C |
B |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
C |
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
2. |
CHECK AIRBAG SENSOR ASSEMBLY INSTALLATION |
(a) 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 tilted.
NG |
INSTALL AIRBAG SENSOR ASSEMBLY CORRECTLY |
|
3. |
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:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A21-21 (IG2) - Body ground |
Ignition switch ON |
11 to 14 V |
(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)) |
Result |
Proceed to |
---|---|
OK (When troubleshooting in accordance with Diagnostic Trouble Code Chart) |
A |
OK (When troubleshooting in accordance with Problem Symptoms Table) |
B |
NG |
C |
A |
REPLACE AIRBAG SENSOR ASSEMBLY |
B |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
C |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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 ...
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 ...
Installing child restraints
Follow the child restraint system manufacturer’s instructions. Firmly secure
child restraints to the seats using the LATCH anchors or a seat belt. Attach the
top tether strap when installing a child restraint.
The lap/shoulder belt can be used if your child restraint system is not compatible ...