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 |
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 |
Pressure Control Solenoid "A" Performance (Shift Solenoid Valve SL1) (P0746)
SYSTEM DESCRIPTION
The ECM uses the vehicle speed signal and signals from the transmission revolution
sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear).
The ECM compares the actual gear with the shift schedule in the ECM memory to
detect mechanical problems of t ...
Tire Pressure Warning Light Circuit
DESCRIPTION
If the tire pressure warning ECU and receiver detects any problems, the tire
pressure warning light blinks for 1 minute then illuminates, and tire pressure monitoring
is disabled at the same time. At this time, the ECU stores a DTC in memory.
Connecting terminals TC and CG of the D ...
Installation
INSTALLATION
PROCEDURE
1. SET NO. 1 CYLINDER TO TDC/COMPRESSION
2. INSTALL CAMSHAFT TIMING GEAR BOLT
NOTICE:
There are different types of camshaft timing gearbolts. Make sure to check the
identification mark todetermine the tightening torque.
*a
Identification Mark ...