DESCRIPTION
The steering angle sensor signal is sent to the skid control ECU via the CAN communication system. When there is a malfunction in the CAN communication system, it will be detected by the steering angle sensor zero point malfunction diagnostic function.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
C1231/31 |
When ECU IG1 terminal voltage is 9.5 V or more, the steering angle sensor malfunction signal is received. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
PROCEDURE
1. |
CHECK DTC |
(a) Clear the DTCs (See page ).
(b) Turn the ignition switch off.
(c) Turn the ignition switch to ON again and check that no CAN communication
system DTC is output (See page ).
(d) Drive the vehicle and turn the steering wheel to the right and left at a
speed of 35 km/h (22 mph) and check that no speed sensor and yaw rate and acceleration
sensor DTCs are output (See page ).
Result |
Proceed to |
---|---|
No CAN communication system DTC and the speed sensor or yaw rate and acceleration sensor DTC are output |
A |
CAN communication system DTC is output |
B |
Speed sensor or yaw rate and acceleration sensor DTC is output |
C |
HINT:
B | ![]() |
INSPECT CAN COMMUNICATION SYSTEM |
C | ![]() |
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS |
|
2. |
INSPECT STEERING ANGLE SENSOR (POWER SOURCE TERMINAL) |
(a) Turn the ignition switch off. |
|
(b) Remove the steering wheel and the column cover.
(c) Make sure that there is no looseness at the locking part and the connecting part of the connector.
(d) Disconnect the steering angle sensor connector.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D35-5 (IG) - Body ground |
Ignition switch ON |
11 to 14 V |
D35-6 (BAT) - Body ground |
Always |
11 to 14 V |
*1 |
Front view of wire harness connector (to Spiral Cable Sub-assembly (Steering Angle Sensor)) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
3. |
INSPECT STEERING ANGLE SENSOR (GROUND TERMINAL) |
(a) Turn the ignition switch off. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D35-2 (ESS) - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Spiral Cable Sub-assembly (Steering Angle Sensor)) |
HINT:
If troubleshooting has been carried out according to Problem Symptoms Table,
refer back to the table and proceed to the next step (See page
).
OK | ![]() |
REPLACE SPIRAL CABLE SUB-ASSEMBLY (STEERING ANGLE SENSOR) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) |
Inspection
INSPECTION
PROCEDURE
1. INSPECT SHIFT SOLENOID VALVE SL
(a) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*1
Shift Solenoid Valve SL
Standard Re ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT THERMOSTAT
HINT:
The valve opening temperature is inscribed on the thermostat.
(a) Immerse the thermostat in water, and then gradually heat the water.
(b) Check t ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL TRANSMISSION CONTROL CABLE ASSEMBLY
NOTICE:
Before installing the transmission control cable assembly, check that the park/neutral
position switch and the shift lever are in neutral.
(a) Pass the control cable from the ...