DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK DTC (CAN COMMUNICATION SYSTEM)
CHECK HARNESS AND CONNECTOR (IG/+B TERMINAL)
CHECK HARNESS AND CONNECTOR (GND TERMINAL)
RECONFIRM DTC
DTC C1381 Acceleration Sensor Power Supply Voltage Malfunction
DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the yaw rate sensor assembly via the CAN communication system.
The yaw rate sensor assembly has a built-in 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 sensor assembly and the CAN communication system, DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the acceleration sensor) are stored.
These DTCs are also stored when calibration has not been completed.
| DTC Code | DTC Detection Condition | Trouble Area |
| C1381 |
At a vehicle speed of more than 3 km/h (2 mph), the acceleration sensor power source malfunction signal is received for 10 seconds or more. |
ECU-IG No. 2 fuse
ECU-B1 fuse
Yaw rate sensor assembly
Yaw rate sensor assembly power source circuit
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WIRING DIAGRAM
Refer to DTCs C1232, C1243 and C1245 ().
INSPECTION PROCEDURE
After replacing the yaw rate sensor assembly, perform calibration ().
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
| 1.CHECK DTC (CAN COMMUNICATION SYSTEM) |
Check for DTCs ().
Result| Result | Proceed to |
| CAN DTC is not output | A |
| CAN DTC is output (for LHD) | B |
| CAN DTC is output (for RHD) | C |
| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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| | GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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| 2.CHECK HARNESS AND CONNECTOR (IG/+B TERMINAL) |
Turn the ignition switch off.
Disconnect the yaw rate sensor assembly connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition | Specified Condition |
| E50-4 (IG) - Body ground | Ignition switch ON | 11 to 14 V |
| E50-6 (+B) - Body ground | Always | 11 to 14 V |
Text in Illustration| *a |
Front view of wire harness connector
(to Yaw Rate Sensor Assembly) |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| 3.CHECK HARNESS AND CONNECTOR (GND TERMINAL) |
Turn the ignition switch off.
Disconnect the yaw rate sensor assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E50-1 (GND) - Body ground | Always | Below 1 Ω |
Text in Illustration| *a |
Front view of wire harness connector
(to Yaw Rate Sensor Assembly) |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Reconnect the yaw rate sensor assembly connector.
Turn the ignition switch off.
Check if the same DTC is output ().
Result| Result | Proceed to |
| DTC C1381 is not output | A |
| DTC C1381 is output | B |
| | REPLACE YAW RATE SENSOR ASSEMBLY ()
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| A | |
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| CHECK FOR INTERMITTENT PROBLEMS ()
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