C1381

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1381: Acceleration Sensor Power Supply Voltage Malfunction
C1381 - Acceleration Sensor Power Supply Voltage Malfunction

DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.

The yaw rate sensor 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 and acceleration sensor and the CAN communication system, DTCs U0123 (Lost Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) are stored.

These DTCs are also stored when calibration has not been completed.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the yaw rate and acceleration sensor, perform calibration Programming and Relearning.
* Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1. CHECK TERMINAL VOLTAGE (IG)

(a) Disconnect the yaw rate and acceleration sensor connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IG CIRCUIT)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)

(a) Disconnect the yaw rate and acceleration sensor connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





HINT
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next suspected area Problem Symptoms Table.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK -- Continue to next step.

3. RECONFIRM DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Turn the ignition switch off.

(c) Start the engine.

(d) Drive the vehicle at a speed of 3 km/h (2 mph) or more for at least 10 seconds.

(e) Check if the same DTC is output Reading and Clearing Diagnostic Trouble Codes.

Result





NG -- REPLACE YAW RATE AND ACCELERATION SENSOR Removal

OK -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting