C1381

BRAKE CONTROL: 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 deceleration sensor via the CAN communication system.

The yaw rate sensor has a built-in deceleration sensor and detects the vehicle condition using 2 circuits (GL1, GL2).

If there is trouble in the bus lines between the yaw rate and deceleration sensor 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.





WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 C1232.

INSPECTION PROCEDURE

NOTICE:
When replacing the yaw rate sensor assembly, perform zero point calibration Component Tests and General Diagnostics.

HINT
When U0123, U0124 and/or U0126 is output together with C1381, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first U Code Charts.

PROCEDURE

1. INSPECT YAW RATE AND DECELERATION SENSOR (IG TERMINAL)

(a) Make sure that there is no looseness in the locking part and connecting part of the connector.





(b) Disconnect the yaw rate and deceleration sensor connector.

(c) Turn the ignition switch to ON.

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

Standard Voltage:





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

2. INSPECT YAW RATE AND DECELERATION SENSOR (GND TERMINAL)

(a) Turn the ignition switch off.





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

Standard Resistance:





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

3. RECONFIRM DTC

(a) Reconnect the yaw rate and deceleration sensor connector.

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

(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:





NOTICE:
Check the yaw rate and deceleration sensor signal after replacement Test Mode Procedure.

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

B -- REPLACE YAW RATE SENSOR ASSEMBLY Removal

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