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 (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.





WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 C1232.

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 DTC (CAN COMMUNICATION SYSTEM)

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK TERMINAL VOLTAGE (IG)

(a) Disconnect the G40 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.

3. CHECK HARNESS AND CONNECTOR (GND TERMINAL)

(a) Disconnect the G40 yaw rate and acceleration sensor connector.

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

Standard Resistance:





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

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

4. RECONFIRM DTC

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

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

(c) Start the engine.

(d) Perform a road test.

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

Result





B -- REPLACE YAW RATE AND ACCELERATION SENSOR Removal

A -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting