C1777

SUSPENSION CONTROL: ADAPTIVE VARIABLE SUSPENSION SYSTEM: C1777: Steering Angle Sensor Circuit
C1777 - Steering Angle Sensor Circuit

DESCRIPTION

- The steering angle sensor detects the amount and direction of steering wheel movement and inputs these details to the absorber control ECU via CAN communication.

- The fail-safe function prohibits roll posture control if any malfunction occurs in the steering angle sensor circuit Fail-Safe Chart.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
- Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.
- When C1774 is output, inspect and repair the trouble areas indicated by C1774 first C1774.

PROCEDURE

1. CHECK DTC

(a) Clear the DTC Adaptive Variable Suspension System.

(b) Turn the engine switch off.

(c) Turn the engine switch on (IG) again and check that no CAN communication system DTC is output.

(d) Start the engine.

(e) Drive the vehicle and turn the steering wheel to the right and left at the speed of 24 mph (35 km/h) to check that a DTC is output Adaptive Variable Suspension System, Vehicle Stability Control System (2GR-FSE) and Electronically Controlled Brake System (1UR-FSE)).

Result:





C -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE

B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (STEERING ANGLE SENSOR INPUT VOLTAGE)

(a) Disconnect the steering angle sensor connector.





(b) Turn the engine switch on (IG).

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

Voltage:





(d) Turn the engine switch off.

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

Resistance:





Result:





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A -- REPLACE STEERING ANGLE SENSOR