Toyota Yaris: Vehicle Stability Control System / Steering Angle Sensor Supply Voltage Circuit Circuit Short to Ground or Open (C14FE14)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System / Steering Angle Sensor Supply Voltage Circuit Circuit Short to Ground or Open (C14FE14)

DESCRIPTION

This DTC is stored when the skid control ECU (brake actuator assembly) receives a power supply malfunction signal from the steering sensor.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

C14FE14

Steering Angle Sensor Supply Voltage Circuit Circuit Short to Ground or Open

When the +BS terminal voltage is from 9.5 to 17.4 V, a steering sensor power supply malfunction signal is received from the steering sensor.

  • Steering sensor
  • Wire harness and connector

Brake

WIRING DIAGRAM

Refer to DTC C05262A.

Click here

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake > Clear DTCs

(b) Turn the ignition switch off.

NEXT

2.

RECONFIRM DTC

(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.

(b) Check if the same DTC is output.

Chassis > Brake > Trouble Codes

Result

Proceed to

DTC C14FE14 is not output.

A

DTC C14FE14 is output.

B

A

USE SIMULATION METHOD TO CHECK

B

3.

CHECK HARNESS AND CONNECTOR (IGR TERMINAL)

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

OK:

The connector is securely connected.

(b) Disconnect the H39 steering sensor connector.

*a

Front view of wire harness connector

(to Steering Sensor)

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

H39-9 (IGR) - Body ground

Ignition switch ON

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (BAT TERMINAL)

(a) Turn the ignition switch off.

*a

Front view of wire harness connector

(to Steering Sensor)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

H39-4 (BAT) - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (ESS TERMINAL)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H39-6 (ESS) - Body ground

1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal

Below 1 Ω

OK

REPLACE STEERING SENSOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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