Toyota Yaris: Active Torque Split Awd System / 4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range (C05F51C)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Drivetrain / Gf1a (transfer / 4wd / Awd) / Active Torque Split Awd System / 4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range (C05F51C)

DESCRIPTION

When a malfunction has occurred in the AWD coupling solenoid system, the AWD ECU assembly stores DTC C05F51C.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

C05F51C

4WD/AWD Front/Rear Range Actuator Control Circuit Performance Circuit Voltage Out of Range

  • When the IG1 terminal voltage is 9.5 V or more and the current requested by the AWD linear solenoid is 0 A, a short circuit condition continues for 1 second or more
  • When the IG1 terminal voltage is 9.5 V or more and the current requested by the AWD linear solenoid is 0.8 A, an open circuit condition continues for 1 second or more
  • Wire harness or connector
  • AWD linear solenoid (Transmission coupling assembly)
  • AWD ECU assembly

Displayed

Yes

DTC Detection Conditions: C05F51C
 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

IG1 terminal voltage is 9.5 V or more and current requested by AWD linear solenoid is 0 A

-

IG1 terminal voltage is 9.5 V or more and current requested by AWD linear solenoid is 0.8 A

-

Malfunction Status

Short circuit

-

Open circuit

-

Detection Time

1 second or more

1 second or more

Number of Trips

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When the AWD ECU assembly is replaced, before removing the AWD ECU assembly, it is necessary to perform ECU Data Save to save the original AWD ECU assembly information.

    Click here

  • After performing repairs, clear the DTCs and check that the DTCs are not output again.

    Click here

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY))

(a) Turn the ignition switch off.

(b) Disconnect the O120 AWD ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O120-4 (SLC+) - O120-3 (SLC-)

20°C (68°F)

2.2 to 2.6 Ω

O120-4 (SLC+) - Body ground

Always

10 kΩ or higher

NG

GO TO STEP 3

OK

2.

CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY))

(a) Turn the ignition switch off.

(b) Disconnect the O120 AWD ECU assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O120-3 (SLC-) - Body ground

Always

Below 1 V

OK

REPLACE AWD ECU ASSEMBLY

NG

3.

CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY))

(a) Turn the ignition switch off.

(b) Disconnect the O119 and O120 AWD ECU assembly connector.

(c) Disconnect the U3 AWD linear solenoid (transmission coupling assembly) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O120-4 (SLC+) - U3-1 (BSF)

Always

Below 1 Ω

O120-3 (SLC-) - U3-2 (SLC)

Always

Below 1 Ω

O119-1 (GND) - Body ground

Always

Below 1 Ω

O120-4 (SLC+) or U3-1 (BSF) - Body ground

Always

10 kΩ or higher

O120-3 (SLC-) or U3-2 (SLC) - Body ground

Always

10 kΩ or higher

O120-4 (SLC+) or U3-1 (BSF) - O120-3 (SLC-) or U3-2 (SLC)

Always

10 kΩ or higher

O120-4 (SLC+) - O119-1 (GND)

Always

10 kΩ or higher

O120-3 (SLC-) - O119-1 (GND)

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (AWD ECU ASSEMBLY - AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY))

(a) Turn the ignition switch off.

(b) Disconnect the O120 AWD ECU assembly connector.

(c) Disconnect the U3 AWD linear solenoid (transmission coupling assembly) connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O120-3 (SLC-) or U3-2 (SLC) - Body ground

Always

Below 1 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT AWD LINEAR SOLENOID (TRANSMISSION COUPLING ASSEMBLY)

(a) Turn the ignition switch off.

(b) Disconnect the U3 AWD linear solenoid (transmission coupling assembly) connector.

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

Standard Resistance:

Standard Resistance

Condition

Specified Condition

U3-1 (BSF) - U3-2 (SLC)

20°C (68°F)

2.2 to 2.6 Ω

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE TRANSMISSION COUPLING ASSEMBLY

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