Toyota Yaris: Active Torque Split Awd System / Linear Solenoid Power Supply System Circuit Voltage Out of Range (C120C1C)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Drivetrain / Gf1a (transfer / 4wd / Awd) / Active Torque Split Awd System / Linear Solenoid Power Supply System Circuit Voltage Out of Range (C120C1C)

DESCRIPTION

When a malfunction has occurred in the linear solenoid power source system, the AWD ECU assembly stores DTC C120C1C.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

C120C1C

Linear Solenoid Power Supply System Circuit Voltage Out of Range

When the IG1 terminal voltage is 9.5 V or more and less than 17.0 V, the BSLC terminal voltage is less than 9.5 V for 1 second.

  • Wire harness or connector
  • AWD ECU assembly

Displayed

Yes

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • 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 (BSLC TERMINAL)

(a) Turn the ignition switch off.

(b) Disconnect the O119 AWD ECU assembly connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

O119-2 (BSLC) - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK HARNESS AND CONNECTOR (GND TERMINAL)

(a) Turn the ignition switch off.

(b) Disconnect the O119 AWD ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O119-1 (GND) - Body ground

Always

Below 1 Ω

OK

REPLACE AWD ECU ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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    Categories

    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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