Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Linear Solenoid (C1298)

Toyota Corolla Cross (2022-2025) Service Manual / Drivetrain / Gf1a (transfer / 4wd / Awd) / Dynamic Torque Control Awd System / Linear Solenoid (C1298)

DESCRIPTION

Based on the signals from each sensor, the 4WD ECU assembly controls the transmitted torque of the 4WD linear solenoid (transmission coupling assembly). This enables driving force distribution to be optimized according to the driving conditions.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1298

Linear Solenoid

When all of the following continue for 1 second or more:

  • IG1 voltage is 9.5 V or more.
  • The current requested by the 4WD linear solenoid (transmission coupling assembly) is either 0 A, or is 0.8 A or more.
  • Open or short occurs in the linear solenoid circuit.
  • Wire harness or connector
  • 4WD linear solenoid (Transmission coupling assembly)
  • 4WD ECU assembly

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (4WD ECU ASSEMBLY - TRANSMISSION COUPLING ASSEMBLY)

(a) Disconnect the 4WD ECU assembly connector.

*a

Front view of wire harness connector

(to 4WD ECU Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O201-2 (SLC+) - O201-1 (SLC-)

20°C (68°F)

2.2 to 2.6 Ω

O201-2 (SLC+) - Body ground

Always

10 kΩ or higher

O201-1 (SLC-) - Body ground

Always

10 kΩ or higher
OK

REPLACE 4WD ECU ASSEMBLY

NG

2.

INSPECT TRANSMISSION COUPLING ASSEMBLY

(a) Disconnect the a1 4WD linear solenoid (transmission coupling assembly) connector.

*a

Component without harness connected

(4WD Linear Solenoid [Transmission Coupling Assembly])

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (BSF) - 2 (SLC)

20°C (68°F)

2.2 to 2.6 Ω

1 (BSF) - Body ground

Always

10 kΩ or higher

2 (SLC) - Body ground

Always

10 kΩ or higher
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR
NG

REPLACE TRANSMISSION COUPLING ASSEMBLY

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