Toyota CH-R Service Manual: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (P2759)

Toyota CH-R Service Manual / K114 Cvt / Continuously Variable Transaxle System / Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (P2759)

DESCRIPTION

The ECM uses the shift solenoid valve SLU to perform forward and reverse clutch control or lock-up clutch control.

*1

Spool Valve

*2

Sleeve

*3

Solenoid Coil

-

-

*a

Hydraulic Pressure

*b

Current Flow to Solenoid

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P2759

Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical

While the vehicle is driven, there is an open or short in the shift solenoid valve SLU circuit for 1 second or more (1 trip detection logic).

  • Wire harness or connector
  • Continuously variable transaxle assembly (Shift solenoid valve SLU)
  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

This DTC indicates an open or short in the shift solenoid valve SLU circuit. If there is an open or short in the shift solenoid valve SLU circuit, the ECM detects the malfunction, illuminates the MIL and stores this DTC.

MONITOR STRATEGY

Related DTCs

P2759: Torque Converter Clutch Pressure Control Solenoid (Shift solenoid valve SLU) / Range check

Required sensors/Components

Continuously variable transaxle assembly

(Shift solenoid valve SLU)

Frequency of operation

Continuous

Duration Conditions

1 second

MIL operation

Immediately

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

Solenoid current cut status

Not cut

Battery voltage

8 V or more

Time after Battery voltage 8 V or more

0.5 seconds or more

Write Inhibit

permit

Time after Write status forbiddance to permit

0.5 seconds or more

Ignition switch

ON

Time after Ignition switch OFF to ON

0.5 seconds or more

Starter

OFF

Time after Starter ON to OFF

0.5 seconds or more

Condition (A):

One of the following conditions is met:

-

a. Battery voltage

12 V or more

b. All of the following conditions are met:

-

Battery voltage

10 V or more and less than 12 V

Target current

Less than 0.75 A

Condition (B):

Target current

0.25 A or more

TYPICAL MALFUNCTION THRESHOLDS

Condition (A):

Output duty cycle

100% or more

Condition (B):

Output duty cycle

0% or less

COMPONENT OPERATING RANGE

Output duty cycle

More than 0% and less than 100%

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Perform initialization after replacing any parts related to the continuously variable transaxle system.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

  • Perform the universal trip to clear permanent DTCs.

    Click here

HINT:

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Drive the vehicle and confirm the lock-up on and off conditions according to Road Test.

    Click here

  2. Check for DTCs again.

    Click here

PROCEDURE

1.

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)

(a) Disconnect the C40 transmission wire connector.

*a

Component without harness connected

(Transmission Wire)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4 (SLU+) - 11 (SLU-)

20°C (68°F)

5.0 to 5.6 Ω

4 (SLU+) - Body ground and other terminals

Always

10 kΩ or higher

11 (SLU-) - Body ground and other terminals

Always

10 kΩ or higher

NG

GO TO STEP 4

OK

2.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the ECM connector.

*a

Front view of wire harness connector

(to ECM)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C63-43 (SLU+) - C63-42 (SLU-)

20°C (68°F)

5.0 to 5.6 Ω

C63-43 (SLU+) - Body ground and other terminals

Always

10 kΩ or higher

C63-42 (SLU-) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)

OK

3.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM INITIALIZATION

4.

REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

(a) Replace the continuously variable transaxle assembly.

  • When Not Using the Engine Support Bridge

    Click here

  • When Using the Engine Support Bridge

    Click here

NEXT

PERFORM INITIALIZATION

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