Toyota 4Runner manuals

Toyota 4Runner: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) (P2759)

Toyota 4Runner Service Manual / Drivetrain / A750e Automatic Transmission / Transaxle / Automatic Transmission System / Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) (P2759)

DESCRIPTION

The amount of current flow to the solenoid is controlled by the duty ratio* of the ECM output signal. During the lock-up operation, if the duty ratio increases, the lock-up hydraulic pressure increases.


HINT:

*: The duty ratio is the ratio of the current ON time (A) to the total of the current ON and OFF time (A + B). Duty Ratio (%) = A / (A + B) x 100

DTC Code

DTC Detection Condition

Trouble Area

P2759

Open or short is detected in the shift solenoid valve SLU circuit for 1 sec. or more while driving (1-trip detection logic).

  • Open or short in shift solenoid valve SLU circuit
  • Shift solenoid valve SLU
  • ECM

MONITOR DESCRIPTION

When an open or short in the shift solenoid valve (SLU) circuit is detected, the ECM determines there is a malfunction. The ECM will turn on the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs

P2759: Shift solenoid valve SLU/Range check

Required sensors/Components

Shift solenoid valve SLU

Frequency of operation

Continuous

Duration

1 sec.

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever the following DTCs are not stored

None

Battery voltage

8 V or higher

Ignition switch

ON

Starter

OFF

Condition (A)

Solenoid current cut status

Not cut

Battery voltage

11 V or higher

Target duty cycle

19% or more

Condition (B)

Target duty cycle

100%

TYPICAL MALFUNCTION THRESHOLDS

Solenoid status from solenoid driver MIC

Failure

COMPONENT OPERATING RANGE

Output signal duty

Less than 100%

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).


PROCEDURE

1.

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)

(a) Disconnect the B32 transmission wire connector.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

13 (SLU+) - 5 (SLU-)

20°C (68°F)

5.0 to 5.6 Ω

13 (SLU+) - Body ground

Always

10 kΩ or higher

5 (SLU-) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Component without harness connected

(Transmission Wire)


NG

GO TO STEP 3

OK

2.

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the B37 ECM connector.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B37-33 (SLU+) - B37-32 (SLU-)

20°C (68°F)

5.0 to 5.6 Ω

B37-33 (SLU+) - Body ground

Always

10 kΩ or higher

B37-32 (SLU-) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Rear view of wire harness connector

(to ECM)


OK

REPLACE ECM


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.

INSPECT SHIFT SOLENOID VALVE SLU



OK

REPAIR OR REPLACE TRANSMISSION WIRE


NG

REPLACE SHIFT SOLENOID VALVE SLU

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