Toyota Tacoma 2015-2018 Service Manual: Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) (P2759)

Toyota Tacoma 2015-2018 Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2tr-fe) / Torque Converter Clutch Pressure Control Solenoid Control Circuit Electrical (Shift Solenoid Valve SLU) (P2759)

DESCRIPTION

Refer to the system description for DTC P2757 (See page ).

DTC No.	DTC Detection Condition	Trouble Area
P2759	Open or short is detected in shift solenoid valve SLU circuit for 1 second 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 a shift solenoid valve SLU circuit is detected, the ECM determines there is a malfunction. The ECM will illuminate 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	Immediately
Sequence of operation	None

TYPICAL ENABLING CONDITIONS

All:

The monitor will run whenever the following DTCs are not stored	None
Ignition switch	ON
Starter	OFF

Condition (A):

Battery voltage

12 V or higher

Condition (B):

Battery voltage	10 V or higher, and below 12 V
Target current	Below 0.75 A

Condition (C):

Battery voltage	8 V or higher
Target current	0.25 A or higher

TYPICAL MALFUNCTION THRESHOLDS

One of the following conditions is met: Condition (A), (B) or (C)

Condition (A) and (B):

Output duty cycle

100% or more

Condition (C):

Output duty cycle

0% or less

COMPONENT OPERATING RANGE

Output duty cycle

More than 3%, and less than 100%

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Perform the universal trip to clear permanent DTCs (See page ).
Perform registration and/or initialization when parts related to the automatic transmission are replaced (See page ).

HINT:

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

Perform the Lock-up Function in Road Test (See page ).
Check for DTCs again (See page ).

PROCEDURE

1.	INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SLU)

(a) Disconnect the E1 transmission wire connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
21 (SLU+) - 22 (SLU-)	20°C (68°F)	5.0 to 5.6 Ω
21 (SLU+) - Body ground	Always	10 kΩ or higher
22 (SLU-) - Body ground	Always	10 kΩ or higher

Text in Illustration

*a	Component without harness connected (Transmission Wire)

GO TO STEP 3

2.	CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

(a) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E19-2 (SLU+) - E19-1 (SLU-)	20°C (68°F)	5.0 to 5.6 Ω
E19-2 (SLU+) - Body ground	Always	10 kΩ or higher
E19-1 (SLU-) - Body ground	Always	10 kΩ or higher

Text in Illustration

*a	Rear view of wire harness connector (to ECM)

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT SHIFT SOLENOID VALVE SLU

(a) Remove shift solenoid valve SLU (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 - 2	20°C (68°F)	5.0 to 5.6 Ω

OK:

Measurement Condition	Specified Condition
Battery positive (+) with a 21 W bulb → Terminal 1 Battery negative (-) → Terminal 2	Valve moves and makes an operating noise

Text in Illustration

*1	Shift Solenoid Valve SLU

REPLACE TRANSMISSION WIRE

REPLACE SHIFT SOLENOID VALVE SLU

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DESCRIPTION Changing from 1st to 6th is performed by the ECM turning shift solenoid valves SL1, SL2, SL3 and SL4 on and off. If an open or short circuit occurs in any of the shift solenoid valves ...

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