Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL) (P2769,P2770)

Toyota Tacoma 2015-2018 Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2tr-fe) / Short in Torque Converter Clutch Solenoid Circuit (Shift Solenoid Valve SL) (P2769,P2770)

DESCRIPTION

Shift solenoid valve SL is turned on and off by signals from the ECM to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.

DTC No.

DTC Detection Condition

Trouble Area

P2769

ECM detects a short in the shift solenoid valve SL circuit when the shift solenoid valve SL is operated (2 trip detection logic).

  • Short in shift solenoid valve SL circuit
  • Shift solenoid valve SL
  • ECM

P2770

ECM detects an open in the shift solenoid valve SL circuit when the shift solenoid valve SL is not operated (2 trip detection logic).

  • Open in shift solenoid valve SL circuit
  • Shift solenoid valve SL
  • ECM

Fail-safe function:

If the ECM detects a malfunction, it turns shift solenoid valve SL off.

MONITOR DESCRIPTION

Based on the signals from the throttle position sensor, the air flow meter and the crankshaft position sensor, the ECM sends a signal to shift solenoid valve SL to regulate the hydraulic pressure and provide smoother torque converter engagement. Shift solenoid valve SL responds to commands from the ECM. The valve controls the lock-up relay valve to perform the torque-converter lock-up function. If the ECM detects an open or short in the shift solenoid valve SL circuit, it will illuminate the MIL and store the DTC.

MONITOR STRATEGY

Related DTCs

P2769: Shift solenoid valve SL/Range check

P2770: Shift solenoid valve SL/Range check

Required sensors/Components

Shift solenoid valve SL

Frequency of operation

Continuous

Duration

1 time

MIL operation

2 driving cycles

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

Command to shift solenoid valve SL

ON

P2769:

Time after command to solenoid OFF to ON

0.008 sec. or more

P2770:

Time after command to solenoid ON to OFF

0.008 sec. or more

TYPICAL MALFUNCTION THRESHOLDS

P2769:

Solenoid terminal voltage level

Low

P2770:

Solenoid terminal voltage level

High

COMPONENT OPERATING RANGE

Solenoid terminal voltage level (Command to solenoid ON)

High

Solenoid terminal voltage level (Command to solenoid OFF)

Low

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

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

  1. Perform the Lock-up Function in Road Test (See page Turn the ignition switch off. ).*1
  2. Turn the ignition switch off.
  3. Perform step (*1) again.
  4. Check for DTCs again (See page ).

PROCEDURE

1.

INSPECT TRANSMISSION WIRE (SHIFT SOLENOID VALVE SL)

(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

1 (SL) - Body ground

20°C (68°F)

11 to 15 Ω

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 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E18-12 (SL) - Body ground

20°C (68°F)

11 to 15 Ω

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 SL

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Shift solenoid valve SL connector terminal - Shift solenoid valve SL body

20°C (68°F)

11 to 15 Ω

(c) Apply 12 V battery voltage to the shift solenoid valve and check that the valve moves and makes an operating noise.

OK:

Measurement Condition

Specified Condition

  • Battery positive (+) → Shift solenoid valve SL connector
  • Battery negative (-) → Shift solenoid valve SL body

Valve moves and makes an operating noise

Text in Illustration

*1

Shift Solenoid Valve SL

OK

REPLACE TRANSMISSION WIRE

NG

REPLACE SHIFT SOLENOID VALVE SL

Transmission Fluid Temperature Sensor "B" Circuit Low Input (P2742,P2743)
DESCRIPTION The No. 2 ATF temperature sensor is installed in the transmission valve body assembly. If the ECM detects an abnormally high ATF temperature near this sensor, it illuminates the warn ...

Transmission Range Sensor Circuit Malfunction (PRNDL Input) (P0705)
DESCRIPTION The park/neutral position switch detects the shift lever position and sends signals to the ECM. DTC No. DTC Detection Condition Trouble Area ...

Other materials:

Parts Location
PARTS LOCATION ILLUSTRATION *A for Vacuum Brake Booster *B for Hydraulic Brake Booster *1 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) *2 SKID CONTROL ECU (MASTER CYLINDER SOLENOID) *3 ...

Components
COMPONENTS ILLUSTRATION *A for Double Cab *B w/o Woofer *C w/ Woofer - - *1 LUGGAGE COMPARTMENT SIDE TRAY RH - - ILLUSTRATION *A ...

Neutral Position Switch
Components COMPONENTS ILLUSTRATION *1 NEUTRAL POSITION SWITCH *2 GASKET N*m (kgf*cm, ft.*lbf): Specified torque ● Non-reusable part Installation INSTALLATION PROCEDURE 1. INSTALL NEUTR ...

© 2011-2018 Copyright www.ttguide.net