Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - AB60F AUTOMATIC TRANSMISSION / TRANSAXLE

DESCRIPTION

MONITOR DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC OUTPUT (IN ADDITION TO DTCS P0766 AND P0776)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SHIFT SOLENOID VALVE SLT)

INSPECT SHIFT SOLENOID VALVE S4

INSPECT SHIFT SOLENOID VALVE SL2

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

DTC P0766 Shift Solenoid "D" Performance (Shift Solenoid Valve S4)

DTC P0776 Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2)

DESCRIPTION

The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th, 5th or 6th gear).


Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems with the shift solenoid valves, valve body or automatic transmission (clutch, brake or gear, etc.).

DTC CodeDTC Detection ConditionTrouble Area
P0766A shift solenoid valve S4 stuck OFF malfunction or brake control valve malfunction*1:
Shifting to 5th and 6th gears is impossible.
The ECM determines there is a malfunction when the following conditions are both met (2 trip detection logic*2, 1 trip detection logic*3).
(a) When the ECM directs the transmission to switch to 5th gear, the actual gear is shifted to 4th.
(b) When the ECM directs the transmission to switch to 6th gear, the actual gear is shifted to 4th.
Shift solenoid valve S4 remains closed
Shift solenoid valve SLT remains open or closed
Valve body is blocked (brake control valve)
Automatic transmission (clutch, brake or gear, etc.)
P0776A shift solenoid valve SL2 stuck ON malfunction or brake control valve malfunction*1:
Shifting to 5th and 6th gears is impossible.
The ECM determines there is a malfunction when the following conditions are both met (2 trip detection logic).
(a) When the ECM directs the transmission to switch to 5th gear, the actual gear is shifted to 4th.
(b) When the ECM directs the transmission to switch to 6th gear, the actual gear is shifted to 4th.
Shift solenoid valve SL2 remains open
Shift solenoid valve SLT remains open or closed
Valve body is blocked (brake control valve)
Automatic transmission (clutch, brake or gear, etc.)
  • HINT:
Gear positions in the event of a solenoid valve mechanical problem:
ECM gear shift command1st2nd3rd4th5th6th
*1: Actual gear position under malfunction1st2nd3rd4th4th4th
Gear position during fail-safe operation:
If any malfunction is detected, the ECM changes into the fail-safe mode to shift into the gear positions as shown in the table below.
Gear position under normal conditions1st2nd3rd4th5th6th
*1: Actual gear position under fail-safe mode1st2nd3rd3rd3rd3rd
*2: w/ OBD
*3: w/o OBD

MONITOR DESCRIPTION

This DTC indicates "stuck OFF malfunction" of the shift solenoid valve S4, "stuck ON malfunction" of the shift solenoid valve SL2, or brake control valve malfunction. The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". When the gear position commanded by the ECM and the actual gear position are not same, the ECM illuminates the MIL and stores the DTC.


INSPECTION PROCEDURE

ACTIVE TEST
  • HINT:
  • Using the intelligent tester to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

Warm up the engine.

Turn the ignition switch off.

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the intelligent tester on.

Enter the following menus: Powertrain / ECT / Active Test.

According to the display on the tester, perform the Active Test.

  • HINT:
  • While driving, the shift position can be forcibly changed with the intelligent tester.
  • Comparing the shift position commanded by the Active Test with the actual shift position enables you to confirm the problem ().
ECT
Tester DisplayTest PartControl RangeDiagnostic Note
Control the Shift PositionOperate shift solenoid valve and set each shift position
Press "→" button: Shift up
Press "←" button: Shift down
It is possible to check the operation of the shift solenoid valves.
[Vehicle Condition]
The vehicle speed is 50 km/h (31 mph) or less.
  • HINT:
This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
The 4th to 5th and 5th to 6th up-shifts must be performed with the accelerator pedal released.
The 6th to 5th and 5th to 4th down-shifts must be performed with the accelerator pedal released.
Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively.
The shift position commanded by the ECM is shown in the Data List display on the tester.
The shift solenoid valve SL2 turns ON/OFF normally when the shift lever is in D.
ECM gear shift command1st2nd3rd4th5th6th
Shift solenoid valve S4OFFOFFOFFOFFONON
Shift solenoid valve SL2ONONONONOFFOFF
1.CHECK DTC OUTPUT (IN ADDITION TO DTCS P0766 AND P0776)

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the intelligent tester on.

Enter the following menus: Powertrain / ECT / Trouble Codes.

Read the DTCs using the tester.

Result
ResultProceed to
P0766 and/or P0776 is outputA
P0766, P0776 and other DTCs are outputB
  • HINT:
  • If any other codes besides P0766 and P0776 are output, perform troubleshooting for those DTCs first.
B
GO TO DTC CHART ()
A
2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SHIFT SOLENOID VALVE SLT)
  • NOTICE:
Perform the test at the normal operating ATF temperature: 50 to 80°C (122 to 176°F).
Be careful to prevent SST hose from interfering with the exhaust pipe.
Perform the test with the A/C turned off.
  • HINT:
  • Using the intelligent tester to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.
Dtc P0766 Shift Solenoid D Performance (Shift Solenoid Valve S4). AB60F AUTOMATIC TRANSMISSION / TRANSAXLE. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the test plug on the transmission case center right side and connect SST.

  • SST
  • 09992-00095(09992-00231,09992-00271)

Connect the intelligent tester to the DLC3.

Start the engine and warm it up.

Measure the line pressure with SST.

Turn the intelligent tester on.

Enter the following menus: Powertrain / ECT / Active Test.

According to the display on the tester, perform the Active Test.

Measure the line pressure.

ECT
Tester DisplayTest PartControl RangeDiagnostic Note
Activate the Solenoid (SLT)*Operate shift solenoid valve SLT and raise line pressureON or OFF
  • HINT:
OFF: Line pressure up (when Active Test "Activate the Solenoid (SLT)" is performed, ECM commands shift solenoid valve SLT to turn OFF)
ON: No action (normal operation)
[Vehicle Condition]
The vehicle is stopped.
The engine is idling.
  • HINT:
  • *: Activate the Solenoid (SLT) in the Active Test is performed to check the line pressure changes by connecting SST to the automatic transmission, which is used in the Hydraulic Test () as well. Note that the pressure values in the Active Test and hydraulic test are different.
  • OK:
  • The line pressure changes as specified when performing the Active Test.
NG
REPLACE SHIFT SOLENOID VALVE SLT ()
OK
3.INSPECT SHIFT SOLENOID VALVE S4
Dtc P0766 Shift Solenoid D Performance (Shift Solenoid Valve S4). AB60F AUTOMATIC TRANSMISSION / TRANSAXLE. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the shift solenoid valve S4.

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    Shift solenoid valve S4 connector terminal - Shift solenoid valve S4 body20°C (68°F) 11 to 15 Ω

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

  • OK:
  • Measurement ConditionSpecified Condition
    Battery positive (+) → Shift solenoid valve S4 connector
    Battery negative (-) → Shift solenoid valve S4 body
    		Valve moves and makes an operating noise
NG
REPLACE SHIFT SOLENOID VALVE S4 ()
OK
4.INSPECT SHIFT SOLENOID VALVE SL2
Dtc P0766 Shift Solenoid D Performance (Shift Solenoid Valve S4). AB60F AUTOMATIC TRANSMISSION / TRANSAXLE. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the shift solenoid valve SL2.

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    1 - 220°C (68°F) 5.0 to 5.6 Ω

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

  • OK:
  • Measurement ConditionSpecified Condition
    Battery positive (+) with a 21 W bulb → Terminal 1
    Battery negative (-) → Terminal 2
    		Valve moves and makes an operating noise
NG
REPLACE SHIFT SOLENOID VALVE SL2 ()
OK
5.INSPECT TRANSMISSION VALVE BODY ASSEMBLY

Check the transmission valve body assembly ().

  • OK:
  • There are no foreign objects on any valve.
NG
REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY ()
OK
REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY ()
AB60F AUTOMATIC TRANSMISSION / TRANSAXLE
Land Cruiser URJ200 URJ202 GRJ200 VDJ200
AUTOMATIC TRANSMISSION SYSTEM for 1VD-FTV