Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - A750F AUTOMATIC TRANSMISSION / TRANSAXLE
CHECK DTC OUTPUT (IN ADDITION TO DTC P0751)
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SHIFT SOLENOID VALVE SLT)
INSPECT SHIFT SOLENOID VALVE S1
INSPECT TRANSMISSION VALVE BODY ASSEMBLY
DTC P0751 Shift Solenoid "A" Performance (Shift Solenoid Valve S1)
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 or 5th 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 Code | DTC Detection Condition | Trouble Area |
| P0751 | The gear required by the ECM does not match the actual gear when driving (2 trip detection logic*1, 1 trip detection logic*2). | Shift solenoid valve S1 remains open or closed Shift solenoid valve SLT remains open or closed Valve body is blocked Automatic transmission (clutch, brake or gear, etc.) |
MONITOR DESCRIPTION
This DTC indicates a stuck ON malfunction or stuck OFF malfunction of the shift solenoid valve S1.
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 the 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 engine switch off.
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Powertrain / Engine and 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 ().
| Tester Display | Test Part | Control Range | Diagnostic Note |
| Control the Shift Position | Operate 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:
| ECM gear shift command | 1st | 2nd | 3rd | 4th | 5th |
| Shift solenoid valve S1 | ON | ON | OFF | OFF | OFF |
| 1.CHECK DTC OUTPUT (IN ADDITION TO DTC P0751) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Powertrain / Engine and ECT / DTC.
Read the DTCs using the tester.
| Result | Proceed to |
| Only P0751 is output | A |
| P0751 and other DTCs are output | B |
- HINT:
- If any other codes besides P0751 are output, perform troubleshooting for those DTCs first.
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| A | |
| 2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SHIFT SOLENOID VALVE SLT) |
- NOTICE:
- 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.
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 / Engine and ECT / Active Test.
According to the display on the tester, perform the Active Test.
Measure the line pressure.
| Tester Display | Test Part | Control Range | Diagnostic Note |
| Activate the Solenoid (SLT)* | Operate shift solenoid valve SLT and raise line pressure | ON or OFF
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.
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| OK | |
| 3.INSPECT SHIFT SOLENOID VALVE S1 |
Remove the shift solenoid valve S1.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition Shift solenoid valve S1 connector terminal - Shift solenoid valve S1 body 20°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 Condition Specified Condition Battery positive (+) → Shift solenoid valve S1 connectorBattery negative (-) → Shift solenoid valve S1 bodyValve moves and makes an operating noise
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| OK | |
| 4.INSPECT TRANSMISSION VALVE BODY ASSEMBLY |
Check the transmission valve body assembly ().
- OK:
- There are no foreign objects on any valve.
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| OK | ||
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