Automatic Transmission (Diagnostic Codes & Circuit Tests): Other Lexus GX J150

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

ALL

TYPICAL MALFUNCTION THRESHOLDS

1. One of the following conditions is met: Condition (A), (B) or (C) Condition (A) When 2 or more of the following signals are input at the same time P switch ON N switch ON NSW switch ON R switch ON D switch ON Condition (B) When the shift lever is in S, one of the following conditions is met P switch ON N switch ON NSW switch ON R switch ON Condition (C) All of the following conditions are met P switch OFF N switch OFF NSW switch OFF R switch OFF D switch OFF

COMPONENT OPERATING RANGE

Scheme 453

ALL

CONDITION (A)

CONDITION (B)

When either condition below is met: Condition (A) or (B)

CONDITION (A)

CONDITION (B)

CONDITION (A)

CONDITION (B)

PROCEDURE

1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0711) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs using the Techstream. RESULT Result Proceed to Only P0711 is output A P0711 and other DTCs are output B HINT: If any other codes besides P0711 are output, perform troubleshooting for those DTCs first. B --> See step 4 A: Go to next step
2. CHECK TRANSMISSION FLUID LEVEL Check the transmission fluid level. Refer to «ADJUSTMENT»(ref-524256-S25715515122013012800000) . OK Automatic transmission fluid level is correct. NG --> See step 5 OK --> See step 3
3. REPAIR OR REPLACE TRANSMISSION WIRE. Refer to «REMOVAL»(ref-524256-S15629588202013012800000)
4. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-524128-S24287833502013012800000)
5. ADD FLUID. Refer to «ADJUSTMENT»(ref-524256-S25715515122013012800000)

All

1. Battery voltage 8 V or higher Engine switch On (IG) Starter OFF

P0712: Range check (Low resistance)

1. The monitor will run whenever the following DTCs are not present None

P0713: Range check (High resistance)

1. One of the following conditions is met: Condition (A) or (B) Condition (A) The monitor will run whenever the following DTCs are not present P0115, P0117, P0118 (ECT sensor circuit) P0097, P0098, P0110, P0112, P0113 (IAT sensor circuit) Engine coolant temperature or intake air temperature at engine start -29.375°C (-20.875°F) or less Time after engine start 332 seconds or more Condition (B) The monitor will run whenever the following DTCs are not present P0115, P0117, P0118 (ECT sensor circuit) P0097, P0098, P0110, P0112, P0113 (IAT sensor circuit) Engine coolant temperature and intake air temperature at engine start Higher than -29.375°C (-20.875°F) Time after engine start 10 seconds or more

P0712: RANGE CHECK (LOW RESISTANCE)

P0713: RANGE CHECK (HIGH RESISTANCE)

Scheme 454

Scheme 455

Scheme 456

ALL

HINT

*: Following conditions are met

CONDITION (A)

CONDITION (B)

Both of the following conditions are met: Condition (A) and (B)

CONDITION (A)

CONDITION (B)

Scheme 457

ALL

HINT

*: Following conditions are met

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

OFF MALFUNCTION (C)

ON MALFUNCTION (A)

ON MALFUNCTION (B)

[OFF malfunction]

1. Both of the following conditions are met: OFF malfunction (A) and OFF malfunction (B) or (C)

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

OFF MALFUNCTION (C)

[ON malfunction]

1. Both of the following conditions are met: ON malfunction (A) and (B)
2. 2 detections are necessary per driving cycle
3. 1st detection: temporary flag ON
4. 2nd detection: pending fault code ON

ON MALFUNCTION (A)

ON MALFUNCTION (B)

ALL

HINT

*: Following conditions are met

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

ON MALFUNCTION (A)

ON MALFUNCTION (B)

OFF malfunction is detected when OFF malfunction (A) and (B) are detected.

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

ON Malfunction is detected when ON malfunction (A) and (B) are detected.

ON MALFUNCTION (A)

ON MALFUNCTION (B)

ALL

HINT

*: Following conditions are met

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

ON MALFUNCTION (A)

ON MALFUNCTION (B)

ON MALFUNCTION (C)

[OFF malfunction]

1. Both of the following conditions are met: OFF malfunctions (A) and (B)

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

[ON malfunction]

1. One of the following conditions is met: ON malfunctions (A), (B) or (C)

ON MALFUNCTION (A)

ON MALFUNCTION (B)

ON MALFUNCTION (C)

ALL

HINT

*: Following conditions are met

P0766 OFF MALFUNCTION (A) AND P0776 ON MALFUNCTION (A)

P0766 OFF MALFUNCTION (B) AND P0776 ON MALFUNCTION (B)

[OFF malfunction]

1. Both of the following conditions are met: OFF malfunction (A) and (B)

P0766 OFF MALFUNCTION (A)

P0766 OFF MALFUNCTION (B)

[ON malfunction]

1. Both of the following conditions are met: ON malfunction (A) and (B)

P0776 ON MALFUNCTION (A)

P0776 ON MALFUNCTION (B)

Scheme 458

ALL

HINT

*: Following conditions are met

CONDITION (A)

CONDITION (B)

CONDITION (C)

CONDITION (D)

1. Both of the following conditions are met: Condition (A), and Condition (B), (C) or (D)

CONDITION (A)

CONDITION (B)

CONDITION (C)

CONDITION (D)

1. CHECK DTC OUTPUT (IN ADDITION TO DTC P0781) Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Read the DTCs using the Techstream. RESULT Result Proceed to Only P0781 is output A P0781 and other DTCs are output B HINT: If any other codes besides P0781 are output, perform troubleshooting for those DTCs first. B --> See step 5 A: Go to next step
2. PERFORM ACTIVE TEST USING TECHSTREAM (RUNNING TEST) WARNING: This test should always be performed with at least 2 people. NOTE: Perform the test while the ATF temperature is between 50 and 80°C (122 and 176°F). Perform the test with the A/C turned off. HINT: Using the Techstream 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 Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Active Test. According to the display on the Techstream, perform the Active Test. HINT: While driving, the shift position can be forcibly changed with the Techstream. ENGINE AND ECT Tester Display Test Part Control Range Diagnostic Note Control the Shift Position Operate shift solenoid valves and set each shift position Press "-->" button: Shift up Press "<--" button: Shift down Possible to check operation of the shift solenoid valves. [Vehicle Condition] 50 km/h (30 mph) or less HINT: This test can be conducted when the vehicle speed is 50 km/h (30 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 Techstream. Gear positions in the event of a solenoid valve mechanical problem: Tester gear shift command 1st 2nd 3rd 4th 5th 6th Actual gear position under malfunction 1st 1st 3rd 3rd N* N* N*: Neutral OK Gear position changes in accordance with the Techstream command. NG --> See step 6 OK: Go to next step
3. PERFORM ACTIVE TEST USING TECHSTREAM (SHIFT SOLENOID VALVE SLT) See step 3 NG --> See step 7 OK: Go to next step
4. CLEAR DTC AND PERFORM RUNNING TEST See step 4 NG --> See step 8 OK --> END
5. GO TO DTC CHART. Refer to «DIAGNOSTIC TROUBLE CODE CHART»(ref-524128-S24287833502013012800000)
6. REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY. Refer to «REMOVAL»(ref-524256-S19236801412013012800000)
7. REPLACE SHIFT SOLENOID VALVE SLT. Refer to «DISASSEMBLY - Step 3»(ref-524256-S02781877062013012800000)
8. REPAIR OR REPLACE AUTOMATIC TRANSMISSION ASSEMBLY. Refer to «REMOVAL»(ref-524256-S08579335952013012800000)

Scheme 459

Shift solenoid valve SLT controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and vehicle speed sensor. The ECM adjusts the current to shift solenoid valve SLT to control the hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.

ALL

HINT

*: Following conditions are met

[P0894: ON malfunction]

1. When either condition below is met: ON malfunction (A) or (B)

ON MALFUNCTION (A)

ON MALFUNCTION (B)

[P2714: ON malfunction]

1. One of the following conditions is met: ON malfunction (A), (B), (C), (D), (E), (F), (G) or (H)

ON MALFUNCTION (A)

ON MALFUNCTION (B)

ON MALFUNCTION (C)

ON MALFUNCTION (D)

ON MALFUNCTION (E)

ON MALFUNCTION (F)

ON MALFUNCTION (G)

ON MALFUNCTION (H)

ALL

P0973: RANGE CHECK (LOW RESISTANCE)

P0974: RANGE CHECK (HIGH RESISTANCE)

P0973: RANGE CHECK (LOW RESISTANCE)

P0974: RANGE CHECK (HIGH RESISTANCE)

Scheme 460

ALL

P0976: RANGE CHECK (LOW RESISTANCE)

P0977: RANGE CHECK (HIGH RESISTANCE)

P0976: RANGE CHECK (LOW RESISTANCE)

P0977: RANGE CHECK (HIGH RESISTANCE)

Scheme 461

ALL

P0979: RANGE CHECK (LOW RESISTANCE)

P0980: RANGE CHECK (HIGH RESISTANCE)

P0979: RANGE CHECK (LOW RESISTANCE)

P0980: RANGE CHECK (HIGH RESISTANCE)

Scheme 462

ALL

P0982: RANGE CHECK (LOW RESISTANCE)

P0983: RANGE CHECK (HIGH RESISTANCE)

P0982: RANGE CHECK (LOW RESISTANCE)

P0983: RANGE CHECK (HIGH RESISTANCE)

Scheme 463

ALL

P0985: RANGE CHECK (LOW RESISTANCE)

P0986: RANGE CHECK (HIGH RESISTANCE)

P0985: RANGE CHECK (LOW RESISTANCE)

P0986: RANGE CHECK (HIGH RESISTANCE)

Scheme 464

Scheme 465

ALL

HINT

*: Following conditions are met

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

ON MALFUNCTION

[OFF malfunction]

1. Both of the following conditions are met: OFF malfunction (A) and (B)

OFF MALFUNCTION (A)

OFF MALFUNCTION (B)

[ON malfunction]

1. 2 detections are necessary per driving cycle
2. 1st detection: temporary flag ON
3. 2nd detection: pending fault code ON
4. Vehicle speed must be under 10 km/h (6.2 mph) once before 2nd detection.

ON MALFUNCTION

Scheme 466

ALL

ON MALFUNCTION (A)

ON MALFUNCTION (B)

Both of the following conditions are met: ON malfunction (A) and (B)

ON MALFUNCTION (A)

ON MALFUNCTION (B)

Scheme 467