DTC P0745-7F: Pressure Control Solenoid "A" Actuator Stuck Off [10/2014 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Transmission / Trouble Codes.

   Powertrain > Transmission > Trouble Codes 

5. Read the DTCs using the Techstream.

   Result

   Result	Proceed to
   Only DTC P0745-7F is output	A
   P0745-7F and other DTCs are output	B

   HINT: 

   If a solenoid is stuck OFF, DTCs for several solenoids including the malfunctioning solenoid will be detected.

Result: 

B 

See step  4

Result: 

A 

See step  2

1. Remove shift solenoid valve SL1.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	Shift Solenoid Valve SL1

   Refer to DISASSEMBLY [10/2014 - ]

2. 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

3. 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 (+) with a 21 W bulb → Terminal 1 Battery negative (-) → Terminal 2	Valve moves and makes an operating noise

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SHIFT SOLENOID VALVE SL1. Refer to  DISASSEMBLY [10/2014 - ] 

Result: 

OK 

See step  3

1. Check the transmission valve body assembly.

   Refer to REMOVAL [10/2014 - ]

   OK

   There is no foreign matter on each valve and they operate smoothly.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY. Refer to  REMOVAL [10/2014 - 09/2015]  , or refer to  REMOVAL [09/2015 - 05/2019]  , or refer to  REMOVAL [05/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY. Refer to  REMOVAL [10/2014 - ] 

1. Warm up the engine.
2. Turn the engine switch off.
3. Connect the Techstream to the DLC3.
4. Turn the engine switch on (IG).
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Transmission / Active Test.
7. According to the display on the Techstream, perform the Active Test.

   HINT: 

   Comparing the gear commanded by the Active Test with the actual gear enables confirmation of the problem.

   Refer to FAIL-SAFE CHART [10/2014 - ]

   Powertrain > Transmission > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Control the Shift Position	Operates the shift solenoid valves to allow gears to be selected manually.	1st/2nd/3rd/4th/5th/6th Start/Stop	Can be used to check the operation of the shift solenoid valves. Upshifts and downshifts should be performed consecutively. A 10-second interval is required between gear changes. Do not downshift at high speeds. Doing so will damage the automatic transaxle. [Vehicle Condition] 50 km/h (31 mph) or less

   Powertrain > Transmission > Active Test 

   Tester Display
   Control the Shift Position

   NOTE:

   • This test can be conducted when the vehicle is stopped.
   • When shifting gears using the Active Test function, do not operate the accelerator pedal for 2 seconds before and after shifting gears.

   HINT: 

   The gear commanded by the ECM is shown in the Data List / Shift Status display on the Techstream.

8. Check the vehicle speed and the gear when the engine speed is 1000 rpm.

   HINT: 

   Because the torque converter clutch has not engaged, it may be difficult to obtain the speeds specified in 4th, 5th, and 6th gear, however a difference of speed should still be evident following each gear change.

   Standard

   1st	2nd	3rd	4th	5th	6th
   8 to 12 km/h (5 to 7.5 mph)	15 to 19 km/h (9.3 to 11.8 mph)	21 to 25 km/h (13.0 to 15.5 mph)	31 to 35 km/h (19.3 to 21.7 mph)	44 to 48 km/h (27.3 to 29.8 mph)	52 to 56 km/h (32.3 to 34.8 mph)

9. Compare the ECM commanded gear and the actual gear.

   Result

   Actual Gear during Malfunction		ECM Commanded Gear						Proceed to
   		1st	2nd	3rd	4th	5th	6th
   Shift solenoid valve SL1	Stuck ON	1st	2nd	3rd	4th	4th	4th	A
   	Stuck OFF	N*1	N*1	N*1	N*1	5th	6th
   Shift solenoid valve SL2	Stuck ON	4th	4th	4th	4th	5th	6th	B
   	Stuck OFF	1st	2nd	3rd	1st	N*1	N*1
   Shift solenoid valve SL3	Stuck ON	2nd	2nd	3rd	4th	5th	6th	C
   	Stuck OFF	1st	1st	3rd	4th	5th	N*1
   Shift solenoid valve SL4	Stuck ON	3rd	3rd	3rd	4th	5th	5th	D
   	Stuck OFF	1st	2nd	1st	4th	N*1	6th
   Shift solenoid valve SLT	Stuck ON	N*2	N*2	N*2	N*2	N*2	N*2	E
   	Stuck OFF*3	1st	2nd	3rd	4th	5th	6th

   HINT: 

   • *1: Neutral
   • *2: If shift solenoid SLT is stuck on, the line pressure will be low. Therefore, the amount of torque that can be transmitted by each gear is lower than the normal limit. When the engine power exceeds this lowered limit, the engine speed will increase freely.
   • *3: When shift solenoid SLT is stuck off, gear shifting is normal.

Result: 

A 

See step  2

Result: 

B 

GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL2) PERFORMANCE DTC P0775-7F). Refer to  DTC P0775-7F: Pressure Control Solenoid "B" Actuator Stuck Off [10/2014 - ] 

Result: 

C 

GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL3) PERFORMANCE DTC P0795-7F). Refer to  DTC P0795-7F: Pressure Control Solenoid "C" Actuator Stuck Off [10/2014 - 05/2019]  , or refer to  DTC P0795-7F: Pressure Control Solenoid "C" Actuator Stuck Off [05/2019 - ] 

Result: 

D 

GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SL4) PERFORMANCE DTC P2807-7F). Refer to  DTC P2807-7F: Pressure Control Solenoid "G" Actuator Stuck Off [10/2014 - ] 

Result: 

E 

GO TO DTC CHART (RELATED SHIFT SOLENOID VALVE (SLT) PERFORMANCE DTC P2713-7F). Refer to  DTC P2713-7F: Pressure Control Solenoid "D" Actuator Stuck Off [10/2014 - ]