DTC P0798: Pressure Control Solenoid "C" Electrical (Shift Solenoid Valve SL3) [12/2012 - ]: Procedure

1. Disconnect the ECM connector.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   *a	Front view of wire harness connector (to ECM)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B77-11 (SL3+) - B77-10 (SL3-)	20°C (68°F)	5.0 to 5.6 Ω
   B77-11 (SL3+) - Body ground and other terminals	Always	10 kΩ or higher
   B77-10 (SL3-) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [12/2012 - ] 

Result: 

NG 

See step  2

1. Disconnect the B78 wiring harness connector.
2. Disconnect the B77 ECM connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   B78-19 (SL3+) - B77-11 (SL3+)	Always	Below 1 Ω
   B78-18 (SL3-) - B77-10 (SL3-)	Always	Below 1 Ω
   B78-19 (SL3+) or B77-11 (SL3+) - Body ground and other terminals	Always	10 kΩ or higher
   B78-18 (SL3-) or B77-10 (SL3-) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the wiring harness connector.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   *a	Component without harness connected (Transmission Wire)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A-16 (SL3+) - A-15 (SL3-)	20°C (68°F)	5.0 to 5.6 Ω
   A-16 (SL3+) - Body ground	Always	10 kΩ or higher
   A-15 (SL3-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE WIRING HARNESS CONNECTOR. Refer to  REMOVAL [12/2012 - 08/2017]  or  REMOVAL [08/2017 - ] 

Result: 

NG 

See step  4

1. Remove shift solenoid valve SL3.

   Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

   *1	Shift Solenoid Valve SL3

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: 

OK 

REPLACE TRANSMISSION WIRE. Refer to  REMOVAL [12/2012 - ] 

Result: 

NG 

REPLACE SHIFT SOLENOID VALVE SL3. Refer to  DISASSEMBLY [12/2012 - ]