DTC P0748: Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1): Procedure

1. Remove the TCM from the transaxle.
   Fig 1: Inspecting Transmission Wire (SL1)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   14 (SL1+) - 13 (SL1-)	20°C (68°F)	5.0 to 5.6 Ω
   14 (SL1+) - Body ground	Always	10 kΩ or higher
   13 (SL1-) - Body ground	Always	10 kΩ or higher
   14 (SL1+) - All other terminals except 13 (SL1-)	Always	10 kΩ or higher
   13 (SL1-) - All other terminals except 14 (SL1+)	Always	10 kΩ or higher

   Result

   Result	Proceed to
   OK	B
   NG	A

B → See step   3 

A: Go to next step 

1. Remove shift solenoid valve SL1.
   Fig 2: Identifying Shift Solenoid Valve SL1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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. Connect a battery positive (+) lead with a 21 W bulb to terminal 2 and a negative (-) lead to terminal 1 of the solenoid valve connector. Then check that the valve moves and makes an operating sound.

   OK

   Valve moves and makes an operating sound.

NG → See step   4 

OK → See step   5