DTC P0973: Shift Solenoid "A" Control Circuit Low (Shift Solenoid Valve S1); DTC P0974: Shift Solenoid "A" Control Circuit High (Shift Solenoid Valve S1) [08/2015 - 08/2019]: Procedure

1. Disconnect the B32 transmission wire connector.

   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
   8 (S1) - Body ground	20°C (68°F)	11 to 15 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Transmission Wire)

Result: 

NG 

See step  3

Result: 

OK 

See step  2

1. Disconnect the B37 ECM connector.

   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
   B37-36 (S1) - Body ground	20°C (68°F)	11 to 15 Ω

   TEXT IN ILLUSTRATION
   
   

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

Result: 

OK 

REPLACE ECM 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

See step  3

Result: 

OK 

REPAIR OR REPLACE TRANSMISSION WIRE 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPLACE SHIFT SOLENOID VALVE S1 

(Refer to PROCEDURE - Step 6 )