Drive Mode Select Switch Circuit [12/2019 - 10/2022]: Procedure

1. Check for DTCs.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022]

   Result

   Result	Proceed to
   CAN communication system DTCs are not output.	A
   CAN communication system DTCs are output.	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022] 

Result: 

A 

See step  2

1. Turn the engine switch off.
2. Disconnect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Drive Mode Select Switch (No. 1 Pattern Select Switch Assembly))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P3-5 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Inspect drive mode select switch (No. 1 pattern select switch assembly).

   UA80E: Refer to INSPECTION [12/2019 - 10/2022]

   UA80F: Refer to INSPECTION [12/2019 - 10/2022]

   OK

   Drive mode select switch (No. 1 pattern select switch assembly) is normal.

   Result

   Result	Proceed to
   Drive mode select switch (No. 1 pattern select switch assembly) is normal.	A
   Drive mode select switch (No. 1 pattern select switch assembly) is abnormal.	B

Result: 

B 

REPLACE NO. 1 PATTERN SELECT SWITCH ASSEMBLY 

UA80E: Refer to REMOVAL [12/2019 - 10/2022]

UA80F: Refer to REMOVAL [12/2019 - 10/2022]

Result: 

A 

See step  4

1. Connect the P3 drive mode select switch (No. 1 pattern select switch assembly) connector.
2. Disconnect the A28 ECM connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A28-55 (PWMS) - Body ground	SPORT mode switch being turned and held	Below 1 Ω
   A28-55 (PWMS) - Body ground	SPORT mode switch not turned	10 kΩ or higher
   A28-40 (SPCN) - Body ground	NORMAL mode switch being pushed and held	Below 1 Ω
   A28-40 (SPCN) - Body ground	NORMAL mode switch not pushed	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [12/2019 - 09/2020]  , or refer to  REMOVAL [09/2020 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR