Steering Pad Switch Circuit [09/2017 - 05/2019]: 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: System Select / Can Bus Check.

   CAN Bus Check 

   Result

   Result	Proceed to
   All of the ECUs and sensors that are currently connected to the CAN communication system are displayed	A
   None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - 05/2019] 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: System Select / Health Check.
5. Check DTCs.
6. Turn the engine switch off.

   Result

   Result	Proceed to
   No DTCs are output.	A
   DTCs are output.	B

Result: 

B 

GO TO  DIAGNOSTIC TROUBLE CODE CHART [09/2017 - 05/2019] 

Result: 

A 

See step  3

1. Remove the steering pad switch assembly.

   Refer to REMOVAL [09/2017 - ]

2. Inspect the steering pad switch assembly.

   Refer to INSPECTION [09/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  REMOVAL [09/2017 - ] 

Result: 

OK 

See step  4

1. Remove the spiral cable sub-assembly.

   Refer to REMOVAL [09/2017 - 05/2019]

2. Inspect the spiral cable sub-assembly.

   Refer to INSPECTION [09/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [09/2017 - 05/2019] 

Result: 

OK 

See step  5

1. Disconnect the I4 spiral cable sub-assembly connector.
2. Disconnect the I159 driving support ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   I4-12 (DIST) - I159-23 (SPSW)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   I4-12 (DIST) or I159-23 (SPSW) - Body ground	Always	10 kΩ or higher

4. Connect the I159 driving support ECU assembly connector.
5. Connect the I4 spiral cable sub-assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - DRIVING SUPPORT ECU ASSEMBLY) 

Result: 

OK 

See step  6

1. Disconnect the I4 spiral cable sub-assembly connector.
2. Disconnect the A35 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   I4-2 (ECC) - A35-41 (ECCS)	Always	Below 1 Ω

4. Reconnect the I4 spiral cable sub-assembly connector.
5. Reconnect the A35 ECM connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2017 - 05/2019] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM)