Steering Pad Switch Circuit [11/2017 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: System Select / 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 [11/2017 - ] 

Result: 

A 

See step  2

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

   Result

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

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2017 - ] 

Result: 

A 

See step  3

1. Remove the steering pad switch assembly.

   Refer to REMOVAL [12/2015 - ]

2. Inspect the steering pad switch assembly.

   Refer to INSPECTION [12/2015 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  COMPONENTS [12/2015 - ] 

Result: 

OK 

See step  4

1. Remove the spiral cable with sensor sub-assembly.

   Refer to REMOVAL [12/2015 - ]

2. Inspect the spiral cable with sensor sub-assembly.

   Refer to INSPECTION [12/2015 - ]

   Result

   Result	Proceed to
   OK (w/ Steering Heater)	A
   OK (w/o Steering Heater)	B
   NG	C

Result: 

B 

See step  6

Result: 

C 

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY. Refer to  COMPONENTS [12/2015 - ] 

Result: 

A 

See step  5

1. Disconnect the D149 spiral cable with sensor sub-assembly connector.
2. Disconnect the A80 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
   D149-12 (DIST) - A80-23 (SPSW)	Always	Below 1 Ω
   D149-2 (ECC) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D149-12 (DIST) or A80-23 (SPSW) - Body ground	Always	10 kΩ or higher

4. Connect the A80 driving support ECU assembly connector.
5. Connect the D149 spiral cable with sensor sub-assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the D21 spiral cable with sensor sub-assembly connector.
2. Disconnect the A80 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
   D21-4 (DIST) - A80-23 (SPSW)	Always	Below 1 Ω
   D21-2 (ECC) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D21-4 (DIST) or A80-23 (SPSW) - Body ground	Always	10 kΩ or higher

4. Connect the A80 driving support ECU assembly connector.
5. Connect the D21 spiral cable with sensor sub-assembly connector.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR