Main Switch Circuit [07/2020 - ]: 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: Body Electrical / Head Up Display / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Head Up Display > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Main Switch	No. 3 combination switch assembly (headup display switch) status	OFF or ON	OFF: Switch released ON: Switch pushed	-

   Body Electrical > Head Up Display > Data List 

   Tester Display
   Main Switch

   OK

   No. 3 combination switch assembly (headup display switch) condition displayed on the Techstream changes with the actual switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [07/2020 - 05/2023]  , or refer to  REMOVAL [05/2023 - ] 

Result: 

NG 

See step  2

1. Remove the No. 3 combination switch assembly (headup display switch).

   Refer to REMOVAL [07/2020 - ]

2. Inspect the No. 3 combination switch assembly (headup display switch).

   Refer to INSPECTION [07/2020 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 3 COMBINATION SWITCH ASSEMBLY (HEADUP DISPLAY SWITCH). Refer to  REMOVAL [07/2020 - ] 

Result: 

OK 

See step  3

1. Disconnect the P80 meter mirror sub-assembly connector.
2. Disconnect the P63 No. 3 combination switch assembly (headup display switch) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P80-9 (SW1) - P63-5 (ILU)	Always	Below 1 Ω
   P80-16 (E) - P63-15 (CH)	Always	Below 1 Ω
   P80-9 (SW1) or P63-5 (ILU) - Other terminals and body ground	Always	10 kΩ or higher
   P80-16 (E) or P63-15 (CH) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [07/2020 - 05/2023]  , or refer to  REMOVAL [05/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR