Main Switch Circuit [09/2017 - ]: 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	Main switch	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Brightness Up Switch	Brightness up switch	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Brightness Down Switch	Brightness down switch	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Projection Position Up Switch	Projection position up switch	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Projection Position Down Switch	Projection position down switch	OFF or ON	OFF: Switch released ON: Switch pushed	-
   Display Change Switch	Display change switch	OFF or ON	OFF: Switch released ON: Switch pushed	-

   OK

   Headup display switch assembly condition displayed on the Techstream changes with the actual switch operation.

   Body Electrical > Head Up Display > Data List 

   Tester Display
   Main Switch
   Brightness Up Switch
   Brightness Down Switch
   Projection Position Up Switch
   Projection Position Down Switch
   Display Change Switch

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [09/2017 - 05/2019]  , or refer to  REMOVAL [05/2019 - ] 

Result: 

NG 

See step  2

1. Remove the headup display switch assembly.

   Refer to REMOVAL [10/2014 - ]

2. Inspect the headup display switch assembly.

   Refer to INSPECTION [10/2014 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HEADUP DISPLAY SWITCH ASSEMBLY. Refer to  REMOVAL [10/2014 - ] 

Result: 

OK 

See step  3

1. Disconnect the J5 meter mirror sub-assembly connector.
2. Disconnect the I70 headup display switch assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J5-9(SW1) - I70-12(ILU)	Always	Below 1 Ω
   J5-10(SW2) - I70-10(ILD)	Always	Below 1 Ω
   J5-16(E) - I70-6(CH)	Always	Below 1 Ω
   J5-9(SW1) or I70-12(ILU) - Body ground	Always	10 kΩ or higher
   J5-10(SW2) or I70-10(ILD) - Body ground	Always	10 kΩ or higher
   J5-16(E) or I70-6(CH) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE METER MIRROR SUB-ASSEMBLY. Refer to  REMOVAL [09/2017 - 05/2019]  , or refer to  REMOVAL [05/2019 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR