Headup Display Switch Circuit [10/2015 - ]: 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
   
   

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Main Switch	Headup display 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

   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

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER MIRROR ECU. Refer to  REMOVAL [09/2014 - ] 

Result: 

NG 

See step  2

1. Remove the headup display switch assembly.

   Refer to REMOVAL [09/2014 - ]

2. Inspect the headup display switch assembly.

   Refer to INSPECTION [09/2014 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HEADUP DISPLAY SWITCH ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

Result: 

OK 

See step  3

1. Disconnect the P1 combination meter mirror ECU connector.
2. Disconnect the N7 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
   P1-9 (SW1) - N7-12 (ILU)	Always	Below 1 Ω
   P1-10 (SW2) - N7-10 (ILD)	Always	Below 1 Ω
   P1-16 (E) - N7-6 (CH)	Always	Below 1 Ω
   P1-9 (SW1) or N7-12 (ILU) - Body ground	Always	10 kΩ or higher
   P1-10 (SW2) or N7-10 (ILD) - Body ground	Always	10 kΩ or higher
   P1-16 (E) or N7-6 (CH) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER MIRROR ECU. Refer to  REMOVAL [09/2014 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR