Headup Display Malfunction: Procedure

1. Check the symptom of the headup display.
   RESULT
   
   

   Result	Proceed to
   Headup display does not operate at all.	A
   Headup display does not change.	B

B → See step   4 

A: Go to next step 

1. Remove the headup display switch assembly. Refer to REMOVAL [12/2011 - ] .
2. Inspect the headup display switch assembly. Refer to INSPECTION [12/2011 - ] .

NG → See step   10 

OK: Go to next step 

1. Disconnect the P1 combination meter mirror ECU connector.
2. Disconnect the N7 headup display switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P1-15 (SW2) - N7-10 (ILD)	Always	Below 1 Ω
   P1-14 (SW1) - N7-12 (ILU)
   P1-16 (E) - N7-6 (CH)
   P1-4 (ES) - Body ground
   P1-15 (SW2) - Body ground	Always	10 kΩ or higher
   P1-14 (SW1) - Body ground
   P1-16 (E) - Body ground

4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   P1-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   	Engine switch off	Below 1 V
   P1-2 (B) - Body ground	Always	11 to 14 V
   P1-5 (ACC) - Body ground	Engine switch on (ACC)	11 to 14 V
   	Engine switch off	Below 1 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11 

1. Confirm DTC output. Refer to OPERATION CHECK [12/2011 - ] .
   RESULT
   
   

   Result	Proceed to
   DTC is not output.	A
   DTC (01, 02) is output.	B
   DTC (03, 04) is output.	C

B → See step   6 

C → See step   8 

A: Go to next step 

1. Temporarily replace the combination meter assembly with a new or normally functioning one. Refer to REMOVAL [12/2011 - ] .

   Result

   The operation of the headup display returns to normal.

NG → See step   11 

OK → END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

1. Disconnect the P1 combination meter mirror ECU connector.
2. Disconnect the N40 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P1-8 (TX-) - N40-33 (TX+)	Always	Below 1 Ω
   P1-9 (CS) - N40-34 (CS)
   P1-8 (TX-) - Body ground	Always	10 kΩ or higher
   P1-9 (CS) - Body ground

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the combination meter assembly with a new or normally functioning one. Refer to REMOVAL [12/2011 - ] .

   Result

   The operation of the headup display returns to normal.

NG → See step   11 

OK → END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

1. Disconnect the P1 combination meter mirror ECU connector.
2. Disconnect the N68 multi-media module receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P1-11 (MPX1) - N68-24 (TX2+)	Always	Below 1 Ω
   P1-12 (MPX2) - N68-25 (TX2-)
   P1-11 (MPX1) - Body ground	Always	10 kΩ or higher
   P1-12 (MPX2) - Body ground

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the multi-media module receiver assembly with a new or normally functioning one. Refer to REMOVAL [12/2011 - ] .

   Result

   The operation of the headup display returns to normal.

NG → See step   11 

OK → END (MULTI-MEDIA MODULE RECEIVER ASSEMBLY WAS DEFECTIVE)