Headup Display Malfunction [09/2014 - 10/2015]: 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

Result: 

B 

See step  4

Result: 

A 

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: 

NG 

REPLACE HEAD UP 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 connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P1-10 (SW2) - N7-10 (ILD)	Always	Below 1 Ω
   P1-9 (SW1) - N7-12 (ILU)	Always	Below 1 Ω
   P1-16 (E) - N7-6 (CH)	Always	Below 1 Ω
   P1-4 (ES) - Body ground	Always	Below 1 Ω
   P1-10 (SW2) - Body ground	Always	10 kΩ or higher
   P1-9 (SW1) - Body ground	Always	10 kΩ or higher
   P1-16 (E) - Body ground	Always	10 kΩ or higher

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
   P1-1 (IG) - Body ground	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
   P1-5 (ACC) - Body ground	Engine switch off	Below 1 V

Result: 

OK 

REPLACE COMBINATION METER MIRROR ECU 

(Refer to REMOVAL [09/2014 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Confirm DTC output (Refer to OPERATION CHECK [09/2014 - 10/2015] ).
   RESULT
   
   

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

Result: 

B 

See step  6

Result: 

C 

See step  8

Result: 

A 

See step  5

1. Temporarily replace the combination meter assembly with a new or normally functioning one (Refer to REMOVAL [09/2014 - ] ).

   Result

   The operation of the headup display returns to normal.

Result: 

OK 

END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE COMBINATION METER MIRROR ECU 

(Refer to REMOVAL [09/2014 - ] )

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
   P1-6 (TX-) - N40-33 (TX+)	Always	Below 1 Ω
   P1-7 (CS) - N40-34 (CS)	Always	Below 1 Ω
   P1-6 (TX-) - Body ground	Always	10 kΩ or higher
   P1-7 (CS) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Temporarily replace the combination meter assembly with a new or normally functioning one (Refer to REMOVAL [09/2014 - ] ).

   Result

   The operation of the headup display returns to normal.

Result: 

OK 

END (COMBINATION METER ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE COMBINATION METER MIRROR ECU 

(Refer to REMOVAL [09/2014 - ] )

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
   P1-12 (MPX1) - N68-7 (TX1+)	Always	Below 1 Ω
   P1-13 (MPX2) - N68-8 (TX1-)	Always	Below 1 Ω
   P1-12 (MPX1) - Body ground	Always	10 kΩ or higher
   P1-13 (MPX2) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Temporarily replace the multi-media module receiver assembly with a new or normally functioning one (Refer to REMOVAL [09/2014 - 09/2017] ).

   Result

   The operation of the headup display returns to normal.

Result: 

OK 

END (MULTI-MEDIA MODULE RECEIVER ASSEMBLY WAS DEFECTIVE) 

Result: 

NG 

REPLACE COMBINATION METER MIRROR ECU 

(Refer to REMOVAL [09/2014 - ] )