Meter Illumination does not Dim at Night [07/2015 - ]: Procedure

1. Check if CAN communication DTCs are output (Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] w/ Central Gateway ECU. Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] w/o Central Gateway ECU).

   Result

   Result	Proceed to
   CAN communication DTCs are not output.	A
   CAN communication DTCs are output (w/ Central Gateway ECU).	B
   CAN communication DTCs are output (w/o Central Gateway ECU).	C

Result:  B

B 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ] )

Result:  C

C 

GO TO CAN COMMUNICATION SYSTEM 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ] )

Result:  A

A 

See step  2

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 / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Illumination Rate Info	Illumination rate information/0.00 ms. to 2162.65 ms.	Value is output according to ambient light levels	-

   Result

   Result	Proceed to
   The output value changes according to the ambient light level.	A
   The output value does not change according to the ambient light level.	B

Result:  B

B 

CHECK CUSTOMIZE PARAMETER SETTING (SENSITIVITY) 

(Refer to CUSTOMIZE PARAMETERS [07/2015 - ] )

Result:  A

A 

See step  3

1. Replace the main body ECU (multiplex network body ECU) with a new or known good one (Refer to REMOVAL [07/2015 - ] ).

   OK

   The operation of the combination meter assembly returns to normal.

   HINT: 

   The meter ECU controls the meter illumination based on an auto dimmer signal from the main body ECU (multiplex network body ECU). If the meter does not dim when the light control switch is in the tail, head, or AUTO position at night, it may be for one of 2 reasons. The first reason is that the main body ECU (multiplex network body ECU) does not send an auto dimmer signal. The second is that the meter ECU does not dim the meter illumination even though the meter ECU receives an auto dimmer signal.

Result:  OK

OK 

END 

Result:  NG

NG 

REPLACE COMBINATION METER ASSEMBLY 

(Refer to REMOVAL [07/2015 - ] )