Meter Illumination is Always Dark [08/2014 - ]: Procedure

1. Check if a CAN communication DTC is output (See article. Refer to DIAGNOSIS SYSTEM [08/2014 - 08/2015] Refer to DIAGNOSIS SYSTEM [08/2015 - ] ).

   Result

   Result	Proceed to
   CAN communication DTC is not output.	A
   CAN communication DTC is output.	B

Result:  B

B 

GO TO CAN COMMUNICATION SYSTEM 

(See article. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2014 - ] )

Result:  A

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Check the values by referring to the table below.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Illumination Rate Info	Illumination rate information/0 ms. to 2162.65 ms.	Value output according to ambient light levels	-

   Result

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

Result:  B

B 

CHECK LIGHTING SETTING 

(See article. Refer to CUSTOMIZE PARAMETERS [08/2014 - ] )

Result:  A

A 

See step  3

1. Replace the main body ECU (multiplex network body ECU) with a new or a normal one (See article. Refer to REMOVAL [08/2014 - ] ).

   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). When the meter illumination is always dark (very dim), it may be due to the main body ECU (multiplex network body ECU) sending an auto dimmer signal to the meter ECU because of a malfunction in the main body ECU (multiplex network body ECU).

Result:  OK

OK 

END 

Result:  NG

NG 

REPLACE COMBINATION METER ASSEMBLY 

(See article. Refer to REMOVAL [08/2014 - ] )