Meter Illumination is Always Dark: Procedure

1. Check if a CAN communication DTC is output. Refer to DIAGNOSIS SYSTEM .

   Result

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

B → See step   9 

A: Go to next step 

1. Check if DTC B1244 is output. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   B1244 is not output.	A
   B1244 is output.	B

B → See step   7 

A: Go to next step 

1. Turn the engine switch on (IG).
2. Turn the light control switch to the tail, head, or AUTO position.
3. Cover the automatic light control sensor.
4. Check the heater control panel illumination.

   Result

   Result	Proceed to
   Heater control panel illumination does not operate normally.	A
   Heater control panel illumination operates normally.	B

   HINT: 

   Both the heater control panel and the combination meter assembly illumination dim according to the dimmer signal. Therefore, when only the meter illumination is always dark, there may be a malfunction in the combination meter assembly.

B → See step   6 

A: Go to next step 

1. Turn the engine switch on (IG).
2. Turn the light control switch to the AUTO position.
3. Cover the automatic light control sensor.
4. Check the taillights and low beam headlights.

   OK

   The taillights and low beam headlights come on.

5. Uncover the automatic light control sensor.
6. Check the low beam headlights and taillights.

   OK

   The taillights and low beam headlights go off.

   Result

   Result	Proceed to
   Automatic light control system operates normally.	A
   Automatic light control system does not operate normally.	B

B → See step   8 

A: Go to next step 

1. Replace the main body ECU (multiplex network body ECU) with a new or a normal one. Refer to REMOVAL .

   OK

   The operation of the combination meter assembly returns to normal.

   HINT: 

   The meter CPU 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 CPU because of a malfunction in the main body ECU (multiplex network body ECU).

NG → See step   6 

OK → END