Operating Light Control Rheostat does not Change Light Brightness [06/2020 - 10/2022]: Procedure

1. Using the GTS, read the Data List.

   Refer to DATA LIST / ACTIVE TEST [06/2020 - 10/2022]

   Body Electrical > Combination Meter > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Meter Day Mode Switch	Light control rheostat (tail cancel switch) signal	OFF or ON	OFF: Light control rheostat (tail cancel switch) off ON: Light control rheostat (tail cancel switch) on	-
   Rheostat value	Light control rheostat input signal	Min.: 0.00%, Max.: 100.02% or Unset	Light control rheostat dark (0.00%) → bright (100.02%)	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Meter Day Mode Switch
   Rheostat value

   OK

   Light control rheostat condition displayed on the GTS changes with the actual switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2020 - 10/2022] 

Result: 

NG 

See step  2

Refer to INSPECTION [06/2020 - ]

Result

Result: 

NG 

REPLACE LIGHT CONTROL RHEOSTAT. Refer to  REMOVAL [06/2020 - ] 

Result: 

OK 

See step  3

1. Disconnect the G18 combination meter assembly connector.
2. Disconnect the G108 light control rheostat connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G18-34 (SW1) - G108-5 (T)	Always	Below 1 Ω
   G18-17 (TC) - G108-3 (TC)	Always	Below 1 Ω
   G18-16 (SW2) - G108-4 (TR)	Always	Below 1 Ω
   G18-11 (SW3) - G108-2 (E)	Always	Below 1 Ω
   G18-34 (SW1) or G108-5 (T) - Body ground	Always	10 kΩ or higher
   G18-17 (TC) or G108-3 (TC) - Body ground	Always	10 kΩ or higher
   G18-16 (SW2) or G108-4 (TR) - Body ground	Always	10 kΩ or higher
   G18-11 (SW3) or G108-2 (E) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [06/2020 - 10/2022] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR