Inspection Procedure

1. Operate the intelligent tester according to the steps on the display and select "DATA LIST".

   METER: 

   METER
   
   

   Item	Measurement Item/Range (Display)	Normal Condition	Diagnostic Note
   RHEOSTAT VOL	Light control rheostat / Min.: 0, Max.: 255	Light control rheostat switch is Dark (0) -> Bright (255)	-

   OK: Light brightness can be changed within the specified range by actual operation. 

NG : Go to step 2 

OK : REPLACE COMBINATION METER ASSEMBLY 

1. Remove the light control rheostat with connector still connected.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   LIGHT CONTROL RHEOSTAT
   
   

   Tester Connection	Condition	Specified Condition
   R6-1 (E) - R6-7 (RV)	Rheostat knob is in the MAX. position	8 to 12 kΩ
   R6-1 (E) - R6-7 (RV)	Rheostat knob is in the MIN. position.	Approx. 0 Ω

   Fig 1: Inspecting Light Control Rheostat

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE LIGHT CONTROL RHEOSTAT 

OK : GO TO NEXT STEP 

1. Disconnect the C9 and R6 connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   COMBINATION METER AND LIGHT CONTROL RHEOSTAT
   
   

   Tester Connection	Condition	Specified Condition
   C9-13 (RE) - R6-1 (E)	Always	Below 1 Ω
   C9-14 (TR) - R6-7 (RV)	Always	Below 1 Ω
   R6-7 (RV) - Body ground	Always	10 kΩ or higher
   R6-1 (E) - Body ground	Always	Below 1 Ω

   Fig 2: Checking Harness And Connector (Between Combination Meter And Light Control Rheostat)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : REPLACE COMBINATION METER ASSEMBLY