Inspection Procedure

1. Cover the automatic light control sensor with a cloth to prevent it from sensing.
2. Connect the Techstream to the DLC3.
3. Engine switch on (IG).
4. Turn the tester ON.
5. Enter following menus: Body Electrical / Combination Meter / Active Test.
6. Check the operation by referring to the table below.

   Combination Meter: 

   TESTER DISPLAY REFERENCE CHART
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicat. ECD ON	Cluster glass	Cluster glass becomes tinted when the active test is ON	Confirm that the vehicle is stopped, engine idling

   OK: 

   Cluster glass becomes tinted when the active test is ON. 

NG :  Go to step  5

OK : Go to next step 

1. Connect the Techstream to the DLC3.
2. Engine switch on (IG).
3. Turn the tester ON.
4. Enter following menus: Body Electrical / Combination Meter / Data List.
5. Check the values by referring to the table below.

   Combination Meter: 

   TESTER DISPLAY REFERENCE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   ECD Sunlight sensor	ECO sunlight sensor input value/ Min.: 0, Max.: 255	Between 50 to 70	Confirm that the vehicle is stopped, engine idling
   		Between "light is not shined on automatic light control sensor" value and 195*
   HINT: *: The value changes according to the intensity of the light.

OK : REPLACE COMBINATION METER 

NG : Go to next step 

1. Disconnect the K31 connector.
2. Disconnect the V34 automatic light control sensor harness connector.
3. Measure the resistance of the wire side connectors.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   K31-36 - V34-5	Always	Below 1 Ω
   K31-16 - V34-3	Always	Below 1 Ω
   K31-18 - V34-1	Always	Below 1 Ω
   K31-16 - V34-5	Always	10 kΩ or higher
   K31-16 - V34-1	Always	10 kΩ or higher
   K31-16 - Body ground	Always	10 kΩ or higher
   K31-18 - Body ground	Always	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 1: Checking Harness And Connector (Combination Meter - Automatic Light Control Sensor)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : Go to next step 

1. Connect the K31 connector to the combination meter.
2. Disconnect the V34 automatic light control sensor connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   V34-3 - V34-5	Always	275 to 325 Ω

4. Measure the voltage of the wire harness side connector.
   Fig 2: Inspecting Combination Meter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   V34-1 - V34-5	Engine switch on (IG)	4.6 to 5.4 V

NG : REPLACE COMBINATION METER 

OK : REPLACE AUTOMATIC LIGHT CONTROL SENSOR 

1. Disconnect the connectors labeled A, B and C in the illustration.
2. Measure the voltage of the wire harness side connector on the combination meter.

   Standard voltage 

   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   A-1 - A-3	60 seconds after performing ACTIVE TEST "Indicate ECD ON"	1.22 to 1.32 V
   B-1 - B-3	60 seconds after performing ACTIVE TEST "Indicate ECD ON"	1.22 to 1.32 V
   C-1 - C-3	60 seconds after performing ACTIVE TEST "Indicate ECD ON"	1.22 to 1.32 V

NG : REPLACE COMBINATION METER 

Fig 3: Inspecting Combination Meter

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE COMBINATION METER GLASS