Inspection Procedure

HINT.

The personal lights and interior lights share the same power source Therefore, if none of them come on, inspect the power source circuit first

1. Push the switches for the personal lights
2. Check that the personal lights come on

   OK: Personal lights come on. 

NG: Go to step  7

OK: Go to next step 

1. Connect the Techstream to the DLC3
2. Turn the engine switch on (IG)
3. Turn the Techstream on
4. Enter the following menus Body Electrical / Body No 3 / Active Test
5. Check the operation

   Body No. 3 (Main Body ECU LH) 

   DIAGNOSTIC NOTE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Interior Light Operation	Interior lights	ON/OFF	-

   OK: The front and rear interior lights come on. 

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Front interior light does not come on	A
   Rear interior light does not come on	B
   Neither front nor rear interior light comes on	C
   OK	D

A: REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) 

B: Go to step 3 

C: Go to step  5

D: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

1. Remove the spot light assembly.
2. Connect a positive (+) lead from the battery to terminal 2 and a negative (-) lead to terminal 4, and then check that the interior light comes on.

   OK: The interior light comes on. 

Fig 1: Identifying Spot Light Assembly (Rear Interior Light)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SPOT LIGHT ASSEMBLY  (See ROOM LIGHT  )

OK: Go to next step 

1. Disconnect the R8 rear dome light assembly connector
2. Disconnect the R5 overhead junction block connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   R8-2 (ILLB) - R5-4 (ILLB)	Always	Below 1 Ω
   R8-4 (RILL) - R5-33 (RILL)	Always	Below 1 Ω
   R8-2 (ILLB) - Body ground	Always	10 kΩ or higher
   R8-4 (RILL) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Harness And Connector (Overhead Junction Block - Spot Light Assembly)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) 

1. Disconnect the Q1 main body ECU LH connector
2. Measure the voltage according to the value(s) in the table below

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   Q1-2 (ILE) - Body ground	Always	11 to 14 V

Fig 3: Identifying Q1 Main Body ECU LH Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 6 

OK: REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) 

1. Disconnect the Q1 main body ECU LH connector.
2. Disconnect the R5 overhead junction block connector.
3. Measure the resistance according to the value(s) in the table below

   Standard Resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   Q1-2 (ILE) - R5-13 (ILL)	Always	Below 1 Ω
   Q1-2 (ILE) - Body ground	Always	10 kΩ or higher

Fig 4: Identifying Harness And Connector (Main Body ECU LH - Overhead Junction Block)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH) 

1. Disconnect the R5 overhead junction block connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   R5-1 (+B1) - Body ground	Always	11 to 14 V

Fig 5: Identifying R5 Overhead Junction Block Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)