Inspection Procedure

HINT

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

1. Push the personal light switches.
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 (Dim) Operation	Front and rear seat illumination	ON/OFF	-

   OK: Front and rear seat illumination comes on. 

   Result 

   RESULT CHART
   
   

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

   HINT

   If the rear seat illumination comes on normally, but the front seat illumination does not come on, there is an open circuit in the overhead junction block

A: REPLACE OVERHEAD JUNCTION BLOCK  (See REMOVAL  )

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 5, and then check that the seat illumination comes on

   OK: Seat illumination comes on. 

NG: REPLACE SPOT LIGHT ASSEMBLY  (See ROOM LIGHT  )

Fig 1: Identifying Spot Light Assembly (Rear Seat Illumination)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to next step 

1. Disconnect the R8 spot 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
   R8-5 (LILL) - R5-32 (LILL)	Always	Below 1 Ω
   R8-2 (ILLB) - Body ground	Always	10 kΩ or higher
   R8-5 (LILL) - Body ground	Always	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying Harness And Connector (Overhead Junction Block - Spot Light Assembly)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: REPLACE OVERHEAD JUNCTION BLOCK  (See REMOVAL  )

1. Disconnect the Q3 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
   Q3-3 (LGCY) - Body ground	Always	11 to 14 V

NG: Go to step 6 

Fig 3: Identifying Q3 Main Body ECU LH Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

1. Disconnect the Q3 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
   Q3-3 (LGCY) - R5-12 (CTY)	Always	Below 1 Ω
   Q3-3 (LGCY) - 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 OVERHEAD JUNCTION BLOCK  (See REMOVAL  )

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 OVERHEAD JUNCTION BLOCK  (See REMOVAL  )