Interior Light Power Source Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT ROOF CONSOLE BOX ASSEMBLY
1. Remove the roof console box assembly. Refer to REMOVAL [08/2013 - ] .
2. Inspect the roof console box assembly. Refer to INSPECTION [08/2013 - ] .
  OK
  
  Roof console box assembly is normal.
NG → See step 5

OK: Go to next step

CHECK HARNESS AND CONNECTOR (DOME FUSE - ROOF CONSOLE BOX ASSEMBLY)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
T10-4 (+B1) - Body ground	Power switch off	11 to 14 V
T10-5 (+B5) - Body ground	Power switch off	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ROOF CONSOLE BOX ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Disconnect the H11 main body ECU (multiplex network body ECU) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
T10-7 (CILL) - H11-2 (DOMR)	Always	Below 1 Ω
T10-7 (CILL) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 4

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]
REPLACE ROOF CONSOLE BOX ASSEMBLY. Refer to REMOVAL [08/2013 - ]