Inspection Procedure

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

Inspect Courtesy Lamp Switch (Driver Side Door)
1. Inspect front door courtesy lamp switch continuity.
  1. Check that there is continuity between terminal 1 and body ground, when switch is operated.
  Standard:
  
  ON: (When Shaft Is Pressed): No Continuity
  
  OFF: (When Shaft Is Not Pressed): Continuity
1. NG : Replace Courtesy Lamp Switch
2. OK : Go to Next Step

Inspect Drive Side Junction Block (SIG)

Insert the ignition key to the key cylinder.

Measure the voltage between terminal 1C-2 of driver side junction block and body ground.

Standard:

DRIVE SIDE JUNCTION BLOCK(SIG) INSPECTION

Ignition Key	Specified Condition
Insert	10 - 14 V
Uninsert	Below 1V

NG : Repair Or Replace Harness Or Connector
OK : Check And Replace Drive Side Junction Block