Front Door Courtesy Switch Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the display on the Techstream.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   FR Door Courtesy SW	Front door courtesy light switch RH signal/ON or OFF	ON: Front door RH open OFF: Front door RH closed	-
   FL Door Courtesy SW	Front door courtesy light switch LH signal/ON or OFF	ON: Front door LH open OFF: Front door LH closed	-

   OK

   Normal conditions listed above are displayed.

   Result

   Result	Proceed to
   OK	A
   Front door courtesy light switch LH or RH does not operate	B

B → See step   2 

A → See step   6 

1. Remove the front door courtesy light switch assembly. Refer to REMOVAL .
2. Inspect the front door courtesy light switch assembly. Refer to INSPECTION .

   OK

   Front door courtesy light switch assembly is normal.

NG → See step   5 

OK: Go to next step 

1. for Front LH
   1. Disconnect the 2D instrument panel junction block assembly connector.
   2. Disconnect the R6 front door courtesy light switch assembly LH connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      2D-35 - R6-1	Always	Below 1 Ω
      2D-35 - Body ground	Always	10 kΩ or higher

2. for Front RH
   1. Disconnect the 2D instrument panel junction block assembly connector.
   2. Disconnect the S5 front door courtesy light switch assembly RH connector.
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      2D-36 - S5-1	Always	Below 1 Ω
      2D-36 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. for Front LH
   Fig 1: Inspecting Instrument Panel Junction Block Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Remove the instrument panel junction block assembly. Refer to REMOVAL .
   2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to REMOVAL .
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      2D-35 - MB-2 (FLCY)	Always	Below 1 Ω

      TEXT IN ILLUSTRATION
      
      

      *a	Component without harness connected (Instrument Panel Junction Block Assembly)

2. for Front RH
   Fig 2: Inspecting Instrument Panel Junction Block Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Remove the instrument panel junction block assembly. Refer to REMOVAL .
   2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly. Refer to REMOVAL .
   3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      2D-36 - MB-4 (FRCY)	Always	Below 1 Ω

      TEXT IN ILLUSTRATION
      
      

      *a	Component without harness connected (Instrument Panel Junction Block Assembly)

NG → See step   8 

OK → See step   7