Front Door Courtesy Switch Circuit [10/2014 - ]: Procedure

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 / Main Body / Data List.
5. Read the Data List according to 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: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [10/2014 - ] )

Result: 

NG 

See step  2

1. Remove the front door courtesy light switch assembly (Refer to REMOVAL [10/2014 - ] ).
2. Inspect the front door courtesy light switch assembly (Refer to INSPECTION [10/2014 - ] ).

   OK

   Front door courtesy light switch assembly is normal.

   Result

   Result	Proceed to
   OK (for LH)	A
   OK (for RH)	B
   NG	C

Result: 

B 

See step  5

Result: 

C 

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

A 

See step  3

1. Disconnect the 3C instrument panel junction block assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J5-1 - 3C-15	Always	Below 1 Ω
   J5-1 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the instrument panel junction block assembly (Refer to REMOVAL [10/2014 - ] ).
2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3C-15 - MB-2 (FLCY)	Always	Below 1 Ω

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [10/2014 - ] )

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

1. Disconnect the F2 courtesy light assembly RH connector.
2. Disconnect the D6 main body ECU (multiplex network body ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K5-1 - D6-19 (FRCY)	Always	Below 1 Ω
   K5-1 - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(Refer to REMOVAL [10/2014 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR