Rear Door Courtesy Switch Circuit [02/2014 - ]: 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 Data List according to the display on the Techstream.

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   RR Door Courtesy SW	Rear door courtesy light switch assembly RH signal	ON or OFF	ON: Rear door RH open OFF: Rear door RH closed	-
   RL Door Courtesy SW	Rear door courtesy light switch assembly LH signal	ON or OFF	ON: Rear door LH open OFF: Rear door LH closed	-

   Body Electrical > Main Body > Data List 

   Tester Display
   RR Door Courtesy SW
   RL Door Courtesy SW

   OK

   Normal conditions listed above are displayed.

   Result

   Result	Proceed to
   OK	A
   RR Door Courtesy SW is not normal	B
   RL Door Courtesy SW is not normal	C

Result:  1

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [02/2014 - ]  

Result:  3

C 

See step  5

Result:  2

B 

See step  2

1. Remove the rear door courtesy light switch assembly RH.

   Refer to REMOVAL [02/2014 - ]

2. Inspect the rear door courtesy light switch assembly RH.

   Refer to INSPECTION [02/2014 - ]

   Result

   Proceed to
   OK
   NG

Result:  3

NG 

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH. Refer to  REMOVAL [02/2014 - ] 

Result:  1

OK 

See step  3

1. Disconnect the 4D 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
   L13-1 - 4D-30	Always	Below 1 Ω
   L13-1 or 4D-30 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  4

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [02/2014 - 11/2016] Refer to REMOVAL [11/2016 - ]

2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

   Refer to REMOVAL [02/2014 - 11/2016] Refer to REMOVAL [11/2016 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4D-30 - MB-2 (RCTY)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)v. Refer to  REMOVAL [02/2014 - 11/2016]  Refer to  REMOVAL [11/2016 - ] 

Result:  2

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [02/2014 - 11/2016]  Refer to  REMOVAL [11/2016 - ] 

1. Remove the rear door courtesy light switch assembly LH.

   Refer to REMOVAL [02/2014 - ]

2. Inspect the rear door courtesy light switch assembly LH.

   Refer to INSPECTION [02/2014 - ]

   Result

   Proceed to
   OK
   NG

Result:  3

NG 

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH. Refer to  REMOVAL [02/2014 - ] 

Result:  1

OK 

See step  6

1. Disconnect the 4H 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
   M14-1 - 4H-36	Always	Below 1 Ω
   M14-1 or 4H-36 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  7

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [02/2014 - 11/2016] Refer to REMOVAL [11/2016 - ]

2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

   Refer to REMOVAL [02/2014 - 11/2016] Refer to REMOVAL [11/2016 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4H-36 - MB-13 (LCTY)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [02/2014 - 11/2016]  Refer to  REMOVAL [11/2016 - ] 

Result:  2

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [02/2014 - 11/2016]  Refer to  REMOVAL [11/2016 - ]