Front Door Courtesy Switch Circuit [11/2023 - ]: Procedure

1. Read the Data List according to the display on the GTS.

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   FR Door Courtesy Switch Status	Front door courtesy light switch assembly (for RH) signal	Close or Open	Close: Front door RH closed Open: Front door RH open	-
   FL Door Courtesy Switch Status	Front door courtesy light switch assembly (for LH) signal	Close or Open	Close: Front door LH closed Open: Front door LH open	-

   Body Electrical > Main Body > Data List 

   Tester Display
   FR Door Courtesy Switch Status
   FL Door Courtesy Switch Status

   OK

   Normal conditions listed above are displayed.

   Result

   Result	Proceed to
   OK	A
   NG ("FL Door Courtesy Switch Status" is not normal)	B
   NG ("FR Door Courtesy Switch Status" is not normal)	C

Result: 

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2023 - ]  

Result: 

C 

See step  5

Result: 

B 

See step  2

Refer to INSPECTION [12/2019 - ]

Result

Result: 

NG 

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH. Refer to  REMOVAL [12/2019 - ] 

Result: 

OK 

See step  3

1. Disconnect the 8G power distribution box assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M47-1 - 8G-3	Always	Below 1 Ω
   M47-1 or 8G-3 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

   Refer to REMOVAL [11/2023 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   8G-3 - MB-2	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [11/2023 - ] 

Refer to INSPECTION [12/2019 - ]

Result

Result: 

NG 

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH. Refer to  REMOVAL [12/2019 - ] 

Result: 

OK 

See step  6

1. Disconnect the 8C power distribution box assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M3-1 - 8C-9	Always	Below 1 Ω
   M3-1 or 8C-9 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

   Refer to REMOVAL [11/2023 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   8C-9 - MB-4	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [11/2023 - ]