Front Door Courtesy Switch Circuit [09/2022 - 11/2022]: Procedure

1. 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
   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 SW" is not normal)	C

Result: 

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

Refer to PROBLEM SYMPTOMS TABLE [09/2022 - 11/2022] 

Result: 

C 

See step  5

Result: 

B 

See step  2

1. Inspect the front door courtesy light switch assembly LH.

   Refer to INSPECTION [06/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH 

Refer to REMOVAL [01/2019 - ]

Result: 

OK 

See step  3

1. Disconnect the 8H 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
   O30-1 - 8H-23	Always	Below 1 Ω
   O30-1 or 8H-23 - 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 [09/2022 - 11/2022]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   8H-23 - MB-2 (FLCY)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]

1. Inspect the front door courtesy light switch assembly RH.

   Refer to INSPECTION [06/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH 

Refer to REMOVAL [01/2019 - ]

Result: 

OK 

See step  6

1. Disconnect the 8H 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
   O32-1 - 8H-22	Always	Below 1 Ω
   O32-1 or 8H-22 - 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 [09/2022 - 11/2022]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   8H-22 - MB-4 (FRCY)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

Refer to REMOVAL [09/2022 - 11/2022]

Result: 

NG 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY 

Refer to REMOVAL [09/2022 - 11/2022]