Taillight Relay Circuit [06/2020 - 12/2021]: Procedure

1. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Input Signal	Taillight input condition	OFF or ON	OFF: Taillight not illuminated ON: Taillight illuminated	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Input Signal

   OK

   Display changes according to the light control switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [06/2020 - 12/2021] 

Result: 

OK 

See step  2

1. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Output Signal	Taillight output condition	OFF or ON	OFF: Taillight not illuminated ON: Taillight illuminated	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Output Signal

   OK

   Display changes according to the light control switch operation.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [06/2020 - 12/2021] 

Result: 

OK 

See step  3

1. Turn the light control switch to the TAIL position.
2. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [06/2020 - 12/2021] 

Result: 

NG 

See step  4

1. Disconnect the A55 headlight unit LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT UNIT LH. Refer to  DISASSEMBLY [06/2020 - 12/2021] 

Result: 

NG 

See step  5

1. Disconnect the A54 headlight unit RH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT UNIT RH. Refer to  REMOVAL [06/2020 - ] 

Result: 

NG 

See step  6

1. Disconnect the A64 front side marker light socket and wire LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FRONT SIDE MARKER LIGHT SOCKET AND WIRE LH. Refer to  DISASSEMBLY [06/2020 - 12/2021] 

Result: 

NG 

See step  7

1. Disconnect the A63 front side marker light socket and wire RH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE FRONT SIDE MARKER LIGHT SOCKET AND WIRE RH. Refer to  DISASSEMBLY [06/2020 - 12/2021] 

Result: 

NG 

See step  8

1. Disconnect the N18 rear combination light socket and wire LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  10

Result: 

OK 

See step  9

1. Disconnect the A No. 2 taillight LED LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NO. 2 TAILLIGHT LED LH. Refer to  DISASSEMBLY [06/2020 - ] 

Result: 

NG 

REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE LH. Refer to  DISASSEMBLY [06/2020 - ] 

1. Disconnect the M14 rear combination light socket and wire RH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  12

Result: 

OK 

See step  11

1. Disconnect the A No. 2 taillight LED RH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NO. 2 TAILLIGHT LED RH. Refer to  DISASSEMBLY [06/2020 - ] 

Result: 

NG 

REPLACE REAR COMBINATION LIGHT SOCKET AND WIRE RH. Refer to  DISASSEMBLY [06/2020 - ] 

1. Disconnect the R6 rear light socket and wire LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  14

Result: 

OK 

See step  13

1. Disconnect the A taillight LED LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TAILLIGHT LED LH. Refer to  DISASSEMBLY [06/2020 - ] 

Result: 

NG 

REPLACE REAR LIGHT SOCKET AND WIRE LH. Refer to  DISASSEMBLY [06/2020 - ] 

1. Disconnect the R7 rear light socket and wire RH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  16

Result: 

OK 

See step  15

1. Disconnect the A taillight LED LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE TAILLIGHT LED RH. Refer to  DISASSEMBLY [06/2020 - ] 

Result: 

NG 

REPLACE REAR LIGHT SOCKET AND WIRE RH. Refer to  DISASSEMBLY [06/2020 - ] 

1. Disconnect the R4 license plate light assembly LH connector.
2. Turn the light control switch to the TAIL position.
3. Using the GTS, read the Data List.

   Body Electrical > Power Distribution Box > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Tail Light Fuse Shut Off Status	Taillight fuse	OFF or ON	OFF: Fuse not shut off ON: Fuse shut off	-

   Body Electrical > Power Distribution Box > Data List 

   Tester Display
   Tail Light Fuse Shut Off Status

   OK

   The Data List value displays "OFF".

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE LICENSE PLATE LIGHT ASSEMBLY LH. Refer to  REMOVAL [06/2020 - ] 

Result: 

NG 

See step  17

1. Disconnect the 4E and 4F power distribution box assembly connectors.
2. Disconnect the N18 rear combination light socket and wire LH connector.
3. Disconnect the M14 rear combination light socket and wire RH connector.
4. Disconnect the R6 rear light socket and wire LH connector.
5. Disconnect the R7 rear light socket and wire RH connector.
6. Disconnect the R4 license plate light assembly LH connector.
7. Disconnect the A55 headlight unit LH connector.
8. Disconnect the A54 headlight unit RH connector.
9. Disconnect the A64 front side marker light socket and wire LH connector.
10. Disconnect the A63 front side marker light socket and wire RH connector.
11. Measure the voltage according to the value(s) in the table below.

    Standard Voltage

    Tester Connection	Condition	Specified Condition
    4E-18 or A55-1 (B) - Body ground	Always	10 kΩ or higher
    4F-30 or N18-1 (B) - Body ground	Always	10 kΩ or higher

    Result

    Proceed to
    OK
    NG

Result: 

OK 

REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [06/2020 - 12/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR