The main body ECU (multiplex network body ECU) controls the taillight and license plate light.
for LED Headlight
for Halogen Headlight
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this symptom.
for HEV Model: Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for HEV Model)>HOW TO PROCEED WITH TROUBLESHOOTING202307,999999,_57,_104409,_0606038,RM100000002C0LC,
for Gasoline Model: Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING202307,202405,_57,_104409,_0605911,RM100000002C07Y,202405,999999,_57,_104409,_0605911,RM100000002NU3H,
First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CXPI communication malfunctions before troubleshooting this symptom.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Input Signal | Tail light input | OFF or ON | OFF: Taillight is not input
ON: Tail light is input |
- |
| Tester Display |
|---|
| Tail Light Input Signal |
Display changes according to the taillight illumination condition.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Output Signal | Tail light output | OFF or ON | OFF: Taillight is not output
ON: Tail light is output |
- |
| Tester Display |
|---|
| Tail Light Output Signal |
Display changes according to the taillight illumination condition.
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Check vehicle type.
| Result | Proceed to |
|---|---|
| for LED Headlight | A |
| for Halogen Headlight | B |
A
B
Check vehicle type.
| Result | Proceed to |
|---|---|
| for TFTM Model | A |
| for GTMC Model | B |
A
B
Disconnect the A176 headlight assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the A175 headlight assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the S16 rear combination assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the S17 rear combination assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U51 rear light assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U50 rear light assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U47 license plate light assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U48 license plate light assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the 8E and 8F power distribution box assembly connectors.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A176-8 (B)*1 - Body ground
A176-3 (B)*2 - Body ground |
Always | 10 kΩ or higher |
| A175-8 (B)*1 - Body ground
A175-3 (B)*2 - Body ground |
Always | 10 kΩ or higher |
| S16-2 (TL) - Body ground | Always | 10 kΩ or higher |
| S17-2 (TL) - Body ground | Always | 10 kΩ or higher |
| U47-1 (B) - Body ground | Always | 10 kΩ or higher |
| U48-1 (B) - Body ground | Always | 10 kΩ or higher |
| U51-2 (B) - Body ground | Always | 10 kΩ or higher |
| U50-2 (B) - Body ground | Always | 10 kΩ or higher |
| 8E-18 - Body ground | Always | 10 kΩ or higher |
| 8F-30 - Body ground | Always | 10 kΩ or higher |
*1: for TFTM Made
*2: for GTMC Made
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the A176 headlight assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the A175 headlight assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the S16 rear combination assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the S17 rear combination assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U7 rear light assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U6 rear light assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U47 license plate light assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U48 license plate light assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the 8E and 8F power distribution box assembly connectors.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A176-8 (B)*1 - Body ground
A176-3 (B)*2 - Body ground |
Always | 10 kΩ or higher |
| A175-8 (B)*1 - Body ground
A175-3 (B)*2 - Body ground |
Always | 10 kΩ or higher |
| S16-2 (TL) - Body ground | Always | 10 kΩ or higher |
| S17-2 (TL) - Body ground | Always | 10 kΩ or higher |
| U47-1 (B) - Body ground | Always | 10 kΩ or higher |
| U48-1 (B) - Body ground | Always | 10 kΩ or higher |
| U7-1 (B) - Body ground | Always | 10 kΩ or higher |
| U6-1 (B) - Body ground | Always | 10 kΩ or higher |
| 8E-18 - Body ground | Always | 10 kΩ or higher |
| 8F-30 - Body ground | Always | 10 kΩ or higher |
*1: for TFTM Made
*2: for GTMC Made
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the A138 headlight assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the A143 headlight assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the S8 rear combination assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the S10 rear combination assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U47 license plate light assembly LH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the U48 license plate light assembly RH connector.
Turn the light control switch to the AUTO (OFF) position.
If the low beam headlights or clearance lights illuminate when the ignition switch is turned ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.
Turn the light control switch to the TAIL position.
Using the GTS, read the Data List.
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Tail Light Fuse Shut Off Status | Tail light fuse condition | OFF or ON | OFF: Taillight fuse not shut off
ON: Taillight fuse shut off |
- |
| Tester Display |
|---|
| Tail Light Fuse Shut Off Status |
The Data List value displays "OFF".
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the 8E and 8F power distribution box assembly connectors.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A138-2(B) - Body ground | Always | 10 kΩ or higher |
| A143-2(B) - Body ground | Always | 10 kΩ or higher |
| S8-2 (TL) - Body ground | Always | 10 kΩ or higher |
| S10-2 (TL) - Body ground | Always | 10 kΩ or higher |
| U47-1 (B) - Body ground | Always | 10 kΩ or higher |
| U48-1 (B) - Body ground | Always | 10 kΩ or higher |
| 8E-18 - Body ground | Always | 10 kΩ or higher |
| 8F-30 - Body ground | Always | 10 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG