The main body ECU (multiplex network body ECU) controls the taillight and license plate light.
for TFTM Made
for GTMC Made
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.
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 TFTM Model | A |
| for GTMC Model | B |
A
B
Check vehicle type.
| Result | Proceed to |
|---|---|
| for LED Headlight | A |
| for Halogen Headlight | B |
A
B
Disconnect the A166 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 A165 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 O104 rear combination 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 O103 rear combination 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 O110 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 O109 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 O149 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 O148 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 10A and 10G power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A166-5 (B) - Body ground | Always | 10 kΩ or higher |
| A165-5 (B) - Body ground | Always | 10 kΩ or higher |
| O104-1 (TL) - Body ground | Always | 10 kΩ or higher |
| O103-1 (TL) - Body ground | Always | 10 kΩ or higher |
| O149-1 (B) - Body ground | Always | 10 kΩ or higher |
| O148-1 (B) - Body ground | Always | 10 kΩ or higher |
| O110-4 (B) - Body ground | Always | 10 kΩ or higher |
| O109-4 (B) - Body ground | Always | 10 kΩ or higher |
| 10A-20 - Body ground | Always | 10 kΩ or higher |
| 10G-15 - Body ground | Always | 10 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the A160 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 A159 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 O104 rear combination 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 O103 rear combination 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 O110 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 O109 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 O149 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 O148 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 10A and 10G power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A160-4 (B) - Body ground | Always | 10 kΩ or higher |
| A159-4 (B) - Body ground | Always | 10 kΩ or higher |
| O104-1 (TL) - Body ground | Always | 10 kΩ or higher |
| O103-1 (TL) - Body ground | Always | 10 kΩ or higher |
| O149-1 (B) - Body ground | Always | 10 kΩ or higher |
| O148-1 (B) - Body ground | Always | 10 kΩ or higher |
| O110-4 (B) - Body ground | Always | 10 kΩ or higher |
| O109-4 (B) - Body ground | Always | 10 kΩ or higher |
| 10A-20 - Body ground | Always | 10 kΩ or higher |
| 10G-15 - Body ground | Always | 10 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG
Disconnect the A168 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 A167 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 O104 rear combination 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 O103 rear combination 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 O113 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 O112 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 10A and 10G power distribution box assembly connector.
Measure the resistance according to the value(s) in the table below.
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| A168-7(B) - Body ground | Always | 10 kΩ or higher |
| A167-7(B) - Body ground | Always | 10 kΩ or higher |
| O104-1 (TL) - Body ground | Always | 10 kΩ or higher |
| O103-1 (TL) - Body ground | Always | 10 kΩ or higher |
| O113-1 (B) - Body ground | Always | 10 kΩ or higher |
| O112-1 (B) - Body ground | Always | 10 kΩ or higher |
| 10A-20 - Body ground | Always | 10 kΩ or higher |
| 10G-15 - Body ground | Always | 10 kΩ or higher |
| Proceed to |
|---|
| OK |
| NG |
OK
NG