| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001K2UE |
| Model Year Start: 2020 | Model: Avalon | Prod Date Range: [08/2019 - ] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): B150718; Turn Signal Light Circuit Current Below Threshold; 2020 - 2022 MY Avalon [08/2019 - ] | ||
|
DTC |
B150718 |
Turn Signal Light Circuit Current Below Threshold |
DESCRIPTION
This DTC is stored when the combination meter assembly detects an open in a front turn signal light circuit or rear turn signal light circuit.
HINT:
- If there is an open in a front turn signal light circuit or rear turn signal light circuit, the turn signal lights on the side with the open circuit will blink faster than usual.
- If there is an open in a side turn signal light circuit, DTC B150718 will not be stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Memory |
Note |
|---|---|---|---|---|---|
|
B150718 |
Turn Signal Light Circuit Current Below Threshold |
Diagnosis Condition:
Malfunction Status:
|
|
DTC stored |
- |
- *: w/ Cornering Light
WIRING DIAGRAM
LH SIDE
RH SIDE
CAUTION / NOTICE / HINT
NOTICE:
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
PROCEDURE
|
1. |
INSPECT LIGHTS |
(a) Inspect the illumination of each turn signal light.
|
Result |
Proceed to |
|---|---|
|
Front turn signal light LH does not blink |
A |
|
Rear turn signal light LH does not blink |
B |
|
Front turn signal light RH does not blink |
C |
|
Rear turn signal light RH does not blink |
D |
| B |
|
| C |
|
| D |
|
|
|
2. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
w/ Cornering Light |
A |
|
w/o Cornering Light |
B |
| B |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A62 headlight assembly LH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A62-11 (TNS) - G15-11 (LL) |
Always |
Below 1 Ω |
|
A62-12 (GND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH |
|
*a |
Component without harness connected (Headlight ECU Sub-assembly LH) |
- |
- |
(a) Remove the headlight ECU sub-assembly LH.
Click here
![2019 - 2022 MY Avalon Avalon HV [04/2018 - ]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B-20 (TURN+) - A62-11 (TNS) |
Always |
Below 1 Ω |
|
B-13 (TURN-) - A62-12 (GND) |
Always |
Below 1 Ω |
| NG |
|
|
|
5. |
CHECK HEADLIGHT ASSEMBLY LH |
(a) Connect the G15 combination meter assembly connector.
(b) Remove each headlight ECU sub-assembly, interchange the headlight assembly LH with RH and connect the connectors.
Click here
(c) Check that the front turn signal light operates normally.
OK:
Front turn signal light blinks.
| OK |
|
| NG |
|
REPLACE COMBINATION METER ASSEMBLY
|
|
6. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A45 headlight assembly LH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A45-2 (B) - G15-11 (LL) |
Always |
Below 1 Ω |
|
A45-7 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
CHECK HEADLIGHT ASSEMBLY LH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the headlight assembly LH with RH and connect the connectors.
Click here
(c) Check that the front turn signal light operates normally.
OK:
Front turn signal light blinks.
| OK |
|
| NG |
|
REPLACE COMBINATION METER ASSEMBLY
|
|
8. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
w/ Cornering Light |
A |
|
w/o Cornering Light |
B |
| B |
|
|
|
9. |
CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the P10 rear combination light assembly LH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P10-3 (TRN) - G15-10 (TRNL) |
Always |
Below 1 Ω |
|
P10-4 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
CHECK REAR COMBINATION LIGHT SOCKET AND WIRE LH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the rear combination light socket and wire LH with RH and connect the connectors.
Click here
(c) Check that the rear turn signal light operates normally.
OK:
Rear turn signal light blinks.
| OK |
|
|
|
11. |
INSPECT REAR COMBINATION LIGHT ASSEMBLY LH |
(a) Remove the rear combination light assembly LH.
Click here
(b) Inspect the rear combination light assembly LH.
Click here
| NG |
|
|
|
12. |
CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the P12 rear light assembly LH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P12-3 (B) - G15-10 (TRNL) |
Always |
Below 1 Ω |
|
P12-4 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
13. |
CHECK REAR LIGHT CORD LH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the rear light cord LH with RH and connect the connectors.
Click here
(c) Check that the rear turn signal light operates normally.
OK:
Rear turn signal light blinks.
| OK |
|
|
|
14. |
INSPECT REAR LIGHT ASSEMBLY LH |
(a) Remove the rear light assembly LH.
Click here
(b) Inspect the rear light assembly LH.
Click here
| OK |
|
REPLACE COMBINATION METER ASSEMBLY
|
| NG |
|
|
15. |
CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the P10 rear combination light assembly LH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P10-3 (TRN) - G15-10 (TRNL) |
Always |
Below 1 Ω |
|
P10-4 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
16. |
CHECK REAR COMBINATION LIGHT SOCKET AND WIRE LH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the rear combination light socket and wire LH with RH and connect the connectors.
Click here
(c) Check that the rear turn signal light operates normally.
OK:
Rear turn signal light blinks.
| OK |
|
|
|
17. |
INSPECT REAR COMBINATION LIGHT ASSEMBLY LH |
(a) Remove the rear combination light assembly LH.
Click here
(b) Inspect the rear combination light assembly LH.
Click here
| OK |
|
REPLACE COMBINATION METER ASSEMBLY
|
| NG |
|
|
18. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
w/ Cornering Light |
A |
|
w/o Cornering Light |
B |
| B |
|
|
|
19. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A63 headlight assembly RH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A63-11 (TNS) - G15-7 (LR) |
Always |
Below 1 Ω |
|
A63-12 (GND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
20. |
INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH |
|
*a |
Component without harness connected (Headlight ECU Sub-assembly RH) |
- |
- |
(a) Remove the headlight ECU sub-assembly RH.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C-20 (TURN+) - A63-11 (TNS) |
Always |
Below 1 Ω |
|
C-13 (TURN-) - A63-12 (GND) |
Always |
Below 1 Ω |
| NG |
|
|
|
21. |
CHECK HEADLIGHT ASSEMBLY RH |
(a) Connect the G15 combination meter assembly connector.
(b) Remove each headlight ECU sub-assembly, interchange the headlight assembly RH with LH and connect the connectors.
Click here
(c) Check that the front turn signal light operates normally.
OK:
Front turn signal light blinks.
| OK |
|
| NG |
|
REPLACE COMBINATION METER ASSEMBLY
|
|
22. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A44 headlight assembly RH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A44-2 (B) - G15-7 (LR) |
Always |
Below 1 Ω |
|
A44-7 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
23. |
CHECK HEADLIGHT ASSEMBLY RH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the headlight assembly RH with LH and connect the connectors.
Click here
(c) Check that the front turn signal light operates normally.
OK:
Front turn signal light blinks.
| OK |
|
| NG |
|
REPLACE COMBINATION METER ASSEMBLY
|
|
24. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
w/ Cornering Light |
A |
|
w/o Cornering Light |
B |
| B |
|
|
|
25. |
CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the P9 rear combination light assembly RH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P9-3 (TRN) - G15-13 (TRNR) |
Always |
Below 1 Ω |
|
P9-4 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
26. |
CHECK REAR COMBINATION LIGHT SOCKET AND WIRE RH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the rear combination light socket and wire RH with LH and connect the connectors.
Click here
(c) Check that the rear turn signal light operates normally.
OK:
Rear turn signal light blinks.
| OK |
|
|
|
27. |
INSPECT REAR COMBINATION LIGHT ASSEMBLY RH |
(a) Remove the rear combination light assembly RH.
Click here
(b) Inspect the rear combination light assembly RH.
Click here
| NG |
|
|
|
28. |
CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the P11 rear light assembly RH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P11-3 (B) - G15-13 (TRNR) |
Always |
Below 1 Ω |
|
P11-4 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
29. |
CHECK REAR LIGHT CORD RH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the rear light cord RH with LH and connect the connectors.
Click here
(c) Check that the rear turn signal light operates normally.
OK:
Rear turn signal light blinks.
| OK |
|
|
|
30. |
INSPECT REAR LIGHT ASSEMBLY RH |
(a) Remove the rear light assembly RH.
Click here
(b) Inspect the rear light assembly RH.
Click here
| OK |
|
REPLACE COMBINATION METER ASSEMBLY
|
| NG |
|
|
31. |
CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the P9 rear combination light assembly RH connector.
(b) Disconnect the G15 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
P9-3 (TRN) - G15-13 (TRNR) |
Always |
Below 1 Ω |
|
P9-4 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
32. |
CHECK REAR COMBINATION LIGHT SOCKET AND WIRE RH |
(a) Connect the G15 combination meter assembly connector.
(b) Interchange the rear combination light socket and wire RH with LH and connect the connectors.
Click here
(c) Check that the rear turn signal light operates normally.
OK:
Rear turn signal light blinks.
| OK |
|
|
|
33. |
INSPECT REAR COMBINATION LIGHT ASSEMBLY RH |
(a) Remove the rear combination light assembly RH.
Click here
(b) Inspect the rear combination light assembly RH.
Click here
| OK |
|
REPLACE COMBINATION METER ASSEMBLY
|
| NG |
|
|
|