| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001C9SN |
| Model Year Start: 2019 | Model: GR Corolla | Prod Date Range: [06/2018 - 01/2019] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): B150718; Turn Signal Light Circuit Current Below Threshold; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019] | ||
|
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 |
|---|---|---|---|
|
B150718 |
Turn Signal Light Circuit Current Below Threshold |
Diagnosis Condition:
Malfunction Status:
|
|
- *: w/ AFS
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.
- When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH 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/ AFS |
A |
|
w/o AFS |
B |
| B |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A21 and A23 headlight assembly LH connector.
(b) Disconnect the I5 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A21-1 (TNS) - I5-1 (LL) |
Always |
Below 1 Ω |
|
A23-4 (GND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT HEADLIGHT CORD (HEADLIGHT UNIT ASSEMBLY LH) |
|
*1 |
Headlight Cord (Headlight Unit Assembly LH) |
- |
- |
|
*a |
Component without harness connected (Headlight ECU Sub-assembly LH) |
*b |
Component without harness connected (to Wire Harness) |
(a) Remove the headlight unit assembly LH.
Click here
![2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY](/t3Portal/stylegraphics/info.gif)
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A-11 (ECUB) - A21-1 (TNS) |
Always |
Below 1 Ω |
|
A-12 (GND) - A23-4 (GND) |
Always |
Below 1 Ω |
| NG |
|
|
|
5. |
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
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
B-20 (TURN+) - A-11 (ECUB) |
Always |
Below 1 Ω |
|
B-13 (TURN-) - A-12 (GND) |
Always |
Below 1 Ω |
| NG |
|
|
|
6. |
INSPECT TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY LH) |
(a) Inspect the turn signal light (headlight unit assembly LH).
Click here
| OK |
|
| NG |
|
|
7. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A83 headlight assembly LH connector.
(b) Disconnect the I5 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A83-2 (B) - I5-1 (LL) |
Always |
Below 1 Ω |
|
A83-3 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK LH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT ASSEMBLY LH) |
(a) Connect the I5 combination meter assembly connector.
(b) Interchange the headlight assembly LH with RH and connect the connectors.
Click here
(c) Operate the turn signal switch and check that the LH side front turn signal light operates normally.
OK:
LH side front turn signal light blinks.
| OK |
|
| NG |
|
|
9. |
CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the O43 rear combination light assembly LH connector.
(b) Disconnect the I5 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O43-4 (B) - I5-5 (TRNL) |
Always |
Below 1 Ω |
|
O43-3 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
CHECK LH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT ASSEMBLY LH) |
(a) Connect the I5 combination meter assembly connector.
(b) Interchange the rear combination light assembly LH with RH and connect the connectors.
Click here
(c) Operate the turn signal switch and check that the LH side rear turn signal light operates normally.
OK:
LH side rear turn signal light blinks.
| NG |
|
|
|
11. |
INSPECT REAR COMBINATION LIGHT LED LH |
(a) Remove the rear combination light LED LH from rear combination light assembly LH.
Click here
(b) Inspect the rear combination light LED LH.
Click here
| OK |
|
| NG |
|
|
12. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
w/ AFS |
A |
|
w/o AFS |
B |
| B |
|
|
|
13. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A20 and A22 headlight assembly RH connector.
(b) Disconnect the I5 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A20-1 (TNS) - I5-2 (LR) |
Always |
Below 1 Ω |
|
A22-4 (GND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
14. |
INSPECT HEADLIGHT CORD (HEADLIGHT UNIT ASSEMBLY RH) |
|
*1 |
Headlight Cord (Headlight Unit Assembly RH) |
- |
- |
|
*a |
Component without harness connected (Headlight ECU Sub-assembly RH) |
*b |
Component without harness connected (to Wire Harness) |
(a) Remove the headlight unit 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-11 (ECUB) - A20-1 (TNS) |
Always |
Below 1 Ω |
|
C-12 (GND) - A22-4 (GND) |
Always |
Below 1 Ω |
| NG |
|
|
|
15. |
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 |
|---|---|---|
|
D-20 (TURN+) - C-11 (ECUB) |
Always |
Below 1 Ω |
|
D-13 (TURN-) - C-12 (GND) |
Always |
Below 1 Ω |
| NG |
|
|
|
16. |
INSPECT TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY RH) |
(a) Inspect the turn signal light (headlight unit assembly RH).
Click here
| OK |
|
| NG |
|
|
17. |
CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the A82 headlight assembly RH connector.
(b) Disconnect the I5 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A82-2 (B) - I5-2 (LR) |
Always |
Below 1 Ω |
|
A82-3 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
18. |
CHECK RH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT ASSEMBLY RH) |
(a) Connect the I5 combination meter assembly connector.
(b) Interchange the headlight assembly RH with LH and connect the connectors.
Click here
(c) Operate the turn signal switch and check that the RH side front turn signal light operates normally.
OK:
RH side front turn signal light blinks.
| OK |
|
| NG |
|
|
19. |
CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the O42 rear combination light assembly RH connector.
(b) Disconnect the I5 combination meter assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O42-4 (B) - I5-6 (TRNR) |
Always |
Below 1 Ω |
|
O42-3 (E) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
20. |
CHECK RH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT ASSEMBLY RH) |
(a) Connect the I5 combination meter assembly connector.
(b) Interchange the rear combination light assembly RH with LH and connect the connectors.
Click here
(c) Operate the turn signal switch and check that the RH side rear turn signal light operates normally.
OK:
RH side rear turn signal light blinks.
| NG |
|
|
|
21. |
INSPECT REAR COMBINATION LIGHT LED RH |
(a) Remove the rear combination light LED RH from rear combination light assembly RH.
Click here
(b) Inspect the rear combination light LED RH.
Click here
| OK |
|
| NG |
|
|
|