| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GUSU |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 03/2019] |
| Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): B150819; Turn Signal/Hazard Flasher Circuit Current Above Threshold; 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019] | ||
|
DTC |
B150819 |
Turn Signal/Hazard Flasher Circuit Current Above Threshold |
DESCRIPTION
This DTC is stored when the combination meter assembly detects a short in a turn signal light circuit.
HINT:
If there is a short in a turn signal light circuit, all of the turn signal lights in that circuit will not blink.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B150819 |
Turn Signal/Hazard Flasher Circuit Current Above Threshold |
Diagnosis Condition:
Malfunction Status:
|
|
- *1: w/ AFS
- *2: for LED Type Front Turn Signal Light
- *3: for Bulb Type Front Turn Signal Light
- *4: w/ Side Turn Signal Light
- *5: for LED Type Rear Turn Signal Light
- *6: for Bulb Type Rear Turn Signal Light
WIRING DIAGRAM
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.
- Inspect the turn signal light bulbs before performing the following procedure.
PROCEDURE
|
1. |
CHECK SYMPTOMS |
(a) Check the problem symptoms.
|
Result |
Proceed to |
|---|---|
|
All LH side turn signal lights do not blink |
A |
|
All RH side turn signal lights do not blink |
B |
| B |
|
|
|
2. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|
|---|---|---|
|
Specifications |
Front Turn Signal Light |
|
|
w/ AFS |
LED Type |
A |
|
w/o AFS |
LED Type |
B |
|
Bulb Type |
C |
|
| B |
|
| C |
|
|
|
3. |
CHECK LH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT) |
(a) Disconnect the A23 headlight assembly LH connector.
(b) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.
HINT:
If the LH side turn signal lights other than the front turn signal light blink, a component of the headlight assembly LH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the front turn signal light blink |
A |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) (w/ Side Turn Signal Light) |
B |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) (w/o Side Turn Signal Light) |
C |
| B |
|
| C |
|
|
|
4. |
CHECK LH SIDE TURN SIGNAL LIGHTS (HEADLIGHT CORD (HEADLIGHT UNIT ASSEMBLY LH)) |
(a) Connect the headlight assembly LH connector.
(b) Disconnect the B headlight cord (headlight unit assembly LH) connector.
(c) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.
HINT:
If all LH side turn signal lights do not blink, the headlight cord (headlight unit assembly LH) is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the front turn signal light blink |
A |
|
All LH side turn signal lights do not blink |
B |
| B |
|
|
|
5. |
CHECK LH SIDE TURN SIGNAL LIGHTS (HEADLIGHT ECU SUB-ASSEMBLY LH) |
(a) Remove the headlight ECU sub-assembly LH.
Click here
![2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Connect the headlight cord (headlight unit assembly LH) connector to the headlight ECU sub-assembly LH connector.
(c) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.
HINT:
If all LH side turn signal lights do not blink, the headlight ECU sub-assembly LH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the front turn signal light blink |
A |
|
All LH side turn signal lights do not blink |
B |
| A |
|
| B |
|
|
6. |
CHECK LH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT) |
(a) Disconnect the A83 headlight assembly LH connector.
(b) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.
HINT:
If the LH side turn signal lights other than the front turn signal light blink, the headlight unit assembly LH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the front turn signal light blink |
A |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) (w/ Side Turn Signal Light) |
B |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) (w/o Side Turn Signal Light) |
C |
| A |
|
| B |
|
| C |
|
|
7. |
CHECK LH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT) |
(a) Disconnect the A90 headlight assembly LH connector.
(b) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.
HINT:
If the LH side turn signal lights other than the front turn signal light blink, the front turn signal light socket LH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the front turn signal light blink |
A |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) (w/ Side Turn Signal Light) |
B |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) (w/o Side Turn Signal Light) |
C |
| A |
|
| C |
|
|
|
8. |
CHECK LH SIDE TURN SIGNAL LIGHTS (SIDE TURN SIGNAL LIGHT CIRCUIT) |
(a) Connect the headlight assembly LH connector.
(b) Disconnect the L9 outer rear view mirror assembly LH connector.
(c) Operate the turn signal switch and check that the LH side turn signal lights other than the side turn signal light blink.
HINT:
If the LH side turn signal lights other than the side turn signal light blink, a component of the outer rear view mirror assembly LH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the side turn signal light blink |
A |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) |
B |
| B |
|
|
|
9. |
CHECK LH SIDE TURN SIGNAL LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY LH) |
(a) Remove the side turn signal light assembly LH from outer rear view mirror assembly LH.
Click here
(b) Connect the wire harness connector to the outer rear view mirror assembly LH connector.
(c) Operate the turn signal switch and check that the LH side turn signal lights other than the side turn signal light blink.
HINT:
If all LH side turn signal lights do not blink, the outer rear view mirror assembly LH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the side turn signal light blink |
A |
|
All LH side turn signal lights do not blink |
B |
| A |
|
| B |
|
|
10. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
for Bulb Type Rear Turn Signal Light |
A |
|
for LED Type Rear Turn Signal Light |
B |
| B |
|
|
|
11. |
CHECK LH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT) |
(a) Connect the outer rear view mirror assembly LH connector.*1
(b) Connect the headlight assembly LH connector.*2
(c) Disconnect the O104 rear combination light assembly LH connector.
(d) Operate the turn signal switch and check that the LH side turn signal lights other than the rear turn signal light blink.
HINT:
If the LH side turn signal lights other than the rear turn signal light blink, the rear combination light cord LH is malfunctioning.
- *1: w/ Side Turn Signal Light
- *2: w/o Side Turn Signal Light
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the rear turn signal light blink |
A |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) |
B |
| A |
|
| B |
|
|
12. |
CHECK LH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT) |
(a) Connect the outer rear view mirror assembly LH connector.*1
(b) Connect the headlight assembly LH connector.*2
(c) Disconnect the O43 rear combination light assembly LH connector.
(d) Operate the turn signal switch and check that the LH side turn signal lights other than the rear turn signal light blink.
HINT:
If the LH side turn signal lights other than the rear turn signal light blink, a component of the rear combination light assembly LH is malfunctioning.
- *1: w/ Side Turn Signal Light
- *2: w/o Side Turn Signal Light
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the rear turn signal light blink |
A |
|
Problem symptoms do not change (All LH side turn signal lights do not blink) |
B |
| B |
|
|
|
13. |
CHECK LH SIDE TURN SIGNAL LIGHTS (REAR COMBINATION LIGHT CORD LH) |
(a) Remove the rear combination light LED LH from rear combination light assembly LH.
Click here
(b) Connect the wire harness connector to the rear combination light assembly LH connector.
(c) Operate the turn signal switch and check that the LH side turn signal lights other than the rear turn signal light blink.
HINT:
If all LH side turn signal lights do not blink, the rear combination light cord LH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
LH side turn signal lights other than the rear turn signal light blink |
A |
|
All LH side turn signal lights do not blink |
B |
| A |
|
| B |
|
|
14. |
CHECK HARNESS AND CONNECTOR (LH SIDE EACH PARTS - COMBINATION METER ASSEMBLY) |
(a) Disconnect the A21*1, A83*2 or A90*3 headlight assembly LH connector.
(b) Disconnect the L9 outer rear view mirror assembly LH connector.*4
(c) Disconnect the I5 combination meter assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A21-1 (TNS)*1, A83-2 (B)*2, A90-1 (B)*3, L9-5 (B)*4 or I5-1 (LL) - Body ground |
Always |
10 kΩ or higher |
|
O43-4 (B)*5, O104-3 (B)*6 or I5-5 (TRNL) - Body ground |
Always |
10 kΩ or higher |
- *1: w/ AFS
- *2: for LED Type Front Turn Signal Light without AFS
- *3: for Bulb Type Front Turn Signal Light without AFS
- *4: w/ Side Turn Signal Light
- *5: for LED Type Rear Turn Signal Light
- *6: for Bulb Type Rear Turn Signal Light
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
15. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|
|---|---|---|
|
Specifications |
Front Turn Signal Light |
|
|
w/ AFS |
LED Type |
A |
|
w/o AFS |
LED Type |
B |
|
Bulb Type |
C |
|
| B |
|
| C |
|
|
|
16. |
CHECK RH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT) |
(a) Disconnect the A20 headlight assembly RH connector.
(b) Operate the turn signal switch and check that the RH side turn signal lights other than the front turn signal light blink.
HINT:
If the RH side turn signal lights other than the front turn signal light blink, a component of the headlight assembly RH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the front turn signal light blink |
A |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) (w/ Side Turn Signal Light) |
B |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) (w/o Side Turn Signal Light) |
C |
| B |
|
| C |
|
|
|
17. |
CHECK RH SIDE TURN SIGNAL LIGHTS (HEADLIGHT CORD (HEADLIGHT UNIT ASSEMBLY RH)) |
(a) Connect the headlight assembly RH connector.
(b) Disconnect the D headlight cord (headlight unit assembly RH) connector.
(c) Operate the turn signal switch and check that the RH side turn signal lights other than the front turn signal light blink.
HINT:
If all RH side turn signal lights do not blink, the headlight cord (headlight unit assembly RH) is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the front turn signal light blink |
A |
|
All RH side turn signal lights do not blink |
B |
| B |
|
|
|
18. |
CHECK RH SIDE TURN SIGNAL LIGHTS (HEADLIGHT ECU SUB-ASSEMBLY RH) |
(a) Remove the headlight ECU sub-assembly RH.
Click here
(b) Connect the headlight cord (headlight unit assembly RH) connector to the headlight ECU sub-assembly RH connector.
(c) Operate the turn signal switch and check that the RH side turn signal lights other than the front turn signal light blink.
HINT:
If all RH side turn signal lights do not blink, the headlight ECU sub-assembly RH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the front turn signal light blink |
A |
|
All RH side turn signal lights do not blink |
B |
| A |
|
| B |
|
|
19. |
CHECK RH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT) |
(a) Disconnect the A82 headlight assembly RH connector.
(b) Operate the turn signal switch and check that the RH side turn signal lights other than the front turn signal light blink.
HINT:
If the RH side turn signal lights other than the front turn signal light blink, the headlight unit assembly RH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the front turn signal light blink |
A |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) (w/ Side Turn Signal Light) |
B |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) (w/o Side Turn Signal Light) |
C |
| A |
|
| B |
|
| C |
|
|
20. |
CHECK RH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT) |
(a) Disconnect the A87 headlight assembly RH connector.
(b) Operate the turn signal switch and check that the RH side turn signal lights other than the front turn signal light blink.
HINT:
If the RH side turn signal lights other than the front turn signal light blink, the front turn signal light socket is RH malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the front turn signal light blink |
A |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) (w/ Side Turn Signal Light) |
B |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) (w/o Side Turn Signal Light) |
C |
| A |
|
| C |
|
|
|
21. |
CHECK RH SIDE TURN SIGNAL LIGHTS (SIDE TURN SIGNAL LIGHT CIRCUIT) |
(a) Connect the headlight assembly RH connector.
(b) Disconnect the K10 outer rear view mirror assembly RH connector.
(c) Operate the turn signal switch and check that the RH side turn signal lights other than the side turn signal light blink.
HINT:
If the RH side turn signal lights other than the side turn signal light blink, a component of the outer rear view mirror assembly RH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the side turn signal light blink |
A |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) |
B |
| B |
|
|
|
22. |
CHECK RH SIDE TURN SIGNAL LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY RH) |
(a) Remove the side turn signal light assembly RH from outer rear view mirror assembly RH.
Click here
(b) Connect the wire harness connector to the outer rear view mirror assembly RH connector.
(c) Operate the turn signal switch and check that the RH side turn signal lights other than the side turn signal light blink.
HINT:
If all RH side turn signal lights do not blink, the outer rear view mirror assembly RH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the side turn signal light blink |
A |
|
All RH side turn signal lights do not blink |
B |
| A |
|
| B |
|
|
23. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
for Bulb Type Rear Turn Signal Light |
A |
|
for LED Type Rear Turn Signal Light |
B |
| B |
|
|
|
24. |
CHECK RH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT) |
(a) Connect the outer rear view mirror assembly RH connector.*1
(b) Connect the headlight assembly RH connector.*2
(c) Disconnect the O103 rear combination light assembly RH connector.
(d) Operate the turn signal switch and check that the RH side turn signal lights other than the rear turn signal light blink.
HINT:
If the RH side turn signal lights other than the rear turn signal light blink, the rear combination light cord RH is malfunctioning.
- *1: w/ Side Turn Signal Light
- *2: w/o Side Turn Signal Light
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the rear turn signal light blink |
A |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) |
B |
| A |
|
| B |
|
|
25. |
CHECK RH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT) |
(a) Connect the outer rear view mirror assembly RH connector.*1
(b) Connect the headlight assembly RH connector.*2
(c) Disconnect the O42 rear combination light assembly RH connector.
(d) Operate the turn signal switch and check that the RH side turn signal lights other than the rear turn signal light blink.
HINT:
If the RH side turn signal lights other than the rear turn signal light blink, a component of the rear combination light assembly RH is malfunctioning.
- *1: w/ Side Turn Signal Light
- *2: w/o Side Turn Signal Light
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the rear turn signal light blink |
A |
|
Problem symptoms do not change (All RH side turn signal lights do not blink) |
B |
| B |
|
|
|
26. |
CHECK RH SIDE TURN SIGNAL LIGHTS (REAR COMBINATION LIGHT CORD RH) |
(a) Remove the rear combination light LED RH from rear combination light assembly RH.
Click here
(b) Connect the wire harness connector to the rear combination light assembly RH connector.
(c) Operate the turn signal switch and check that the RH side turn signal lights other than the rear turn signal light blink.
HINT:
If all RH side turn signal lights do not blink, the rear combination light cord RH is malfunctioning.
|
Result |
Proceed to |
|---|---|
|
RH side turn signal lights other than the rear turn signal light blink |
A |
|
All RH side turn signal lights do not blink |
B |
| A |
|
| B |
|
|
27. |
CHECK HARNESS AND CONNECTOR (RH SIDE EACH PARTS - COMBINATION METER ASSEMBLY) |
(a) Disconnect the A20*1, A82*2 or A87*3 headlight assembly RH connector.
(b) Disconnect the K10 outer rear view mirror assembly RH connector.*4
(c) Disconnect the I5 combination meter assembly connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A20-1 (TNS)*1, A82-2 (B)*2, A87-1 (B)*3, K10-5 (B)*4 or I5-2 (LR) - Body ground |
Always |
10 kΩ or higher |
|
O42-4 (B)*5, O103-3 (B)*6 or I5-6 (TRNR) - Body ground |
Always |
10 kΩ or higher |
- *1: w/ AFS
- *2: for LED Type Front Turn Signal Light without AFS
- *3: for Bulb Type Front Turn Signal Light without AFS
- *4: w/ Side Turn Signal Light
- *5: for LED Type Rear Turn Signal Light
- *6: for Bulb Type Rear Turn Signal Light
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|