| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000026ZEM |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM (w/ Safe Exit Assist Function): U023287; Lost Communication with Side Obstacle Detection Control Module "A" Missing Message; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
|
DTC |
U023287 |
Lost Communication with Side Obstacle Detection Control Module "A" Missing Message |
DESCRIPTION
This DTC is stored when the blind spot monitor sensor LH (B) judges that there is a communication problem with the blind spot monitor sensor RH (A).
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
U023287 |
Lost Communication with Side Obstacle Detection Control Module "A" Missing Message |
The blind spot monitor sensor LH (B) cannot receive signals from the blind spot monitor sensor RH (A) |
|
WIRING DIAGRAM
except G16E-GTS engine
for G16E-GTS engine
CAUTION / NOTICE / HINT
NOTICE:
- When checking for DTCs, make sure that the blind spot monitor system is turned on.
- Inspect the fuses for circuits related to this system before performing the following procedure.
- Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
-
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
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HINT:
- Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
- Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
|
1. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
|
Result |
Proceed to |
|---|---|
|
except G16E-GTS engine |
A |
|
for G16E-GTS engine |
B |
| B |
|
|
|
2. |
CHECK CAN BUS MAIN WIRE |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
Procedure1
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I214-7 - I214-18 |
Cable disconnected from negative (-) auxiliary battery terminal |
54 to 69 Ω |
|
I214-7 - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
I214-18 - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
I214-7 - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
I214-18 - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
Result |
Proceed to |
|---|---|
|
I214-7 - I214-18 is more than or equal to 70 Ω |
A |
|
I214-7 - I214-18 is less than or equal to 54 Ω |
B |
|
I214-7 - Body ground is less than or equal to 200 Ω |
C |
|
I214-18 - Body ground is less than or equal to 200 Ω |
D |
|
I214-7 - +B is less than or equal to 6 kΩ |
E |
|
I214-18 - +B is less than or equal to 6 kΩ |
F |
|
None of the above conditions are met |
G |
Post-procedure1
(c) None
| B |
|
| C |
|
| D |
|
| E |
|
| F |
|
| G |
|
|
|
3. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 15 CAN JUNCTION CONNECTOR) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I214 No. 15 CAN junction connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I214-7 - I214-18 |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| NG |
|
|
|
4. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 15 CAN JUNCTION CONNECTOR) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I214 No. 15 CAN junction connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I214-5 - I214-16 |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| OK |
|
REPLACE NO. 15 CAN JUNCTION CONNECTOR |
|
|
5. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH (A)) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O58 blind spot monitor sensor RH (A) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O58-1 (CA2P) - O58-6 (CA2N) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR RH (A)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR |
|
6. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH (B)) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O57 blind spot monitor sensor LH (B) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O57-1 (CA2P) - O57-6 (CA2N) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR LH (B)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH (B) - BLIND SPOT MONITOR SENSOR RH (A)) |
|
7. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 15 CAN JUNCTION CONNECTOR) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I214 No. 15 CAN junction connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I214-7 - I214-18 |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| NG |
|
|
|
8. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 15 CAN JUNCTION CONNECTOR) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I214 No. 15 CAN junction connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I214-5 - I214-16 |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| OK |
|
REPLACE NO. 15 CAN JUNCTION CONNECTOR |
|
|
9. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH (A)) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O58 blind spot monitor sensor RH (A) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O58-1 (CA2P) - O58-6 (CA2N) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR RH (A)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - NO. 15 CAN JUNCTION CONNECTOR) |
|
10. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH (B)) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O57 blind spot monitor sensor LH (B) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O57-1 (CA2P) - O57-6 (CA2N) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
Post-procedure1
(d) None
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR LH (B)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH (B) - NO. 15 CAN JUNCTION CONNECTOR) |
|
11. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 15 CAN JUNCTION CONNECTOR) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I214 No. 15 CAN junction connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I214-7 - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
I214-18 - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
I214-7 - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
I214-18 - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Post-procedure1
(d) None
| NG |
|
|
|
12. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 15 CAN JUNCTION CONNECTOR) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I214 No. 15 CAN junction connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
I214-5 -Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
I214-16 - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
I214-5 - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
I214-16 - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Post-procedure1
(d) None
| OK |
|
REPLACE NO. 15 CAN JUNCTION CONNECTOR |
|
|
13. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH (A)) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O58 blind spot monitor sensor RH (A) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O58-1 (CA2P) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O58-6 (CA2N) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O58-1 (CA2P) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
O58-6 (CA2N) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Post-procedure1
(d) None
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR RH (A)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - NO. 15 CAN JUNCTION CONNECTOR) |
|
14. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH (B)) |
Pre-procedure1
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O57 blind spot monitor sensor LH (B) connector.
Procedure1
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O57-1 (CA2P) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O57-6 (CA2N) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O57-1 (CA2P) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
O57-6 (CA2N) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
Post-procedure1
(d) None
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR LH (B)
|
| NG |
|
REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - NO. 15 CAN JUNCTION CONNECTOR) |
|
15. |
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - BODY GROUND) |
Procedure1
(a) Click here
Post-procedure1
(b) None
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
16. |
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) POWER SOURCE) |
Procedure1
(a) Click here
Post-procedure1
(b) None
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
17. |
CHECK DTC |
(a) Check for DTCs.
Body Electrical > Blind Spot Monitor "B" > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| A |
|
|
|
18. |
REPLACE BLIND SPOT MONITOR SENSOR RH (A) |
(a) Replace the blind spot monitor sensor RH (A).
HINT:
Click here
|
|
19. |
RECHECK DTC |
(a) Recheck for DTCs and check if the same DTC is output again.
Body Electrical > Blind Spot Monitor "B" > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| A |
|
END |
| B |
|
REPLACE BLIND SPOT MONITOR SENSOR LH (B)
|
|
20. |
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - BODY GROUND) |
Click here
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
21. |
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - POWER SOURCE) |
Click here
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
22. |
CHECK CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH (A)) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O58 blind spot monitor sensor RH (A) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O58-1 (CA2P) - O58-6 (CA2N) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
|
O58-1 (CA2P) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O58-6 (CA2N) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O58-1 (CA2P) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
O58-6 (CA2N) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR RH (A)
|
|
|
23. |
CHECK CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH (B)) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the O57 blind spot monitor sensor LH (B) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
O57-1 (CA2P) - O57-6 (CA2N) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132 Ω |
|
O57-1 (CA2P) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O57-6 (CA2N) - Body ground |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
O57-1 (CA2P) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
O57-6 (CA2N) - +B |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
| OK |
|
REPLACE BLIND SPOT MONITOR SENSOR LH (B)
|
| NG |
|
REPAIR OR REPLACE CAN BUS WIRES OR CONNECTOR |
|
|