Last Modified: 05-13-2024 |
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)
|
-
Open or short in CAN bus main wire or connector
-
Open or short in No. 15 CAN junction connector
-
Blind spot monitor sensor LH (B)
-
Power source circuit of blind spot monitor sensor RH (A)
-
Blind spot monitor sensor RH (A) ground circuit
-
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.
Click here
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
(a) Choose the model to be inspected.
Result
|
Proceed to
|
except G16E-GTS engine
|
A
|
for G16E-GTS engine
|
B
|
A
|
|
|
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
A
|
|
|
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
OK
|
|
|
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
|
NG
|
|
|
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
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
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
OK
|
|
|
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
|
NG
|
|
|
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
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
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
OK
|
|
|
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
|
NG
|
|
|
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
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
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
|
OK
|
|
|
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
|
OK
|
|
|
(a) Check for DTCs.
Body Electrical > Blind Spot Monitor "B" > Trouble Codes
Result
|
Proceed to
|
DTCs are not output
|
A
|
DTCs are output
|
B
|
B
|
|
|
18.
|
REPLACE BLIND SPOT MONITOR SENSOR RH (A)
|
(a) Replace the blind spot monitor sensor RH (A).
HINT:
Click here
NEXT
|
|
|
(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
|
20.
|
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - BODY GROUND)
|
Click here
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
21.
|
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH (A) - POWER SOURCE)
|
Click here
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
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
|
NG
|
|
|
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
|
NG |
|
REPAIR OR REPLACE CAN BUS WIRES OR CONNECTOR
|
|