Toyota Camry (XV70): Lost Communication with Blind Spot Monitor Slave Module (U0232)
DESCRIPTION
This DTC is stored when the blind spot monitor sensor RH judges that there is a communication problem with the blind spot monitor sensor LH.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|---|---|---|---|
|
U0232 | Lost Communication with Blind Spot Monitor Slave Module |
The blind spot monitor sensor (master) cannot receive signals from the blind spot monitor sensor (slave) |
|
WIRING DIAGRAM
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 engine 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 (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
- After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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HINT:
- Operating the engine 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 |
|---|---|
|
w/ Parking Support Brake System |
A |
| w/o Parking Support Brake System |
B |
| B |
.gif) | GO TO STEP 3 |
|
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| 2. |
CHECK DTC OUTPUT (PARKING SUPPORT BRAKE SYSTEM) |
(a) Using the Techstream, check for DTCs according to the prompts on the screen.
Body Electrical > Clearance Warning > Trouble CodesStandard:
The clearance warning ECU assembly does not output DTCs U117787 and U117887 simultaneously.
| NG | | GO TO PARKING SUPPORT BRAKE SYSTEM (DTC U117787) |
|
| 3. |
CHECK CAN BUS MAIN WIRE |
(a) Turn the engine switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
(d) Reconnect the cable to the negative (-) battery terminal.
|
Result | Proceed to |
|---|---|
|
OK | A |
|
Open circuit in CAN main bus lines |
B |
| Short circuit between bus lines |
C |
| D |
| B |
| GO TO STEP 7 |
| C |
| GO TO STEP 10 |
| D |
| GO TO STEP 13 |
|
| 4. |
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BODY GROUND) |
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| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 5. |
CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - POWER SOURCE) |
Click here
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. |
CHECK DTC |
(a) Turn the engine switch off.
(b) Turn the engine switch on (IG).
(c) Check for DTCs.
Body Electrical > Blind Spot Monitor Master > Trouble CodesOK:
No DTCs are output.
| OK | |
SYMPTOM SIMULATION |
| NG | | REPLACE BLIND SPOT MONITOR SENSOR LH |
| 7. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 5 JUNCTION CONNECTOR) |
| (a) Disconnect the R100 No. 5 junction connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
R100-3 (CANH) - R100-14(CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
|
R100-2 (CANH) - R100-13(CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
|
Result | Proceed to |
|---|---|
|
OK | A |
|
NG (to blind spot monitor sensor RH CAN main wire) |
B |
| NG (to blind spot monitor sensor LH CAN main wire) |
C |
| A |
| REPLACE NO. 5 JUNCTION CONNECTOR |
| C |
| GO TO STEP 9 |
|
| 8. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH) |
(a) Reconnect the R100 No. 5 junction connector.
| (b) Disconnect the W5 blind spot monitor sensor RH connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
W5-1 (CA2P) - W5-6 (CA2N) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK | | REPLACE BLIND SPOT MONITOR SENSOR RH |
| NG | | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 5 JUNCTION CONNECTOR) |
| 9. |
CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH) |
(a) Reconnect the R100 No. 5 junction connector.
| (b) Disconnect the W6 blind spot monitor sensor LH connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
W6-1 (CA2P) - W6-6 (CA2N) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK | | REPLACE BLIND SPOT MONITOR SENSOR LH |
| NG | | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 5 JUNCTION CONNECTOR) |
| 10. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR) |
| (a) Disconnect the R100 No. 5 junction connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
R100-3 (CANH) - R100-14 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
|
R100-1 (CANH) - R100-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
|
Result | Proceed to |
|---|---|
|
OK | A |
|
NG (to blind spot monitor sensor RH CAN main wire) |
B |
| NG (to blind spot monitor sensor LH CAN main wire) |
C |
| A |
| REPLACE NO. 5 JUNCTION CONNECTOR |
| C |
| GO TO STEP 12 |
|
| 11. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) |
(a) Reconnect the R100 No. 5 junction connector.
| (b) Disconnect the W5 blind spot monitor sensor RH connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
W5-1 (CA2P) - W5-6 (CA2N) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK | | REPLACE BLIND SPOT MONITOR SENSOR RH |
| NG | | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 5 JUNCTION CONNECTOR) |
| 12. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) |
(a) Reconnect the R100 No. 5 junction connector.
| (b) Disconnect the W6 blind spot monitor sensor LH connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
W6-1 (CA2P) - W6-6 (CA2N) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
| OK | | REPLACE BLIND SPOT MONITOR SENSOR LH |
| NG | | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 5 JUNCTION CONNECTOR) |
| 13. |
CHECK FOR SHORT IN CAN BUS WIRES (NO. 5 JUNCTION CONNECTOR) |
(a) Disconnect the R100 No. 5 junction connector.
(b) Measure the resistance according to the value(s) in the table below.
|
*1 | DLC3 |
- | - |
|
*a | Front view of wire harness connector (to No. 5 Junction Connector) |
*b | to blind spot monitor sensor RH CAN main wire |
|
*c | to blind spot monitor sensor LH CAN main wire |
- | - |
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
R100-3 (CANH) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
R100-14 (CANL) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
R100-3 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
R100-14 (CANL) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
R100-2 (CANH) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
R100-13 (CANL) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
R100-2 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
R100-13 (CANL) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
Result | Proceed to |
|---|---|
|
OK | A |
|
NG (to blind spot monitor sensor RH CAN main wire) |
B |
| NG (to blind spot monitor sensor LH CAN main wire) |
C |
| A |
| REPLACE NO. 5 JUNCTION CONNECTOR |
| C |
| GO TO STEP 15 |
|
| 14. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH) |
(a) Reconnect the R100 No. 5 junction connector.
(b) Disconnect the W5 blind spot monitor sensor RH connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | | REPLACE BLIND SPOT MONITOR SENSOR RH |
| NG | | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - NO. 5 JUNCTION CONNECTOR) |
| 15. |
CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH) |
(a) Reconnect the R100 No. 5 junction connector.
(b) Disconnect the W6 blind spot monitor sensor LH connector.
| (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | | REPLACE BLIND SPOT MONITOR SENSOR LH |
| NG | | REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - NO. 5 JUNCTION CONNECTOR) |
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WIRING DIAGRAM
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 be
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