Code No. C2226
BSW switch
OPERATION
The clearance warning control unit sets diagnosis code No. C2226 when it receives blind
spot warning switch ON-signal for at least one minute, or when it detects any open circuit or
short to earth in the blind spot warning indicator circuit while the sonar switch indicator
is deactivated.
TROUBLE JUDGEMENT
Any of the conditions below is satisfied:
- The blind spot warning switch signal remains ON for at least one minute.
- The system detects a malfunction for at least three seconds when the blind spot
warning switch indicator is deactivated.
PROBABLE CAUSES
- Malfunction of blind spot warning switch
- Malfunction of clearance warning control unit
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list.
Check the input signal (Refer to 
).
- Operate the blind spot warning switch.
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Item No.
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Item name
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Normal condition
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17
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BSW SW indicator
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Normal
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78
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BSW switch input signal
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When the switch is operated: ON
When the switch is not operated: OFF
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OK: Normal condition is displayed.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
NO (Normal condition is not displayed for item No. 78)
: Go to Step 2.
NO (Normal condition is not displayed for item No. 17) : Go to Step 5.
STEP 2. Check the blind spot warning switch.
Refer to .
Q.
Is the check result normal?
Go to Step 3.
Replace the blind spot warning switch (Refer to ).
STEP 3. Check of short to earth circuit in BSW line between the blind
spot warning switch connector and clearance warning control unit connector.
Q.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
STEP 4. M.U.T.-III data list.
Check the input signal (Refer to ).
- Operate the blind spot warning switch.
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|
Item No.
|
Item name
|
Normal condition
|
78
|
BSW switch input signal
|
When the switch is operated: ON
When the switch is not operated: OFF
|
|
OK: Normal condition is displayed.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the clearance warning control unit (Refer to ).
STEP 5. Voltage measurement at blind spot warning switch connector
(power supply terminal).
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check the voltage between the blind spot warning switch connector (power supply
terminal) and body earth.
OK: System voltage
|
Q.
Is the check result normal?
Go to Step 7.
Go to Step 6.
STEP 6. Check of short to earth, and open circuit in power supply
line between the ignition switch (IG1) and blind spot warning switch connector.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
STEP 7. Check the blind spot warning switch indicator.
Refer to .
Q.
Is the check result normal?
Go to Step 8.
Replace the blind spot warning switch (Refer to ).
STEP 8. Check of short to earth, and open circuit in BIND line between
the blind spot warning switch connector and clearance warning control unit connector.
Q.
Is the check result normal?
Go to Step 9.
Repair the connector(s) or wiring harness.
STEP 9. M.U.T.-III data list.
Check the input signal (Refer to ).
|
|
Item No.
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Item name
|
Normal condition
|
17
|
BSW SW indicator
|
Normal
|
|
OK: Normal condition is displayed.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the clearance warning control unit (Refer to ).