DTC Troubleshooting: B1241 (D-A1), B1241 (59)
DTC B1241 or DTC screen D-A1 or DTC indicator 59: A problem in the blower motor circuit
DTC Description |
DTC |
B1241 A problem in the blower motor circuit |
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1. |
Problem verification:
Problem verification
?1. |
Clear the DTC with the HDS.
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?2. |
Turn the vehicle to the OFF (LOCK) mode and then the ON mode. |
?4. |
Check for DTCs.
DTC Description |
DTC |
B1241 A problem in the blower motor circuit |
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Is DTC B1241 or Error on the DTC screen D-A1 (climate control panel without display) or 59 (climate control panel with display) indicated?
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Intermittent failure. Check for loose wires or poor connections on the blower motor circuit.? |
2. |
Fuse check:
Fuse check
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Check the following fuse.
Fuse |
No. A3-1 (40 A) |
Location |
Under-hood fuse/relay box | |
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Is the fuse OK?
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Replace the fuse, and recheck. If fuse blows again, repair a short in the No. A3-1 (40 A) fuse circuit.? |
3. |
Blower motor power circuit check:
Blower motor power circuit check
?1. |
Disconnect the following connector.
Blower motor 2P connector | |
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?2. |
Turn the vehicle to the ON mode. |
?3. |
Measure the voltage between test points 1 and 2.
Test condition |
Vehicle ON mode |
Blower motor 2P connector: disconnected |
Test point 1 |
Blower motor 2P connector (female terminals) No. 2:  |
Test point 2 |
Body ground | |
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Is there battery voltage?
4. |
Blower motor operation check:
Blower motor operation check
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Reconnect the blower motor 2P connector. |
?3. |
Connect terminals A and B with a jumper wire.
Terminal A |
Blower motor 2P connector (female terminals) No. 1:  |
Terminal B |
Body ground | |
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?4. |
Turn the vehicle to the ON mode. | |
Does the blower motor run at high speed?
5. |
Open wire check (GND line):
Open wire check (GND line)
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Disconnect the jumper wire. |
?3. |
Disconnect the following connector.
Power transistor 4P connector | |
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?4. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode |
Power transistor 4P connector: disconnected |
Test point 1 |
Power transistor 4P connector (female terminals) No. 2:  |
Test point 2 |
Body ground | |
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Is there continuity?
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The GND wire is OK. Go to step 6. |
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Check for an open in the GND wire. If the wire is OK, check for poor ground at G251.? |
6. |
Open wire check (BLW-M line):
Open wire check (BLW-M line)
?1. |
Connect terminals A and B with a jumper wire.
Terminal A |
Power transistor 4P connector (female terminals) No. 1:  |
Terminal B |
Power transistor 4P connector (female terminals) No. 2:  | |
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?2. |
Turn the vehicle to the ON mode. | |
Does the blower motor run at high speed?
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The BLW-M wire is OK. Go to step 7. |
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Repair an open in the BLW-M wire.? |
7. |
Shorted wire check (BLW-V line):
Shorted wire check (BLW-V line)
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Disconnect the jumper wire. |
?3. |
Disconnect the following connector.
Climate control unit connector B (24P) | |
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?4. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode |
Climate control unit connector B (24P): disconnected |
Power transistor 4P connector: disconnected |
Test point 1 |
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Test point 2 |
Body ground | |
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Is there continuity?
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Repair a short to ground in the BLW-V wire.? |
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The BLW-V wire is not shorted. Go to step 8. |
8. |
Shorted wire check (BLW-G line):
Shorted wire check (BLW-G line)
?1. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode |
Climate control unit connector B (24P): disconnected |
Power transistor 4P connector: disconnected |
Test point 1 |
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Test point 2 |
Body ground | |
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Is there continuity?
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Repair a short to ground in the BLW-G wire.? |
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The BLW-G wire is not shorted. Go to step 9. |
9. |
Open wire check (BLW-V line):
Open wire check (BLW-V line)
?1. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode |
Climate control unit connector B (24P): disconnected |
Power transistor 4P connector: disconnected |
Test point 1 |
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Test point 2 |
Power transistor 4P connector (female terminals) No. 3:  | |
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Is there continuity?
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The BLW-V wire is OK. Go to step 10. |
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Repair an open in the BLW-V wire.? |
10. |
Open wire check (BLW-G line):
Open wire check (BLW-G line)
?1. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode |
Climate control unit connector B (24P): disconnected |
Power transistor 4P connector: disconnected |
Test point 1 |
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Test point 2 |
Power transistor 4P connector (female terminals) No. 4:  | |
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Is there continuity?
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The BLW-G wire is OK. Go to step 11. |
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Repair an open in the BLW-G wire.? |
11. |
Power transistor check:
Power transistor check
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Is the power transistor OK?
12. |
Front blower motor relay check:
Front blower motor relay check
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Remove the front blower motor relay from the under-hood fuse/relay box, and test it. | |
Is the relay OK?
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Replace the front blower motor relay.? |
13. |
Open wire check (+B HTR MTR line):
Open wire check (+B HTR MTR line)
?1. |
Measure the voltage between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode |
Front blower motor relay: disconnected |
Test point 1 |
Front blower motor relay 4P socket (female terminals) No. 1:  |
Test point 2 |
Body ground | |
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Is there battery voltage?
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The +B HTR MTR wire is OK. Go to step 14. |
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Repair an open in the +B HTR MTR wire.? |
14. |
Open wire check (IG2 A/C line):
Open wire check (IG2 A/C line)
?1. |
Turn the vehicle to the ON mode. |
?2. |
Measure the voltage between test points 1 and 2.
Test condition |
Vehicle ON mode |
Front blower motor relay: disconnected |
Test point 1 |
Front blower motor relay 4P socket (female terminals) No. 3:  |
Test point 2 |
Body ground | |
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Is there battery voltage?
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The IG2 A/C wire is OK. Go to step 15. |
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Repair an open in the IG2 A/C wire.? |
15. |
Open wire check (GND line):
Open wire check (GND line)
?1. |
Turn the vehicle to the OFF (LOCK) mode. |
?2. |
Check for continuity between test points 1 and 2.
Test condition |
Vehicle OFF (LOCK) mode |
Front blower motor relay: disconnected |
Test point 1 |
Front blower motor relay 4P socket (female terminals) No. 4:  |
Test point 2 |
Body ground | |
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Is there continuity?
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Repair an open in the BLOWER MTR wire.? |
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Check for an open in the GND wire. If the wire is OK, check for poor ground at G351.? | |