DTC Troubleshooting: B1241 (59)
DTC B1241 or indicator 59: A Problem in the Blower Motor Circuit
DTC Description
DTC
B1241 A Problem in the Blower Motor Circuit
  

1.
Problem verification:

Problem verification
?1.
Clear the DTC with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

?3.
Do the Self-Diagnostic Function with the HDS or the climate control unit.

?4.
Check for DTCs.
DTC Description
DTC
B1241 A Problem in the Blower Motor Circuit
  

Is DTC B1241 or 59 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
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. D3 (30 A)
Location
Auxiliary under-dash fuse box

Is the fuse OK?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Replace the fuse, and recheck. If fuse blows again, repair a short in the No. D3 (30 A) fuse circuit.?
3.
Blower motor power circuit check:

Blower motor power circuit check
?1.
Disconnect the following connector.
Blower motor 2P connector

?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 No. 2
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Go to step 12.
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 No. 1
Terminal B
Body ground


?4.
Turn the vehicle to the ON mode.

Does the blower motor run at high speed?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
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

?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 No. 2
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The GND wire is OK. Go to step 6.
     
NO
     
     
     
Check for an open in the wire between the power transistor and body ground. If the wire is OK, check for poor ground at G403.?
6.
Open wire check (BLOWER MTR line):

Open wire check (BLOWER MTR line)
?1.
Connect terminals A and B with a jumper wire.
Terminal A
Power transistor 4P connector No. 1
Terminal B
Power transistor 4P connector No. 2


?2.
Turn the vehicle to the ON mode.

Does the blower motor run at high speed?

     
YES
     
     
     
The BLOWER MTR wire is OK. Go to step 7.
     
NO
     
     
     
Repair an open in the wire between the power transistor and the blower motor.?
7.
Shorted wire check (BLOWER V/BLW-V line):

Shorted wire check (BLOWER V/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 32P connector

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit 32P connector: disconnected
Power transistor 4P connector: disconnected
Test point 1
Climate control unit 32P connector No. 3
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire between the climate control unit and the power transistor.?
     
NO
     
     
     
The BLOWER V/BLW-V wire is not shorted. Go to step 8.
8.
Shorted wire check (BLOWER G/BLW-G line):

Shorted wire check (BLOWER G/BLW-G line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit 32P connector: disconnected
Power transistor 4P connector: disconnected
Test point 1
Climate control unit 32P connector No. 4
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire between the climate control unit and the power transistor.?
     
NO
     
     
     
The BLOWER G/BLW-G wire is not shorted. Go to step 9.
9.
Open wire check (BLOWER V/BLW-V line):

Open wire check (BLOWER V/BLW-V line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit 32P connector: disconnected
Power transistor 4P connector: disconnected
Test point 1
Climate control unit 32P connector No. 3
Test point 2
Power transistor 4P connector No. 3


Is there continuity?

     
YES
     
     
     
The BLOWER V/BLW-V wire is OK. Go to step 10.
     
NO
     
     
     
Repair an open in the wire between the climate control unit and the power transistor.?
10.
Open wire check (BLOWER G/BLW-G line):

Open wire check (BLOWER G/BLW-G line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit 32P connector: disconnected
Power transistor 4P connector: disconnected
Test point 1
Climate control unit 32P connector No. 4
Test point 2
Power transistor 4P connector No. 4


Is there continuity?

     
YES
     
     
     
The BLOWER G/BLW-G wire is OK. Go to step 11.
     
NO
     
     
     
Repair an open in the wire between the climate control unit and the power transistor.?
11.
Power transistor check:

Power transistor check
?1.
Test the power transistor.

Is the power transistor OK?

     
YES
     
     
     
     
NO
     
     
     
NOTE: If the power transistor is faulty, check the blower motor for damage. If necessary, replace the blower motor.
12.
Blower motor relay check:

Blower motor relay check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Remove the blower motor relay from the under-dash relay holder A, and test it.

Is the relay OK?

     
YES
     
     
     
Go to step 13.
     
NO
     
     
     
Replace the 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
Blower motor relay: disconnected
Test point 1
Blower motor relay 4P socket No. 1
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The +B HTR MTR line is OK. Go to step 14.
     
NO
     
     
     
Repair an open in the wire between the No. D3 (30 A) fuse in the auxiliary under-dash fuse box and the blower motor relay.?
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
Blower motor relay: disconnected
Test point 1
Blower motor relay 4P socket No. 7
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
The IG2 A/C wire is OK. Go to step 15.
     
NO
     
     
     
Repair an open in the wire between the No. C24 (7.5 A) fuse in the under-dash fuse/relay box and the blower motor relay. If wire is OK, replace the under-dash fuse/relay box.?
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
Blower motor relay: disconnected
Test point 1
Blower motor relay 4P socket No. 8
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair an open in the wire between the blower motor relay and the blower motor.?
     
NO
     
     
     
Check for an open in the wire between the blower motor relay and body ground. If the wire is OK, check for poor ground at G403.?