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(#'
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µ
µ µ
µ
YES
NO YES
NO
DTC B1235 or DTC indicator L:
21-4221-42Climate Control
DTC Troubleshooting (cont’d)
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
BLK
GRY
11. Turn the ignition switch to ON (II), and measure thesame terminals for voltage to body ground.
Repair short to power in the wire(s) between
the climate control unit and the air mix control
motor. This short may also damage the climate
control unit. Repair the short to power before
replacing the climate control unit.
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit. 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the air mix control motor 7P connector.
7. Disconnect the climate control unit 32P connector.A Problem in
the Air Mix Control Linkage, Door, or Motor
Wire side of female terminals
I s t her e any v ol t age? I s DT C B1235 or L i nd i cat ed ?
08/08/21 14:42:19 61SNR030_210_0043
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DYNOMITE -2009-
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YES
NO YES
NO
YES
NO
21-43
AIR MIX CONTROL MOTOR 7P CONNECTORPNK
LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
LT BLU
PNK LT BLU
PNK
CLIMATE CONTROL UNIT 32P CONNECTOR
8. Check for continuity between the following
terminals of the climate control unit 32P connector
and the air mix control motor 7P connector.
32P: 7P:
No. 9 No. 2
No. 11 No. 1
Go to step 9.
Repair open in the wire(s) between the
climate control unit and the air mix control
motor. 9. Check for continuity between body ground and the
climate control unit 32P connector terminals No. 9
and No. 11 individually.
Repair short to body ground in the wire(s)
between the climate control unit and the air mix
control motor.
Go to step 10.
10. Test the air mix control motor (see page 21-72).
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Replace the air mix control motor (see page
21-72), or repair the air mix control linkage or
door.
Wire side of female terminals Wire side of female terminals
Wire side of female terminals
Is there continuity?Is there continuity?
I s t he ai r mi x cont r ol mot or OK ?
08/08/21 14:42:20 61SNR030_210_0044
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DYNOMITE -2009-
Page 1923 of 2893

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DTC B1239 or DTC indicator M:
YES
NO
YES
NO YES
NO
21-44Climate Control
DTC Troubleshooting (cont’d)
MODE CONTROL MOTOR 7P CONNECTOR
BLU
PUR ORN
LT GRN
RED
PUR
BLU RED
ORN
LT GRN
CLIMATE CONTROL UNIT 32P CONNECTOR
An Open or
Short in the Mode Control Motor Circuit
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the mode control motor
circuit.
5. Turn the ignition switch to LOCK (0).
6. Test the mode control motor (see page 21-73).
Go to step 7.
Replace the mode control motor (see page
21-73).
7. Disconnect the mode control motor 7P connector.
8. Disconnect the climate control unit 32P connector. 9. Check for continuity between the following
terminals of the climate control unit 32P connector
and the mode control motor 7P connector.
32P: 7P:
No. 19 No. 7
No. 20 No. 3
No. 21 No. 4
No. 22 No. 5
No. 23 No. 6
Go to step 10.
Repair open in the wire(s) between the
climate control unit and the mode control motor.
Wire side of female terminals Wire side of female terminals
I s DT C B1239 or M i nd i cat ed ?
I s t he mod e cont r ol mot or OK ? Is there continuity?
08/08/21 14:42:20 61SNR030_210_0045
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DYNOMITE -2009-
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21-45
RED
ORN
BLU PURLT GRN
CLIMATE CONTROL UNIT 32P CONNECTOR
REDORN
BLU PURLT GRN
CLIMATE CONTROL UNIT 32P CONNECTOR
10. Check for continuity between body ground and the
climate control unit 32P connector terminals
No. 19, 20, 21, 22, and No. 23 individually.
Repair short to body ground in the wire(s)
between the climate control unit and the mode
control motor.
Go to step 11.
11. Check for continuity between the climate control unit 32P connector terminals as follows.
From terminal To terminals 19 20, 21, 22, 23
20 21, 22, 23
21 22, 23
22 23
Repair the short in the wires.
Go to step 12. 12. Turn the ignition switch to ON (II), and measure the
same terminals for voltage to body ground.
Repair short to power in the wire(s) between
the climate control unit and the mode control motor.
This short may also damage the climate control
unit. Repair the short to power before replacing the
climate control unit.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
mode control motor 7P connector. If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.
Wire side of female terminals Wire side of female terminals
Is there continuity?
I s t her e cont i nui t y bet w een any of t he t er mi nal s? I s t her e any v ol t age?
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DTC B1240 or DTC indicator N:
YES
NO
YES
NO
21-46Climate Control
DTC Troubleshooting (cont’d)
CLIMATE CONTROL UNIT 32P CONNECTOR
GRN
WHT
MODE CONTROL MOTOR 7P CONNECTOR WHT
GRN
A Problem in
the Mode Control Linkage, Doors, or Motor
1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the mode control motor 7P connector.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between the following
terminals of climate control unit 32P connector and
the mode control motor 7P connector.
32P: 7P:
No. 10 No. 1
No. 12 No. 2
Go to step 9.
Repair open in the wire(s) between the
climate control unit and the mode control motor.
Wire side of female terminals
Wire side of female terminals
I s DT C B1240 or N i nd i cat ed ?
Is there continuity?
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YES
NO
YES
NO YES
NO
YES
NO
DTC B1241 or DTC indicator P:
21-4721-47
WHT
GRN
CLIMATE CONTROL UNIT 32P CONNECTOR
BLOWER MOTOR 2P CONNECTORJUMPER WIRE GRN
9. Check for continuity between body ground and theclimate control unit 32P connector terminals No. 10
and No. 12 individually.
Repair short to body ground in the wire(s)
between the climate control unit and the mode
control motor.
Go to step 10.
10. Test the mode control motor (see page 21-73).
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Replace the mode control motor (see page
21-73), or repair the mode control linkage or
doors. 1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn
to ON (II).
3. Do the self-diagnostic with the HDS (see page 21-10) or climate control unit (see page 21-11).
4. Check for DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the blower motor circuit.
5. Turn the ignition switch to LOCK (0).
6. Check the No. 9 (40 A) fuse in the under-hood fuse/relay box, and the No. 36 (10 A) fuse in the
under-dash fuse/relay box.
Go to step 7.
Replace the fuses, and recheck. If the fuses
blow again, check for a short in the No. 9 (40 A) and
No. 36 (10 A) fuses circuit.
7. Connect the blower motor 2P connector terminal No. 2 to body ground with a jumper wire.
(cont’d)A Problem in
the Blower Motor Circuit
Wire side of female terminals
Wire side of female terminals
Is there continuity?I s t he mod e cont r ol mot or OK ? I s DT C B1241 or P i nd i cat ed ?
Ar e t he f uses OK ?
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NO
YES
NO
YES
NO
21-48Climate Control
DTC Troubleshooting (cont’d)
POWER TRANSISTOR 4P CONNECTOR
BLK
POWER TRANSISTOR 4P CONNECTOR BLKJUMPER WIRE
GRN
BLU
YEL
CLIMATE CONTROL UNIT 32P CONNECTOR
8. Turn the ignition switch to ON (II).
Go to step 9.
Go to step 24.
9. Turn the ignition switch to LOCK (0).
10. Disconnect the jumper wire.
11. Disconnect the power transistor 4P connector.
12. Check for continuity between the power transistor 4P connector terminal No. 2 and body ground.
Go to step 13.
Check for an open in the wire between the
power transistor and body ground. If the wire is OK,
check for poor ground at G401 (see page 22-64).
13. Connect the power transistor 4P connector terminals No. 2 and No. 4 with a jumper wire. 14. Turn the ignition switch to ON (II).
Go to step 15.
Repair open in the GRN wire between the
power transistor and the blower motor.
15. Turn the ignition switch to LOCK (0).
16. Disconnect the jumper wire.
17. Disconnect the climate control unit 32P connector.
18. Check for continuity between body ground and the climate control unit 32P connector terminals No. 13
and No. 14 individually.
Repair short to body ground in the wire(s)
between the climate control unit and the power
transistor.
Go to step 19.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Does t he bl ow er mot or r un?
Is there continuity? Does t he bl ow er mot or r un at hi gh speed ?
Is there continuity?
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YES
NO YES
NO
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YES
NO
21-49
BLU
YEL
BLU YEL
POWER TRANSISTOR 4P CONNECTOR
CLIMATE CONTROL UNIT 32P CONNECTOR
BLU
YEL
CLIMATE CONTROL UNIT 32P CONNECTOR
BLOWER MOTOR 2P CONNECTOR
WHT
19. Check for continuity between the followingterminals of the climate control unit 32P connector
and the power transistor 4P connector.
32P: 4P:
No. 13 No. 1
No. 14 No. 3
Go to step 20.
Repair open in the wire(s) between the
climate control unit and the power transistor.
20. Turn the ignition switch to ON (II).
21. Measure the voltage between body ground and the climate control unit 32P connector terminals No. 13
and No. 14 individually.
Repair short to power in the wire(s).
Go to step 22. 22. Reconnect the climate control unit 32P connector.
23. Test the power transistor (see page 21-71).
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
power transistor 4P connector. If the connections
are good, substitute a known-good climate control
unit, and recheck. If the symptom/indication goes
away, replace the original climate control unit.
Replace the power transistor.
24. Disconnect the jumper wire.
25. Disconnect the blower motor 2P connector.
26. Measure the voltage between the blower motor 2P connector terminal No. 1 and body ground.
Replace the blower motor.
Go to step 27.
27. Turn the ignition switch to LOCK (0).
28. Remove the blower motor relay from the under- hood fuse/relay box, and test it (see page 22-70).
Go to step 29.
Replace the blower motor relay.
(cont’d)
Wire side of female terminalsWire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is there continuity?
Is there voltage? Is the power transistor OK ?
Is there battery voltage?Is the relay OK ?
08/08/21 14:42:22 61SNR030_210_0050
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