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µ
µ
µ
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µ
DTC B1202 or DTC indicator C and AUTO: DTC B1205, DTC indicator J and AUTO or L and AUTO:
DTC B1206 or DTC indicator F and AUTO:
DTC B1207 or DTC indicator D and AUTO:
YES
NO
YES
NO
YES
NO
21-2821-28Climate Control
DTC Troubleshooting
Climate Control Unit Internal Error
Climate Control Unit Lost
Communication with Gauge Control Module
(TACH) (VSP/NE message)
Climate Control Unit Lost Communication
with Gauge Control Module (TACH) (ECT
message)
Climate Control Unit Lost Communication
with Gauge Control Module (TACH) (ILLUMI
message)
NOTE: Check the battery condition (see page 22-67) and
the charging system (see page 4-26).
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.
The climate control unit is faulty, replace the
climate control unit.
Intermittent failure, the climate control unit is
OK at this time. 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 the DTCs.
Go to step 5.
Intermittent failure, check for loose wires or
poor connections on the gauge control module
(TACH) and climate control unit circuit.
5. Select UNIT INFORMATION in the BODY ELECTRICAL menu.
6. Select CONNECTED UNIT in the UNIT INFORMATION menu.
Substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.
Go to step 7.
7. Turn the ignition switch to LOCK (0).
I s DT C B1202 or C and AU T O i nd i cat ed ?
I s DT C B1205 , J and AU T O or L and AU T O, and /or DT C B1206 or F and AU T O, and / or DT C B1207or D and AU T O i nd i cat ed ?
I s gauge cont r ol mod ul e d et ect ed ?
08/08/21 14:41:04 61SNR030_210_0029
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YES
NO YES
NO
YES
NO
DTC B1220 or DTC indicator E and AUTO:
21-2921-29
GAUGE CONTROL MODULE (TACH) 36P CONNECTOR
UNDER-DASH FUSE/RELAY BOX CONNECTOR Q (16P)
PNK
PNK
8. Disconnect under-dash fuse/relay box connector Q (16P).
9. Disconnect the gauge control module (TACH) 36P connector.
10. Check for continuity between under-dash fuse/relay box connector Q (16P) terminal No. 6 and the
gauge control module (TACH) 36P connector
terminal No. 21.
Go to the gauge control module input test
(see page 22-271).
Repair open in the wire between the MICU
and the gauge control module (TACH). 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. Test the recirculation control motor (see page 21-74).
Go to step 7.
Replace the recirculation control motor
(see page 21-74).
7. Disconnect the recirculation control motor 7P connector (see page 21-74).
8. Disconnect the climate control unit 32P connector.
(cont’d)
A Short in the Recirculation Control Motor
Circuit
Wire side of female terminals Wire side of female terminals
Is there continuity? I s DT C B1220 or E and AU T O i nd i cat ed ?
I s t he r eci r cul at i on cont r ol mot or OK ?
08/08/21 14:41:05 61SNR030_210_0030
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DTC B1225 or DTC indicator A:
YES
NO
YES
NO YES
NO
YES
NO
21-31
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR
LT BLU LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR RED
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
An Open in
the In-car Temperature Sensor 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 in-car temperature sensor
circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the in-car temperature sensor (see page 21-67), and test it (see page 21-67).
Go to step 7.
Replace the in-car temperature sensor.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between the climate control
unit 32P connector terminal No. 26 and the in-car
temperature sensor 2P connector terminal No. 1.
Go to step 9.
Repair open in the wire between the climate
control unit and the in-car temperature sensor.
9. Check for continuity between the climate control unit 32P connector terminal No. 19 and the in-car
temperature sensor 2P connector terminal No. 2.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
outside air temperature sensor 2P 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.
Repair open in the wire between the climate
control unit and the in-car temperature sensor.
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
I s DT C B1225 or A i nd i cat ed ?
Is t he i n-car t emper at ur e sensor OK ? Is there continuity?
Is there continuity?
08/08/21 14:42:15 61SNR030_210_0032
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DTC B1226 or DTC indicator B:
YES
NO
YES
NO YES
NO
YES
NO
21-32Climate Control
DTC Troubleshooting (cont’d)
LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
RED LT BLU
CLIMATE CONTROL UNIT 32P CONNECTOR
A Short in the
In-car Temperature Sensor 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.
5. Turn the ignition switch to LOCK (0).
6. Remove the in-car temperature sensor (see page 21-67), and test it (see page 21-67).
Go to step 7.
Replace the in-car temperature sensor.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between body ground and the
climate control unit 32P connector terminal No. 26.
Repair short to body ground in the wire
between the climate control unit and the in-car
temperature sensor.
Go to step 9.
9. Check for continuity between the climate control unit 32P connector terminals No. 19 and No. 26.
Repair short in the wires between the climate
control unit and the in-car temperature sensor.
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
I s DT C B1226 or B i nd i cat ed ?
Is t he i n-car t emper at ur e sensor OK ? Is there continuity?
Is there continuity?
08/08/21 14:42:16 61SNR030_210_0033
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DTC B1227 or DTC indicator C:
YES
NO
YES
NO YES
NO
21-33
YEL
OUTSIDE AIR TEMPERATURE SENSOR 2P CONNECTOR CLIMATE CONTROL UNIT 32P CONNECTOR
BLU
An Open in
the Outside Air Temperature Sensor 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 outside air temperature
sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Remove the outside air temperature sensor (see page 21-68), and test it (see page 21-68).
Go to step 7.
Replace the outside air temperature sensor.
7. Disconnect the climate control unit 32P connector. 8. Check for continuity between the climate control
unit 32P connector terminal No. 25 and the outside
air temperature sensor 2P connector terminal No. 1.
Go to step 9.
Repair open in the wire between the climate
control unit and the outside air temperature
sensor.
(cont’d)
Wire side of female terminalsWire side of female terminals
I s DT C B1227 or C i nd i cat ed ?
Is t he out si d e ai r t emper at ur e sensor OK ? Is there continuity?
08/08/21 14:42:16 61SNR030_210_0034
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NO YES
NO
YES
NO
DTC B1228 or DTC indicator D:
21-3421-34Climate Control
DTC Troubleshooting (cont’d)
PNK
OUTSIDE AIR TEMPERATURE SENSOR 2P CONNECTOR RED
CLIMATE CONTROL UNIT 32P CONNECTOR
9. Check for continuity between the climate control
unit 32P connector terminal No. 19 and the outside
air temperature sensor 2P connector terminal No. 2.
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
outside air temperature sensor 2P 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.
Repair open in the wire between the climate
control unit and the outside air temperature
sensor. 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. Remove the outside air temperature sensor (see page 21-68), and test it (see page 21-68).
Go to step 7.
Replace the outside air temperature sensor.
7. Disconnect the climate control unit 32P connector.A Short in the
Outside Air Temperature Sensor Circuit
Wire side of female terminals
Wire side of female terminals
Is there continuity?
I s DT C B1228 or D i nd i cat ed ?
Is t he out si d e ai r t emper at ur e sensor OK ?
08/08/21 14:42:16 61SNR030_210_0035
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NO
YES
NO YES
NO
YES
NO
DTC B1229 or DTC indicator E:
21-3521-35
CLIMATE CONTROL UNIT 32P CONNECTOR
BLU
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
BLU
SUNLIGHT SENSOR 2P CONNECTORPUR
PUR
CLIMATE CONTROL UNIT 32P CONNECTOR
8. Check for continuity between body ground and the
climate control unit 32P connector terminal No. 25.
Repair short to body ground in the wire
between the climate control unit and the outside air
temperature sensor.
Go to step 9.
9. Check for continuity between the climate control unit 32P connector terminals No. 19 and No. 25.
Repair short in the wires between the climate
control unit and the outside air temperature
sensor.
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, check for loose wires or
poor connections on the sunlight sensor circuit.
5. Turn the ignition switch to LOCK (0).
6. Disconnect the sunlight sensor 2P connector.
7. Disconnect the climate control unit 32P connector.
8. Check for continuity between the climate control unit 32P connector terminal No. 24 and the sunlight
sensor 2P connector terminal No. 2.
Go to step 9.
Repair open in the wire between the climate
control unit and the sunlight sensor.
(cont’d)An Open in
the Sunlight Sensor Circuit
Wire side of female terminals
Wire side of female terminals
Wire side of female terminalsWire side of female terminals
Is there continuity?
Is there continuity? I s DT C B1229 or E i nd i cat ed ?
Is there continuity?
08/08/21 14:42:17 61SNR030_210_0036
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NO
YES
NO
YES
NO
YES
NO
DTC B1230 or DTC indicator F:
21-3621-36Climate Control
DTC Troubleshooting (cont’d)
SUNLIGHT SENSOR 2P CONNECTOR
RED
RED
CLIMATE CONTROL UNIT 32P CONNECTOR
PUR
CLIMATE CONTROL UNIT 32P CONNECTOR
9. Check for continuity between the climate control
unit 32P connector terminal No. 19 and the sunlight
sensor 2P connector terminal No. 1.
Go to step 10.
Repair open in the wire between the climate
control unit and the sunlight sensor.
10. Reconnect the sunlight sensor 2P connector.
11. Reconnect the climate control unit 32P connector.
12. Test the sunlight sensor (see page 21-69).
Check for loose wires or poor connections at
the climate control unit 32P connector and at the
sunlight sensor 2P 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 sunlight sensor (see page 21-69). 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 sunlight sensor 2P connector.
7. Disconnect the climate control unit 32P connector.
8. Check for continuity between body ground and the climate control unit 32P connector terminal No. 24.
Repair short to body ground in the wire
between the climate control unit and the sunlight
sensor.
Go to step 9.A Short in the
Sunlight Sensor Circuit
Wire side of female terminals
Wire side of female terminals
Wire side of female terminals
Is there continuity?I s t he sunl i ght sensor OK ? I s DT C B1230 or F i nd i cat ed ?
Is there continuity?
08/08/21 14:42:17 61SNR030_210_0037
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