Honda Ridgeline. Manual — part 416
SJC8AH7K711000Y1202FAAT00
SJC8AH7K711000Y1205FAAT02
−
−
−
−
−
−
DTC B1202:
DTC B1205:
DTC B1206:
DTC B1207:
YES
NO
YES
NO
YES
NO
21-100
21-100
Climate Control
DTC Troubleshooting
Climate Control Unit Internal
Error
Climate Control Unit Lost
Communication with Gauge Control Module
(VSP/NE message)
Climate Control Unit Lost
Communication with Gauge Control Module
(ECT message)
Climate Control Unit Lost
Communication with Gauge Control Module
(ILLUMI message)
NOTE:
• Check the battery condition (see page 22-74) and the
charging system (see page 4-26).
• If you are troubleshooting multiple DTCs, be sure to
follow the instructions in B-CAN system diagnosis
test mode A (see page 22-99).
1. Clear the DTC with the HDS.
2. Operate the climate control system in several
modes.
3. Check for DTCs using the HDS.
The climate control unit is faulty, replace the
control unit.
Intermittent failure, the climate control unit is
OK at this time.
NOTE: If you are troubleshooting multiple DTCs, be
sure to follow the instructions in B-CAN system
diagnosis test mode A (see page 22-99).
1. Clear the DTC with the HDS.
2. Operate the climate control system in several
modes.
3. Check for DTCs using the HDS.
Go to step 4.
Intermittent failure, the gauge control module
and climate control unit are OK at this time.
4. Check for DTCs using the HDS.
Perform the gauge control module input test
(see page 22-122).
Go to step 5.
5. Turn the ignition switch OFF.
6. Disconnect the climate control unit 30P connector.
7. Remove the gauge control module (see page
22-263).
Is DT C B1202 indicated?
Is DT C B1205, B1206 and/ or B1207 indicated?
Is DT C B1060 or B2157 indicated?
*01
SJC8AH7K711000Y1225FAAT00
−
−
−
−
−
−
YES
NO
YES
NO
YES
NO
DTC B1225 or DTC indicator A:
21-101
21-101
GAUGE CONTROL MODULE CONNECTOR B (14P)
BRN/YEL
CLIMATE CONTROL UNIT 30P CONNECTOR
LT BLU
8. Check for continuity between the climate control
unit 30P connector No. 30 terminal and gauge
control module connector B (14P) No. 6 terminal.
Substitute a known-good HVAC or climate
control unit, then return to step 3 and recheck. If the
problem is still present, replace the gauge control
module (see page 22-263).
Repair open in the wire between the climate
control unit and gauge control module.
1. Clear the DTC with the HDS.
2. Operate the climate control system in several
modes.
3. Check for DTCs using the HDS or self-diagnostic.
Go to step 4.
Intermittent failure, check for loose wires or
poor connections on the in-car temperature sensor
circuit.
4. Turn the ignition switch OFF.
5. Remove the in-car temperature sensor (see page
21-133) and test it (see page 21-133).
Go to step 6.
Replace the in-car temperature sensor.
6. Disconnect the climate control unit 30P connector.
(cont’d)
An Open in
the In-car Temperature Sensor Circuit
Wire side of female terminals
Wire side of female terminals
Is ther e continuity?
Is DT C B1225 or A indicated?
Is the in-car temper atur e sensor OK ?
01
02
−
−
−
−
YES
NO
YES
NO
21-102
Climate Control
DTC Troubleshooting (cont’d)
CLIMATE CONTROL UNIT 30P CONNECTOR
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR
LT BLU
LT BLU
CLIMATE CONTROL UNIT 30P CONNECTOR
IN-CAR TEMPERATURE SENSOR 2P CONNECTOR
RED/BLK
RED/BLK
7. Check for continuity between the climate control
unit 30P connector No. 8 terminal and the in-car
temperature sensor 2P connector No. 1 terminal.
Go to step 8.
Repair open in the wire between the climate
control unit and the in-car temperature sensor.
8. Check for continuity between the climate control
unit 30P connector No. 22 terminal and the in-car
temperature sensor 2P connector No. 2 terminal.
Check for loose wires or poor connections at
the climate control unit 30P connector and at the
in-car 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
Is ther e continuity?
Is ther e continuity?
01
02
SJC8AH7K711000Y1226FAAT00
−
−
−
−
−
−
−
−
DTC B1226 or DTC indicator B:
YES
NO
YES
NO
YES
NO
YES
NO
21-103
CLIMATE CONTROL UNIT 30P CONNECTOR
RED/BLK
LT BLU
CLIMATE CONTROL UNIT 30P CONNECTOR
LT BLU
RED/BLK
A Short in the
In-car Temperature Sensor Circuit
1. Clear the DTC with the HDS.
2. Operate the climate control system in several
modes.
3. Check for DTCs using the HDS or self-diagnostic.
Go to step 4.
Intermittent failure.
4. Turn the ignition switch OFF.
5. Remove the in-car temperature sensor (see page
21-133) and test it (see page 21-133).
Go to step 6.
Replace the in-car temperature sensor.
6. Disconnect the climate control unit 30P connector.
7. Check for continuity between body ground and the
climate control unit 30P connector No. 8 and No. 22
terminals.
Repair short to body ground in the wires
between the climate control unit and the in-car
temperature sensor.
Go to step 8.
8. Check for continuity between the climate control
unit 30P connector No. 8 and No. 22 terminals.
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
Is DT C B1226 or B indicated?
Is the in-car temper atur e sensor OK ?
Is ther e continuity?
Is ther e continuity?
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