Content .. 416 417 418 419 ..

Honda Ridgeline. Manual - part 418

０２

ＳＪＣ８ＡＨ７Ｋ７１１０００Ｙ１２３１ＦＡＡＴ００

−

YES

DTC B1231 or DTC indicator G:

21-108

Climate Control

DTC Troubleshooting (cont’d)

CLIMATE CONTROL UNIT 30P CONNECTOR

ORN

RED/BLK

8. Check for continuity between the climate control

unit 30P connector No. 10 and No. 22 terminals.

Repair short in the wires between the climate

control unit and the sunlight sensor.

Go to step 9.

9. Reconnect the sunlight sensor 2P connector.

10. Reconnect the climate control unit 30P connector.

11. Test the sunlight sensor (see page 21-134).

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 21-134).

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 evaporator temperature
sensor circuit.

4. Turn the ignition switch OFF.

5. Remove the evaporator temperature sensor

(see page 21-53) and test it (see page 21-53).

Go to step 6.

Replace the evaporator temperature

sensor.

An Open in

the Evaporator Temperature Sensor Circuit

Wire side of female terminals

Is ther e continuity?

Is the sunlight sensor OK ?

Is DT C B1231 or G indicated?

Is the evapor ator temper atur e sensor OK ?

０１

０２

−

YES

21-109

CLIMATE CONTROL UNIT 30P CONNECTOR

BRN

EVAPORATOR TEMPERATURE SENSOR 2P CONNECTOR

CLIMATE CONTROL UNIT 30P CONNECTOR

RED/BLK

EVAPORATOR TEMPERATURE SENSOR 2P CONNECTOR

6. Disconnect the climate control unit 30P connector.

7. Check for continuity between the climate control

unit 30P connector No. 7 terminal and the
evaporator temperature sensor 2P connector No. 2
terminal.

Go to step 8.

Repair open in the wire between the climate

control unit and the evaporator temperature
sensor.

8. Check for continuity between the climate control

unit 30P connector No. 22 terminal and the
evaporator temperature sensor 2P connector No. 1
terminal.

Check for loose wires or poor connections at

the climate control unit 30P connector and at the
evaporator 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 evaporator temperature
sensor.

Wire side of female terminals

Is ther e continuity?

０１

０２

ＳＪＣ８ＡＨ７Ｋ７１１０００Ｙ１２３２ＦＡＡＴ００

−

DTC B1232 or DTC indicator H:

YES

21-110

Climate Control

DTC Troubleshooting (cont’d)

CLIMATE CONTROL UNIT 30P CONNECTOR

BRN

RED/BLK

CLIMATE CONTROL UNIT 30P CONNECTOR

BRN

RED/BLK

A Short in the

Evaporator 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 evaporator temperature sensor

(see page 21-53) and test it (see page 21-53).

Go to step 6.

Replace the evaporator 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. 7 and No. 22
terminals.

Repair short to body ground in the wire

between the climate control unit and the
evaporator temperature sensor.

Go to step 8.

8. Check for continuity between the climate control

unit 30P connector No. 7 and No. 22 terminals.

Repair short in the wires between the climate

control unit and the evaporator 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

Is DT C B1232 or H indicated?

Is the evapor ator temper atur e sensor OK ?

Is ther e continuity?

＊０１

ＳＪＣ８ＡＨ７Ｋ７１１０００Ｙ１２３３ＦＡＡＴ００

−

DTC B1233 or DTC indicator I:

YES

21-111

CLIMATE CONTROL UNIT 30P CONNECTOR

GRY

PNK/BLK

RED/
BLK

RED/BLK

GRY

DRIVER’S AIR MIX CONTROL MOTOR 7P CONNECTOR

An Open in the

Driver’s Air Mix Control Motor 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, check for loose wires or

poor connections on the driver’s air mix control
motor circuit.

4. Turn the ignition switch OFF.

5. Test the driver’s air mix control motor (see page

21-135).

Go to step 6.

Replace the driver’s air mix control motor

(see page 21-135).

6. Disconnect the driver’s air mix control motor 7P

connector.

7. Disconnect the climate control unit 30P connector.

8. Check for continuity between the following

terminals of the climate control unit 30P connector
and the driver’s air mix control motor 7P connector.
30P:

7P:

No. 6

No. 3

No. 22

No. 5

No. 23

No. 7

Check for loose wires or poor connections at

the climate control unit 30P connector and at the
driver’s air mix 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.

Repair open in the wires between the climate

control unit and the driver’s air mix control
motor.

Wire side of female terminals

Is DT C B1233 or I indicated?

Is the dr iver ’s air mix contr ol motor OK ?

Is ther e continuity?

Content .. 416 417 418 419 ..