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Honda Ridgeline. Manual - part 420

＊０１

＊０２

ＳＪＣ８ＡＨ７Ｋ７１１０００Ｙ１２３７ＦＡＡＴ００

−

DTC B1237 or DTC indicator M:

YES

21-116

Climate Control

DTC Troubleshooting (cont’d)

CLIMATE CONTROL UNIT 30P CONNECTOR

GRY

YEL

CLIMATE CONTROL UNIT 30P CONNECTOR

GRY

YEL

A Short in the

Passenger’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.

4. Turn the ignition switch OFF.

5. Test the passenger’s air mix control motor

(see page 21-136).

Go to step 6.

Replace the passenger’s air mix control motor

(see page 21-137).

6. Disconnect the passenger’s air mix control motor

7P connector.

7. Disconnect the climate control unit 30P connector.

8. Check for continuity between body ground and the

climate control unit 30P connector No. 5 and No. 23
terminals individually.

Repair short to body ground in the wires

between the climate control unit and the
passenger’s air mix control motor.

Go to step 9.

9. Check for continuity between the climate control

unit 30P connector terminals as follows.

Repair the short in the wires.

Go to step 10.

Wire side of female terminals

Is DT C B1237 or M indicated?

Is the passenger ’s air mix contr ol motor OK ?

Is ther e continuity?

＊０３

ＳＪＣ８ＡＨ７Ｋ７１１０００Ｙ１２３８ＦＡＡＴ００

−

YES

DTC B1238 or DTC indicator N:

21-117

CLIMATE CONTROL UNIT 30P CONNECTOR

GRY

YEL

10. Turn the ignition switch ON (II), and check the same

terminals for voltage to body ground.

Repair short to power in the wire(s) between

the climate control unit and the passenger’s 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. 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 passenger’s control motor
circuit.

4. Turn the ignition switch OFF.

5. Test the passenger’s air mix control motor

(see page 21-136).

Go to step 6.

Replace the passenger’s air mix control motor

(see page 21-137), or repair the passenger’s air mix
control linkage or door.

6. Disconnect the passenger’s air mix control motor

7P connector.

7. Disconnect the climate control unit 30P connector.

(cont’d)

A Problem in

the Passenger’s Air Mix Control Linkage,
Door, or Motor

Wire side of female terminals

Is ther e voltage?

Is DT C B1238 or N indicated?

Is the passenger ’s air mix contr ol motor OK ?

＊０１

＊０２

−

YES

21-118

Climate Control

DTC Troubleshooting (cont’d)

PASSENGER’S AIR MIX CONTROL MOTOR 7P CONNECTOR

CLIMATE CONTROL UNIT 30P CONNECTOR

LT GRN

YEL/BLK

LT GRN

YEL/BLK

CLIMATE CONTROL UNIT 30P CONNECTOR

YEL/BLK

LT GRN

8. Check for continuity between the following

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

7P:

No. 20

No. 1

No. 21

No. 2

Go to step 9.

Repair open in the wire(s) between the

climate control unit and the passenger’s air mix
control motor.

9. Check for continuity between body ground and

climate control unit 30P connector No. 20 and
No. 21 terminals individually.

Repair short to body ground in the wire(s)

between the climate control unit and the
passenger’s air mix control motor.

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 ther e continuity?

＊０３

ＳＪＣ８ＡＨ７Ｋ７１１０００Ｙ１２３９ＦＡＡＴ００

−

DTC B1239 or DTC indicator O:

YES

21-119

CLIMATE CONTROL UNIT 30P CONNECTOR

MODE CONTROL MOTOR 7P CONNECTOR

RED/BLU

RED/YEL

RED/BLK

WHT/
BLU

RED/BLU

RED/YEL

RED/BLK

An Open or

Short in the Mode 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 mode control motor
circuit.

4. Turn the ignition switch OFF.

5. Test the mode control motor (see page 21-56).

Go to step 6.

Replace the mode control motor (see page

21-56).

6. Disconnect the mode control motor 7P connector.

7. Disconnect the climate control unit 30P connector.

8. Check for continuity between the following

terminals of climate control unit 30P connector and
the mode control motor 7P connector.
30P:

7P:

No. 2

No. 4

No. 3

No. 5

No. 4

No. 6

No. 22

No. 7

Go to step 9.

Repair open in the wires between the climate

control unit and the mode control motor.

(cont’d)

Wire side of female terminals

Is DT C B1239 or O indicated?

Is the mode contr ol motor OK ?

Is ther e continuity?

Content .. 418 419 420 421 ..