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Honda Ridgeline. Manual - part 416

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−

DTC B1202:

DTC B1205:

DTC B1206:

DTC B1207:

YES

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?

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−

YES

DTC B1225 or DTC indicator A:

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

Is ther e continuity?

Is DT C B1225 or A indicated?

Is the in-car temper atur e sensor OK ?

０１

０２

−

YES

21-102

Climate Control

DTC Troubleshooting (cont’d)

CLIMATE CONTROL UNIT 30P CONNECTOR

IN-CAR TEMPERATURE SENSOR 2P CONNECTOR

LT BLU

CLIMATE CONTROL UNIT 30P CONNECTOR

IN-CAR TEMPERATURE SENSOR 2P CONNECTOR

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

Is ther e continuity?

０１

０２

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−

DTC B1226 or DTC indicator B:

YES

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

Is DT C B1226 or B indicated?

Is the in-car temper atur e sensor OK ?

Is ther e continuity?

Content .. 414 415 416 417 ..