Mazda CX 7. Manual — part 281

ON-BOARD DIAGNOSTIC

07-02–11

07-02

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A/C OPERATION CHECK MODE DISPLAY

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1. Connect the M-MDS to the DLC-2 connector.
2. After the vehicle is identified, select the following

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

— Select the “Body” tab.

• When using the PDS (pocket PC)

— Select “All Tests and Calibrations”.

3. Select the “EATC Operation Check” from the

screen menu.

4. Verify the A/C operation check mode according to

the directions on the screen.

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DTC DISPLAY

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1. Connect the M-MDS to the DLC-2 connector.
2. Shine a 60 W incandescent light from a distance

of approx. 100 mm {3.9 in} directly onto the solar
radiation sensor.

Note

• If incandescent light is not shone on the

solar radiation sensor, the climate control
unit determines a malfunction and indicates
DTC “B1260, B1261”.

3. After the vehicle is identified, select the following

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

— Select the “Toolbox” tab.

— Select the “Self Test”.

— Select the “Module”.

— Select the “EATC”.

• When using the PDS (pocket PC)

— Select “All Tests and Calibrations”.

— Select the “EATC”.

— Select the “Self Test”.

4. Verify the DTC according to the directions on the screen.

• If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.

5. After completion of repairs, clear all DTCs stored in the Climate control unit. (See 07-02-11 CLEARING DTC.)

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CLEARING DTC

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1. Connect the M-MDS to the DLC-2 connector.
2. Shine a fluorescent light directly onto the solar

radiation sensor.

Note

• If fluorescent light is not shone on the solar

radiation sensor, the climate control unit
determines a malfunction and indicates DTC
“B1260, B1261”.

3. After the vehicle is identified, select the following

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

— Select the “Toolbox” tab.

— Select the “Self Test”.

— Select the “Module”.

— Select the “EATC”.

• When using the PDS (pocket PC)

— Select “All Tests and Calibrations”.

— Select the “EATC”.

— Select the “Self Test”.

4. Verify the DTC according to the directions on the screen.
5. Press the clear button on the DTC screen to clear the DTC.
6. Verify that no DTCs are displayed.

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DLC-2

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DLC-2

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DLC-2

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ON-BOARD DIAGNOSTIC

07-02–12

DTC TABLE

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DTC

Malfunction location

Detected condition

Memory

function

Page

B1251

Passenger
compartment
temperature sensor

Passenger compartment temperature
sensor circuit open

X

(See 07-02-3 DTC B1251, B1253.)
(See 07-02-4 DTC B1251, B1253,
B1255, B1257, B1274, B1275, B1282,
B1283, B1947, B2014 (MULTIPLE
DTCS INDICATED).)

B1253

Passenger compartment temperature
sensor circuit short (body ground)

X

B1255

Ambient temperature
sensor

Ambient temperature sensor circuit open

X

(See 07-02-5 DTC B1255, B1257.)
(See 07-02-4 DTC B1251, B1253,
B1255, B1257, B1274, B1275, B1282,
B1283, B1947, B2014 (MULTIPLE
DTCS INDICATED).)

B1257

Ambient temperature sensor circuit short
(body ground)

X

B1260

Solar radiation sensor

Solar radiation sensor circuit short
(power supply)

X

(See 07-02-4 DTC B1260, B1261.)
(See 07-02-6 DTC B1260, B1261,
B1274, B1275, B1282, B1283
(MULTIPLE DTCS INDICATED).)

B1261

Solar radiation sensor circuit short (body
ground)

—

B1274

Airflow mode actuator
(potentiometer)

Airflow mode actuator (potentiometer)
circuit short (power supply)

X

(See 07-02-7 DTC B1274, B1275.)
(See 07-02-4 DTC B1251, B1253,
B1255, B1257, B1274, B1275, B1282,
B1283, B1947, B2014 (MULTIPLE
DTCS INDICATED).)
(See 07-02-6 DTC B1260, B1261,
B1274, B1275, B1282, B1283
(MULTIPLE DTCS INDICATED).)

B1275

Airflow mode actuator (potentiometer)
circuit short (body ground)

X

B1282

Air mix actuator
(potentiometer)

Air mix actuator (potentiometer) circuit
short (power supply)

X

(See 07-02-8 DTC B1282, B1283.)
(See 07-02-4 DTC B1251, B1253,
B1255, B1257, B1274, B1275, B1282,
B1283, B1947, B2014 (MULTIPLE
DTCS INDICATED).)
(See 07-02-6 DTC B1260, B1261,
B1274, B1275, B1282, B1283
(MULTIPLE DTCS INDICATED).)

B1283

Air mix actuator (potentiometer) circuit
short (body ground)

X

B1947

Evaporator
temperature sensor

Evaporator temperature sensor circuit
short (body ground)

X

(See 07-02-8 DTC B1947, B2014.)
(See 07-02-4 DTC B1251, B1253,
B1255, B1257, B1274, B1275, B1282,
B1283, B1947, B2014 (MULTIPLE
DTCS INDICATED).)

B2014

Evaporator temperature sensor circuit
open

X

B2832

Airflow mode actuator
(motor lock)

Airflow mode actuator motor lock

X

(See 07-02-9 DTC B2832.)

B2834

Air mix actuator (motor
lock)

Air mix actuator motor lock

X

(See 07-02-10 DTC B2834.)

U0155 CAN communication

system

Reception error in signal from ICM (HEC)

X

—

U0516

BUS OFF error

X

—

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ON-BOARD DIAGNOSTIC

07-02–13

07-02

PID/DATA MONITOR DISPLAY

id070200801800

1. Connect the M-MDS to the DLC-2 connector.
2. After the vehicle is identified, select the following

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

— Select the “Toolbox” tab.

— Select the “Data Logger”.

— Select the “Module”.

— Select the “EATC”.

• When using the PDS (pocket PC)

— Select the “Module Tests”.

— Select the “EATC”.

— Select the “Data Logger”.

3. Select the applicable PID from the PID table
4. Verify the PID data according to the directions on

the screen.

Note

• The PID data screen function is used for monitoring the calculated value. Therefore, if the monitored value

of the output parts is not within the specification, inspection of the monitored value of input parts
corresponding to applicable output part control is necessary. In addition, because the system does not
display output part malfunction as abnormality in the monitored value, it is necessary to inspect the output
part individually.

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PID/DATA MONITOR TABLE

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ACTIVE COMMAND MODES DISPLAY

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1. Connect the M-MDS to the DLC-2 connector.
2. After the vehicle is identified, select the following

items from the initialization screen of the M-MDS.

• When using the IDS (notebook PC)

— Select the “Toolbox” tab.

— Select the “Data Logger”.

— Select the “Module”.

— Select the “EATC”.

• When using the PDS (pocket PC)

— Select the “Module Tests”.

— Select the “EATC”.

— Select the “Data Logger”.

3. Select the active command modes from the PID

table.

4. Perform the active command modes, inspect the operations for each parts.

• If there is no operation sound from the relay, motor, and solenoid after the active command mode

inspection is performed, it is possible that there is an open or short circuit in the wiring harness, relay, motor
or solenoid, or sticking and operation malfunction.

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ACTIVE COMMAND MODES TABLE

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DLC-2

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PID name (definition)

Unit/Condition

Operation Condition (Reference)

DTC_CNT
(Number of continuous DTCs)



Indicates number of DTC

DLC-2

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Command name

Output part

Operation

Operating condition

MIX_ACT

Air Mix Actuator

On/Off

Ignition switch at ON

REC/FRESH

REC/FRESH Switch

DISPLAY

Information Display

BLOWER

Blower Motor

MODE_ACT

Airflow Mode Actuator

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