Mazda 6. Manual - part 91

CONTROL SYSTEM 

U–37

U

Present Failure Indication Mode

•

In present failure indication mode, present failures in the control system circuits (open, short circuits) are 
detected, and the flashing of the rear defroster indicator light on the climate control unit indicates the DTCs 
shown in the table below.

Past Failure Indication Mode

•

In past failure indication mode, past failures (intermittent problems) in the input sensor circuits (open, short 
circuits) are stored, and the flashing of the rear defroster indicator light on the climate control unit indicates the 
DTCs shown in the table below. Erase DTCs from the memory after failures have been corrected so they are 
not maintained as past failures.

U–38

CONTROL SYSTEM 

Diagnostic trouble codes

Output Device Operation Check Mode

•

In the output device operation check mode, the climate control unit forces all the output system actuation 
devices to operate regardless of the input system. The displays change and the switch indicator lights 
illuminate automatically according to the actuator operated.

•

Inspect visually, listen for operation sound, and place hands over air discharge outlets to check for correct 
operating conditions and to locate the malfunctioning system.

DTC 

No.

Indicator pattern

Diagnosed circuit

Detected condition

Memo 

rized

02

Solar radiation sensor 
(present)

Open circuit in solar radiation sensor 
circuit
Short circuit in solar radiation sensor 
circuit (terminal B side only)

No

06

Cabin temperature 
sensor (present)

Open/short circuit is in cabin 
temperature sensor circuit

No

07

Cabin temperature 
sensor (past)

Cabin temperature sensor circuit is 
entered fail-safe mode at least once

Yes

10

Evaporator temperature 
sensor (present)

Open/short circuit is in evaporator 
temperature sensor circuit

No

11

Evaporator temperature 
sensor (past)

Evaporator temperature sensor 
circuit is entered fail-safe mode at 
least once

Yes

12

Ambient temperature 
sensor (present)

Open/short circuit is in Ambient 
temperature sensor circuit

No

13

Ambient temperature 
sensor (past)

Ambient temperature sensor circuit 
is entered fail-safe mode at least 
once

Yes

14

Water temperature 
sensor (present)

Open/short circuit is in Water 
temperature sensor circuit

No

15

Water temperature 
sensor (past)

Water temperature sensor circuit is 
entered fail-safe mode at least once

Yes

18

Air mix actuator 
(potentiometer) 
(present)

Open/short circuit is in air mix 
actuator (potentiometer) circuit

No

19

Air mix actuator 
(potentiometer) (past)

Air mix actuator (potentiometer) 
circuit is entered fail-safe mode at 
least once

Yes

21

Airflow mode actuator 
(potentiometer) 
(present)

Open/short circuit is in airflow mode 
actuator (potentiometer) circuit

No

22

Airflow mode actuator 
(potentiometer) ((past)

Airflow mode actuator 
(potentiometer) circuit is entered fail-
safe mode at least once

Yes

58

Air mix actuator (motor 
lock) (past)

Air mix actuator circuit is entered fail-
safe mode at least once

Yes

59

Airflow mode actuator 
(motor lock) (past)

Airflow mode actuator circuit is 
entered fail-safe mode at least once

Yes

CONTROL SYSTEM 

U–39

U

Output device operation check table

*

: Shown on the information display according to step.

End Of Sie

Step Operating device

Operating conditions

Moni 

tor

*

Other device conditions

1

Blower motor 
speed

1

•

Air mix actuator operation
— 50%

•

Airflow mode actuator operation
— VENT

•

Air intake actuator operation
— FRESH

•

A/C compressor operation
— ON

2

Air mix actuator 
operation

21.0

•

Blower motor speed
— 3rd

•

Airflow mode actuator operation
— VENT

•

Air intake actuator operation
— FRESH

•

A/C compressor operation
— ON

20.5

20.0

3

Airflow  mode 
actuator operation

3

•

Blower motor speed
— 3rd

•

Air mix actuator operation
— 50%

•

Air intake actuator operation
— FRESH

•

A/C compressor operation
— ON

4

Air intake actuator 
operation

4

•

Blower motor speed
— 3rd

•

Air mix actuator operation
— 0%

•

Airflow mode actuator operation
— VENT

A/C compressor 
operation

CONTENTS

Mazda6
Workshop
Manual

FOREWORD

This manual contains on-vehicle service 

and diagnosis for the Mazda6.

For proper repair and maintenance, 

a thorough familiarization with this manual 
is important, and it should always be kept 
in a handy place for quick and easy 
reference.

All the contents of this manual, including 

drawings and specifications, are the latest 
available at the time of printing. 
As modifications affecting repair or 
maintenance occur, relevant information 
supplementary to this volume will be made 
available at Mazda dealers. This manual 
should be kept up-to-date.

Mazda Motor Corporation reserves 

the right to alter the specifications and 
contents of this manual without obligation 
or advance notice.

All rights reserved. No part of this book 

may be reproduced or used in any form or 
by any means, electronic or 
mechanical—including photocopying and 
recording and the use of any kind of 
information storage and retrieval 
system—without permission in writing.

Mazda Motor Corporation

HIROSHIMA, JAPAN

APPLICATION:
This manual is applicable to vehicles 
beginning with the Vehicle Identification 
Numbers (VIN), and related materials shown 
on the following page.

© 2002 Mazda Motor Corporation

PRINTED IN The Netherlands, MARCH 2002 
1730–1E–02C

Title

Section

General Information

GI

Engine

B

Lubrication System

D

Cooling System

E

Fuel and Emission Control Systems

F

Engine Electrical System

G

Clutch

H

Manual Transaxle

J

Automatic Transaxle

K

Front and Rear Axles

M

Steering System

N

Braking System

P

Suspension

R

Body

S

Body Electrical System

T

Heater and Air Conditioner Systems

U

Technical Data

TD

Special Tools

ST