Mazda 6. Manual - part 330

T–80

WARNING AND INDICATOR SYSTEM 

Diagnostic procedure

DTC 13

Operation signal to tachometer

INSPECTION

INDICATION

SITUATION

ACTION

Wait for 2 seconds after selecting DTC 13.

Tachometer needle moves 
full scale then returns to 
3000 rpm.

Tachometer is okay.

Other than stated above.

Replace instrument 
cluster.

—

DTC 14

Operation signal to buzzer

INSPECTION

INDICATION

SITUATION

ACTION

Wait for 2 seconds after selecting DTC 14.

Buzzer continuously 
sounds.

Buzzer is okay.

Buzzer does not 
continuously sound.

Replace instrument 
cluster.

DTC 16

Operation signal to fuel-level warning light

INSPECTION

INDICATION

SITUATION

ACTION

Wait for 2 seconds after selecting DTC 16.

Fuel-level warning light 
turns on and off three 
times.

Fuel-level warning light is 
okay.

Other than stated above.

Replace instrument 
cluster.

DTC 18

Ignition key illumination on/off signal

INSPECTION

INDICATION

SITUATION

ACTION

Wait for 2 seconds after selecting DTC 18.

Ignition key illumination 
turns on and off three 
times.

Ignition key illumination is 
okay.

Other than stated above.

Measure voltage at 
instrument cluster terminal 
2C.
Is voltage B+?

• If as specified, replace 

instrument cluster.

• If not as specified, 

inspect following parts.
— Ignition key 

illumination

— Wiring harness 

(Battery—ignition 
key illumination—
instrument cluster)

WARNING AND INDICATOR SYSTEM 

T–81

T

Diagnostic procedure

DTC 22

Fuel level signal

STEP

INSPECTION

INDICATION

ACTION

1

Select DTC 22 with fuel gauge 
sender unit connector disconnected.

Go to next step.

Other than stated 
above.

Replace instrument cluster.

2

Connect between instrument cluster 
terminals 2D and 2M.

Go to next step.

Other than stated 
above.

Replace instrument cluster.

3

Using SST (Fuel and thermometer 
checker) or resistor, input 20 ohms 
to between instrument cluster 
terminals 2D and 2M.

Go to next step.

Other than stated 
above.

Replace instrument cluster.

4

Using SST (Fuel and thermometer 
checker) or resistor, input 60 ohms 
to between instrument cluster 
terminals 2D and 2M.

Go to next step.

Other than stated 
above.

Replace instrument cluster.

5

Using SST (Fuel and thermometer 
checker) or resistor, input 100 ohms 
to between instrument cluster 
terminals 2D and 2M.

Inspect fuel gauge sender unit.

Other than stated 
above.

Replace instrument cluster.

T–82

WARNING AND INDICATOR SYSTEM 

Diagnostic procedure

DTC 23

Operation signal to fuel gauge

INSPECTION

INDICATION

SITUATION

ACTION

Wait for 2 seconds after selecting DTC 23.

Fuel gauge indicates in 
following order for every 2 
seconds.

• F→1/2→E→F (fixed)

Fuel gauge is okay.

Other than stated above.

Replace instrument 
cluster.

Replace instrument cluster.

DTC 25

Operation signal to water temperature gauge

INSPECTION

INDICATION

SITUATION

ACTION

Wait for 2 seconds after selecting DTC 25.

Water temperature gauge 
indicates in following order 
for every 2 seconds.

• H→Center→C→H 

(fixed)

Water temperature gauge 
is okay.

Other than stated above.

Replace instrument 
cluster.

Replace instrument cluster.

DTC 26

LCD indication

INSPECTION

INDICATION

SITUATION

ACTION

Select DTC 26.

Indication is normal.

LCD is okay.

Other than stated above.

Replace instrument 
cluster.

DTC 31

Key reminder on/off signal

STEP

INSPECTION

INDICATION

ACTION

1

Remove key from steering lock and 
then insert key into steering lock 
after selecting DTC 31. (Key 
reminder switch on.)

Go to next step.

Measure voltage at instrument cluster terminal 2B.
Is voltage B+?

• If as specified, replace instrument cluster.

• If not as specified, replace following parts.

— Key reminder switch
— Wiring harness (Battery—key reminder switch—

instrument cluster)

WARNING AND INDICATOR SYSTEM 

T–83

T

End Of Sie

PID/DATA MONITOR AND RECORD PROCEDURE

A6E811855430W07

1. Connect SST (WDS or equivalent) to the vehicle 

DLC-2 16-pin connector.

2. Access and monitor PIDs using SST (WDS or 

equivalent).

Monitor Item Table

• The PID/DATA monitoring items for the instrument cluster is as shown in the table below.

—: Not applicable

End Of Sie

FUEL GAUGE SENDER UNIT INSPECTION

A6E811860960W01

1. Move the float to the topmost and bottommost 

positions, and verify that the resistance between 
terminals A and B of the unit and the position of 
the float are as indicated in the figure.

• If they are not as indicated, replace the fuel 

gauge sender unit.

End Of Sie

2

Remove key from steering lock (Key 
reminder switch off.)

Measure voltage at instrument cluster terminal 2B.
Is voltage 0 V?

• If as specified, replace instrument cluster.

• If not as specified, inspect following parts.

— Key reminder switch
— Wiring harness (Key reminder switch—

instrument cluster)

Input signal to instrument cluster is okay.

STEP

INSPECTION

INDICATION

ACTION

DLC-2

A6E3970W002

PID item

Definition

Unit/Condition

Terminal

CCNT_HE

Continuous codes

Number of continuous codes

—

ECT_GAUGE

Temperature gauge

°C

°F

2W,  2X

FUEL

Fuel flow

l/min

2M

ODOMETR

Total distance

km

mile

2W, 2X

SPEEDSG

Speedometer

km/h

mile/h

RPM

Tachometer

rpm

A6E8118W002