Mazda CX 7. Manual — part 340

ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER]

09-02E–1

09-02E

09-02E ON-BOARD DIAGNOSTIC [INSTRUMENT
CLUSTER]

DTC INSPECTION

[INSTRUMENT CLUSTER] . . . . . . . . . . 09-02E–1

DTC TABLE

[INSTRUMENT CLUSTER] . . . . . . . . . . 09-02E–1

DTC B1202

[INSTRUMENT CLUSTER] . . . . . . . . . . 09-02E–2

DTC B1204

[INSTRUMENT CLUSTER] . . . . . . . . . . 09-02E–3

DTC B1342

[INSTRUMENT CLUSTER] . . . . . . . . . . 09-02E–5

DTC B2477

[INSTRUMENT CLUSTER] . . . . . . . . . . 09-02E–5

DTC U2064

[INSTRUMENT CLUSTER] . . . . . . . . . . 09-02E–6

Diagnostic Procedure . . . . . . . . . . . . . . 09-02E–6

End of Toc

WM: INSTRUMENTATION/DRIVER INFO

DTC INSPECTION[INSTRUMENT CLUSTER]

id0902e8840000

1. Connect the M-MDS to the DLC-2.
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 “Self Test”.

• Select “Module”.

• Select “HEC”.

When using the PDS (pocket PC)

• Select “Module Tests”.

• Select “HEC”.

• Select “Self Test”.

3. Verify the DTC according to the directions on the

screen.

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

4. After completion of repairs, clear all DTCs stored in the instrument cluster.

End Of Sie

DTC TABLE[INSTRUMENT CLUSTER]

id0902e8840100

End Of Sie

DLC-2

acxuuw00002075

DTC

Malfunction location

Freeze

frame data

Page

B1202

Fuel gauge sender unit circuit malfunction (open circuit)

—

(See 09-02E-2 DTC
B1202[INSTRUMENT
CLUSTER].)

B1204

Fuel gauge sender unit circuit malfunction (short to GND)

—

(See 09-02E-3 DTC
B1204[INSTRUMENT
CLUSTER].)

B1342

Instrument cluster malfunction

—

(See 09-02E-5 DTC
B1342[INSTRUMENT
CLUSTER].)

B2477

Configuration error

—

(See 09-02E-5 DTC
B2477[INSTRUMENT
CLUSTER].)

U0073

CAN system communication error

—

(See 09-02D-2 MULTIPLEX
COMMUNICATION
SYSTEM[MULTIPLEX
COMMUNICATION SYSTEM].)

U0100

Communication error to PCM

×

U0101

Communication error to TCM

×

U0114

Communication error to AWD control module

×

U0121

Communication error to DSC HU/CM

×

U0140

Communication error to BCM

×

U0151

Communication error to SAS control module

×

U0214

Communication error to keyless control module

×

U2023

Abnormal message from other module

×

U2064

Warning light illumination request signal from other modules

×

(See 09-02E-6 DTC
U2064[INSTRUMENT
CLUSTER].)

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ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER]

09-02E–2

DTC B1202[INSTRUMENT CLUSTER]

id0902e8840200

Diagnostic procedure

DTC B1202

Fuel gauge sender unit circuit malfunction (open circuit)

DETECTION

CONDITION

• The resistance between instrument cluster and fuel gauge sender unit is more than 600 ohms for 5 s.

POSSIBLE

CAUSE

• Open circuit in wiring harness between instrument cluster and fuel gauge sender unit

• Fuel gauge sender unit malfunction

• Instrument cluster malfunction

STEP

INSPECTION

ACTION

1

INSPECT FUEL GAUGE

• Perform the check code 23 inspection.

• Is there any malfunction?

Yes

Replace the instrument cluster.

No

Go to the next step.

2

INSPECT INSTRUMENT CLUSTER
CONNECTOR

• Turn the ignition switch to the LOCK position.

• Disconnect the instrument cluster connector.

• Inspect the instrument cluster connector

terminals for poor connection (such as
damaged/pulled-out pins, and corrosion).

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part.

No

Go to the next step.

3

INSPECT FUEL GAUGE SENDER UNIT
CONNECTOR

• Turn the ignition switch to the LOCK position.

• Disconnect the fuel gauge sender unit and

fuel gauge sender sub-unit connectors.

• Inspect the fuel gauge sender unit and fuel

gauge sender sub-unit connector terminals
for poor connection (such as damaged/
pulled-out pins, and corrosion).

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part.

No

Go to the next step.

2U

A

C

2W

B

A

FUEL GAUGE SENDER UNIT

FUEL GAUGE SENDER SUB-UNIT

AWD

2WD

INSTRUMENT CLUSTER

A

B

A

B

C

D

FUEL GAUGE SENDER

UNIT WIRING HARNESS-

SIDE CONNECTOR

FUEL GAUGE SENDER SUB-

UNIT WIRING HARNESS-

SIDE CONNECTOR

INSTRUMENT CLUSTER WIRING

HARNESS-SIDE CONNECTOR

2A

2B

2C

2D

2E

2F

2G

2H

2I

2J

2K

2L

2M

2N

2O

2P

2Q

2R

2S

2T

2U

2V

2W

2X

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ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER]

09-02E–3

09-02E

End Of Sie

DTC B1204[INSTRUMENT CLUSTER]

id0902e8840300

4

INSPECT WIRING HARNESS

• Turn the ignition switch to the LOCK position.

• Inspect for continuity between following

terminals:

2WD

— Instrument cluster terminal 2U — fuel

gauge sender unit terminal A (wiring
harness-side)

— Instrument cluster terminal 2W — fuel

gauge sender unit terminal C (wiring
harness-side)

AWD

— Instrument cluster terminal 2U — fuel

gauge sender unit terminal A (wiring
harness-side)

— Fuel gauge sender unit terminal C — fuel

gauge sender sub-unit terminal A (wiring
harness-side)

— Instrument cluster terminal 2W — fuel

gauge sender sub-unit terminal B (wiring
harness-side)

• Is there continuity?

Yes

Inspect the fuel gauge sender unit and fuel gauge sender
sub-unit (AWD).

• Repair or replace if necessary.

No

Repair or replace the wiring harness.

STEP

INSPECTION

ACTION

DTC B1204

Fuel gauge sender unit circuit malfunction (short to GND)

DETECTION

CONDITION

• The resistance between instrument cluster and fuel gauge sender unit is less than 6 ohms for 5 s.

POSSIBLE

CAUSE

• Short to GND in wiring harness between instrument cluster and fuel gauge sender unit

• Wiring harness between instrument cluster and fuel gauge sender unit short each other

• Fuel gauge sender unit malfunction

• Instrument cluster malfunction

2U

A

C

2W

B

A

FUEL GAUGE SENDER UNIT

FUEL GAUGE SENDER SUB-UNIT

AWD

2WD

INSTRUMENT CLUSTER

A

B

A

B

C

D

FUEL GAUGE SENDER

UNIT WIRING HARNESS-

SIDE CONNECTOR

FUEL GAUGE SENDER SUB-

UNIT WIRING HARNESS-

SIDE CONNECTOR

INSTRUMENT CLUSTER WIRING

HARNESS-SIDE CONNECTOR

2A

2B

2C

2D

2E

2F

2G

2H

2I

2J

2K

2L

2M

2N

2O

2P

2Q

2R

2S

2T

2U

2V

2W

2X

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ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER]

09-02E–4

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

1

INSPECT FUEL GAUGE

• Perform the check code 23 inspection.

• Is there any malfunction?

Yes

Replace the instrument cluster.

No

Go to the next step.

2

INSPECT INSTRUMENT CLUSTER
CONNECTOR

• Turn the ignition switch to the LOCK position.

• Disconnect the instrument cluster connector.

• Inspect the instrument cluster connector

terminals for poor connection (such as
damaged/pulled-out pins, and corrosion).

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part.

No

Go to the next step.

3

INSPECT FUEL GAUGE SENDER UNIT
CONNECTOR

• Turn the ignition switch to the LOCK position.

• Disconnect the fuel gauge sender unit and

fuel gauge sender sub-unit connectors.

• Inspect the fuel gauge sender unit and fuel

gauge sender sub-unit connector terminals
for poor connection (such as damaged/
pulled-out pins, and corrosion).

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part.

No

Go to the next step.

4

INSPECT WIRING HARNESS

• Turn the ignition switch to the LOCK position.

• Inspect for continuity between following

terminals:

2WD

— Instrument cluster terminal 2U (wiring

harness-side) — body GND

— Instrument cluster terminal 2W (wiring

harness-side) — body GND

AWD

— Instrument cluster terminal 2U (wiring

harness-side) — body GND

— Instrument cluster terminal 2W (wiring

harness-side) — body GND

— Fuel gauge sender unit terminal C (wiring

harness-side) — body GND

• Is there continuity?

Yes

Repair or replace the wiring harness.

No

Go to the next step.

5

INSPECT WIRING HARNESS

• Turn the ignition switch to the LOCK position.

• Inspect for continuity between following

terminals:

2WD

— Instrument cluster terminal 2U —

instrument cluster terminal 2W (wiring
harness-side)

AWD

— Instrument cluster terminal 2U —

instrument cluster terminal 2W (wiring
harness-side)

— Fuel gauge sender unit terminal A — fuel

gauge sender unit terminal C (wiring
harness-side)

— Fuel gauge sender sub-unit terminal A —

fuel gauge sender sub-unit terminal B
(wiring harness-side)

• Is there continuity?

Yes

Repair or replace the wiring harness.

No

Inspect the fuel gauge sender unit and fuel gauge sender
sub-unit (AWD).

• Repair or replace if necessary.

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