Mazda CX 7. Manual — part 357

SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]

09-03C–7

09-03C

NO. 7 SPEEDOMETER INDICATION IS DEFECTIVE[INSTRUMENT CLUSTER]

id0903d5808000

Diagnostic procedure

End Of Sie

7

Speedometer indication is defective

POSSIBLE

CAUSE

• DSC HU/CM malfunction

• PCM malfunction

• TCM malfunction

• Instrument cluster malfunction

• Connector or pin malfunction

• Short circuit in wiring harness between CAN-L, CAN-H and GND

• Open circuit in CAN wiring harness (CAN-L, CAN-H)

• CAN wiring harness (CAN-L, CAN-H) short each other

STEP

INSPECTION

ACTION

1

• Start the engine, and drive the vehicle.

— Does the speedometer needle move

smoothly?

— Does the speedometer needle indicate

correct speed?

Yes

Troubleshooting completed.

No

Go to the next step.

2

• Inspect the DTC for the instrument cluster

ON-BOARD DIAGNOSTIC SYSTEM.

• Has DTC U2023 been recorded in memory?

Yes

Go to the next step.

No

Go to Step 4.

3

• Inspect the FREEZE FRAME DATA for DTC

U2023.

• Has the speedometer fall-safe function been

requested?

Yes

Inspect the DTC for the PCM, DTC HU/CM and TCM.
(See 01-02-7 ON-BOARD DIAGNOSTIC TEST[L3 WITH
TC].)
(See 04-02-3 ON-BOARD DIAGNOSIS.)
(See 05-02-3 AUTOMATIC TRANSAXLE ON-BOARD
DIAGNOSTIC FUNCTION[AW6A-EL, AW6AX-EL].)

No

Go to the next step.

4

• Start the instrument cluster input/output

check mode.

• Inspect the speedometer using the check

code 12.

• Is the speedometer normal?

Yes

Inspect the DSC HU/CM, or connectors.

No

Replace the instrument cluster.

5

• Disconnect the negative battery cable.

• Measure the resistance between the DLC-2

terminals F and E.

• Is the resistance 54— 66 ohms?

Yes

Go to the next step.

No

Go to Step 7.

6

• Disconnect the negative battery cable.

• Inspect the DLC-2 terminals F and E for

short to power supply or GND.

• Is there any malfunction?

Yes

Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.

No

Replace the instrument cluster.

7

• Turn the ignition switch off.

• Inspect the instrument cluster connector

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

• Are the terminals normal?

Yes

Go to the next step.

No

Repair or replace the terminal.

8

• Disconnect the negative battery cable.

• Measure the resistance between the

instrument cluster connector terminals 2R
and 2T.

• Is the resistance 114— 126 ohms?

Yes

Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.

No

Replace the instrument cluster.

2A
2B

2C
2D

2E
2F

2G
2H

2I

2J

2K

2L

2M

2N

2W

2X

2U
2V

2S
2T

2Q
2R

2O

2P

1871-1U-06B(09-03C).fm 7 ページ ２００６年３月１５日 水曜日 午前１１時４４分

SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]

09-03C–8

NO. 8 TACHOMETER INDICATION IS DEFECTIVE[INSTRUMENT CLUSTER]

id0903d5808100

Diagnostic procedure

End Of Sie

8

Tachometer indication is defective

POSSIBLE

CAUSE

• PCM malfunction

• Instrument cluster malfunction

• Connector or pin malfunction

• Short circuit in wiring harness between CAN-L, CAN-H and GND

• Open circuit in CAN wiring harness (CAN-L, CAN-H)

• CAN wiring harness (CAN-L, CAN-H) short each other

STEP

INSPECTION

ACTION

1

• Start the engine.

— Does the tachometer needle move

smoothly?

— Does the tachometer needle indicate

correct engine speed?

Yes

Troubleshooting completed.

No

Go to the next step.

2

• Inspect the DTC for the instrument cluster

ON-BOARD DIAGNOSTIC SYSTEM.

• Has DTC U2023 been recorded in memory?

Yes

Go to the next step.

No

Go to Step 4.

3

• Inspect the FREEZE FRAME DATA for DTC

U2023.

• Has the speedometer fall-safe function been

requested?

Yes

Inspect the DTC for the PCM.
(See 01-02-7 ON-BOARD DIAGNOSTIC TEST[L3 WITH
TC].)

No

Go to the next step.

4

• Start the instrument cluster input/output

check mode.

• Inspect the tachometer using the check code

13.

• Is the tachometer normal?

Yes

Inspect the PCM or connectors.

No

Replace the instrument cluster.

5

• Disconnect the negative battery cable.

• Measure the resistance between the DLC-2

terminals F and E.

• Is the resistance 54— 66 ohms?

Yes

Go to the next step.

No

Go to Step 7.

6

• Disconnect the negative battery cable.

• Inspect the DLC-2 terminals F and E for

short to power supply or GND.

• Is there any malfunction?

Yes

Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.

No

Replace the instrument cluster.

7

• Turn the ignition switch off.

• Inspect the instrument cluster connector

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

• Are the terminals normal?

Yes

Go to the next step.

No

Repair or replace the terminal.

8

• Disconnect the negative battery cable.

• Measure the resistance between the

instrument cluster connector terminals 2R
and 2T.

• Is the resistance 114— 126 ohms?

Yes

Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.

No

Replace the instrument cluster.

2A
2B

2C
2D

2E
2F

2G
2H

2I

2J

2K

2L

2M

2N

2W

2X

2U
2V

2S
2T

2Q
2R

2O

2P

1871-1U-06B(09-03C).fm 8 ページ ２００６年３月１５日 水曜日 午前１１時４４分

SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]

09-03C–9

09-03C

NO. 9 WATER TEMPERATURE GAUGE INDICATION IS DEFECTIVE[INSTRUMENT CLUSTER]

id0903d5808200

Diagnostic procedure

End Of Sie

9

Water temperature gauge indication is defective

POSSIBLE

CAUSE

• PCM malfunction

• Instrument cluster malfunction

• Connector or pin malfunction

• Short circuit in wiring harness between CAN-L, CAN-H and GND

• Open circuit in CAN wiring harness (CAN-L, CAN-H)

• CAN wiring harness (CAN-L, CAN-H) short each other

STEP

INSPECTION

ACTION

1

• Start the engine.

• Does the water temperature gauge needle

move to medium range gradually and stay
there?

Yes

Troubleshooting completed.

No

Go to the next step.

2

• Inspect the DTC for the instrument cluster

ON-BOARD DIAGNOSTIC SYSTEM.

• Has DTC U2023 been recorded in memory?

Yes

Go to the next step.

No

Go to Step 4.

3

• Inspect the FREEZE FRAME DATA for DTC

U2023.

• Has the speedometer fall-safe function been

requested?

Yes

Inspect the DTC for the PCM.
(See 01-02-7 ON-BOARD DIAGNOSTIC TEST[L3 WITH
TC].)

No

Go to the next step.

4

• Start the instrument cluster input/output

check mode.

• Inspect the water temperature gauge using

the check code 25.

• Is the water temperature gauge normal?

Yes

Inspect the PCM or connectors.

No

Go to the next step.

5

• Disconnect the negative battery cable.

• Measure the resistance between the DLC-2

terminals F and E.

• Is the resistance 54— 66 ohms?

Yes

Go to the next step.

No

Go to Step 7.

6

• Disconnect the negative battery cable.

• Inspect the DLC-2 terminals F and E for

short to power supply or GND.

• Is there any malfunction?

Yes

Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.

No

Replace the instrument cluster.

7

• Turn the ignition switch off.

• Inspect the instrument cluster connector

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

• Are the terminals normal?

Yes

Go to the next step.

No

Repair or replace the terminal.

8

• Disconnect the negative battery cable.

• Measure the resistance between the

instrument cluster connector terminals 2R
and 2T.

• Is the resistance 114— 126 ohms?

Yes

Inspect the wiring harness and CAN system-related module.
Repair or replace the malfunctioning part.

No

Replace the instrument cluster.

2A
2B

2C
2D

2E
2F

2G
2H

2I

2J

2K

2L

2M

2N

2W

2X

2U
2V

2S
2T

2Q
2R

2O

2P

1871-1U-06B(09-03C).fm 9 ページ ２００６年３月１５日 水曜日 午前１１時４４分