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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

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

• Start the engine, and drive the vehicle.

— Does the speedometer needle move

smoothly?

— Does the speedometer needle indicate

correct speed?

Yes

Troubleshooting completed.

Go to the next step.

• Inspect the DTC for the instrument cluster

ON-BOARD DIAGNOSTIC SYSTEM.

• Has DTC U2023 been recorded in memory?

Yes

Go to the next step.

Go to Step 4.

• 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].)

Go to the next step.

• 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.

Replace the instrument cluster.

• 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.

Go to Step 7.

• 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.

Replace the instrument cluster.

• 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.

Repair or replace the terminal.

• 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.

Replace the instrument cluster.

2A
2B

2C
2D

2E
2F

2G
2H

2U
2V

2S
2T

2Q
2R

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

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

• Start the engine.

— Does the tachometer needle move

smoothly?

— Does the tachometer needle indicate

correct engine speed?

Yes

Troubleshooting completed.

Go to the next step.

• Inspect the DTC for the instrument cluster

ON-BOARD DIAGNOSTIC SYSTEM.

• Has DTC U2023 been recorded in memory?

Yes

Go to the next step.

Go to Step 4.

• 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].)

Go to the next step.

• 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.

Replace the instrument cluster.

• 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.

Go to Step 7.

• 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.

Replace the instrument cluster.

• 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.

Repair or replace the terminal.

• 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.

Replace the instrument cluster.

2A
2B

2C
2D

2E
2F

2G
2H

2U
2V

2S
2T

2Q
2R

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

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

• Start the engine.

• Does the water temperature gauge needle

move to medium range gradually and stay
there?

Yes

Troubleshooting completed.

Go to the next step.

• Inspect the DTC for the instrument cluster

ON-BOARD DIAGNOSTIC SYSTEM.

• Has DTC U2023 been recorded in memory?

Yes

Go to the next step.

Go to Step 4.

• 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].)

Go to the next step.

• 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.

Go to the next step.

• 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.

Go to Step 7.

• 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.

Replace the instrument cluster.

• 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.

Repair or replace the terminal.

• 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.

Replace the instrument cluster.

2A
2B

2C
2D

2E
2F

2G
2H

2U
2V

2S
2T

2Q
2R

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

Content .. 355 356 357 358 ..