Mazda CX 7. Manual — part 356
SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]
09-03C–3
09-03C
NO. 1 FUEL GAUGE NEEDLE POSITION INCORRECT[INSTRUMENT CLUSTER]
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Diagnostic procedure
End Of Sie
NO. 2 ALL METERS AND GAUGES DO NOT OPERATE[INSTRUMENT CLUSTER]
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Diagnostic procedure
1
Fuel gauge needle position incorrect
POSSIBLE
CAUSE
• Fuel gauge sender unit malfunction
• Instrument cluster malfunction
• Connector or pin malfunction
• Fuel gauge sender unit is improperly installed
• Open or short circuit in wiring harness between instrument cluster and GND
• Open or short circuit in wiring harness between instrument cluster and fuel gauge sender unit
STEP
INSPECTION
ACTION
1
• Turn the ignition switch to the ON position.
• Verify that the fuel gauge needle does not
move after ignition switch is turned off, or the
display does not indicate F even though fuel
tank is full.
• Is the fuel gauge normal?
Yes
Troubleshooting completed.
No
Go to the next step.
2
• Inspect the DTC for the instrument cluster
ON-BOARD DIAGNOSTIC SYSTEM.
• Have DTCs B1202 or B1204 been recorded
in memory?
Yes
Perform the recorded DTC’s troubleshooting.
(See 09-02E-1 DTC TABLE[INSTRUMENT CLUSTER].)
No
Go to the next step.
3
• Perform the check code 23 inspection.
• Is there any malfunction?
Yes
Replace the instrument cluster.
No
Go to the next step.
4
• Perform the check code 22 inspection.
• Is there any malfunction?
Yes
Go to the next step.
No
Go to Step 6.
5
• 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
Replace the instrument cluster.
No
Repair or replace the terminal.
6
• Turn the ignition switch off.
• Inspect the fuel gauge sender unit 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.
7
• Turn the ignition switch off.
• Is the fuel gauge sender unit installed
properly?
Yes
Inspect the fuel gauge sender unit.
No
Reinstall the fuel gauge sender unit.
2
All meters and gauges do not operate
POSSIBLE
CAUSE
• Instrument cluster malfunction
• Connector or pin malfunction
• Fuse malfunction
• Open or short circuit in power supply (IG1) wiring harness
• Open or short circuit in GND wiring harness
STEP
INSPECTION
ACTION
1
• Turn the ignition switch to the ON position.
• Inspect the following:
— Does the odometer/tripmeter illuminate?
— Does the fuel gauge operate?
— Does the MIL turn off within approx. 3 s?
Yes
Troubleshooting completed.
No
Go to the next step.
2
• Inspect the METER fuse.
• Is the fuse normal?
Yes
Go to the next step.
No
Replace the fuse.
• If the fuse is melted, inspect the wiring harness for a
short to ground. Repair or replace the wiring harness,
then replace the fuse.
3
• Inspect the DTC for the instrument cluster
ON-BOARD DIAGNOSTIC SYSTEM.
• Have any DTCs been recorded in memory?
Yes
Perform the recorded DTC’s troubleshooting.
(See 09-02E-1 DTC TABLE[INSTRUMENT CLUSTER].)
No
Go to the next step.
1871-1U-06B(09-03C).fm 3 ページ 2006年3月15日 水曜日 午前11時44分
SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]
09-03C–4
End Of Sie
NO. 3 ABS WARNING LIGHT ILLUMINATES[INSTRUMENT CLUSTER]
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Diagnostic procedure
4
• Turn the ignition switch to LOCK position.
• Remove the instrument cluster.
• Disconnect the instrument cluster connector.
• Inspect the voltage between instrument
cluster wiring harness-side connector
terminal 2G and terminal 2C.
• Turn the ignition switch to the ON position.
• Is the voltage B+?
Yes
Go to the next step.
No
Inspect the suspect wiring harness, then repair or replace.
5
• 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
Replace the instrument cluster.
No
Repair or replace the terminal.
STEP
INSPECTION
ACTION
2A
2B
2C
2D
2E
2F
2G
2H
2I
2J
2K
2L
2M
2N
2W
2X
2U
2V
2S
2T
2Q
2R
2O
2P
3
ABS warning light illuminates
POSSIBLE
CAUSE
• DSC HU/CM 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 ABS warning light turn off?
Yes
Troubleshooting completed.
No
Go to the next step.
2
• Inspect the DTC for the instrument cluster
ON-BOARD DIAGNOSTIC SYSTEM.
• Has DTC U2064 been recorded in memory?
Yes
Inspect the DTC for the DSC HU/CM.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
No
Go to the next step.
3
• 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 5.
4
• 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.
5
• 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.
6
• 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 4 ページ 2006年3月15日 水曜日 午前11時44分
SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]
09-03C–5
09-03C
End Of Sie
NO. 4 MIL ILLUMINATES[INSTRUMENT CLUSTER]
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Diagnostic procedure
End Of Sie
NO. 5 BRAKE SYSTEM WARNING LIGHT ILLUMINATES[INSTRUMENT CLUSTER]
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Diagnostic procedure
4
MIL illuminates
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 MIL turn off?
Yes
Troubleshooting completed.
No
Go to the next step.
2
• Inspect the DTC for the instrument cluster
ON-BOARD DIAGNOSTIC SYSTEM.
• Have DTCs U2064 or U2023 been recorded
in memory?
Yes
Inspect the DTC for the PCM.
(See 01-02-7 ON-BOARD DIAGNOSTIC TEST[L3 WITH
TC].)
No
Go to the next step.
3
• 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 5.
4
• 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.
5
• 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.
6
• 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
5
Brake system warning light illuminates
POSSIBLE
CAUSE
• DSC HU/CM malfunction
• Brake fluid level sensor malfunction
• Parking brake switch 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.
• Release the parking brake.
• Does the brake system warning light turn
off?
Yes
Troubleshooting completed.
No
Go to the next step.
2
• Does the brake fluid need replenishment?
Yes
Add brake fluid.
No
Go to the next step.
1871-1U-06B(09-03C).fm 5 ページ 2006年3月15日 水曜日 午前11時44分
SYMPTOM TROUBLESHOOTING [INSTRUMENT CLUSTER]
09-03C–6
End Of Sie
NO. 6 INSTRUMENT CLUSTER ILLUMINATION DOES NOT ILLUMINATE[INSTRUMENT CLUSTER]
id0903d5807900
Diagnostic procedure
End Of Sie
3
• Inspect the DTC for the instrument cluster
ON-BOARD DIAGNOSTIC SYSTEM.
• Has DTC U2023 been recorded in memory?
Yes
Inspect the DTC for the DSC HU/CM.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
No
Go to the next step.
4
• Inspect the brake fluid level sensor, parking
brake switch or connectors.
• Is there any malfunction?
Yes
Repair or replace malfunctioning part.
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.
STEP
INSPECTION
ACTION
2A
2B
2C
2D
2E
2F
2G
2H
2I
2J
2K
2L
2M
2N
2W
2X
2U
2V
2S
2T
2Q
2R
2O
2P
6
Instrument cluster illumination does not illuminate
POSSIBLE
CAUSE
• Instrument cluster malfunction
• Connector or pin malfunction
• Fuse malfunction
STEP
INSPECTION
ACTION
1
• Turn the light switch to the TNS position.
• Does the instrument cluster illumination turn
on?
Yes
Troubleshooting completed.
No
Go to the next step.
2
• Does the non-illumination include the entire
instrument cluster?
Yes
Go to the next step.
No
Replace the instrument cluster.
3
• Inspect the ROOM and ILLUMI fuse.
• Are the fuses normal?
Yes
Go to the next step.
No
Replace the fuse.
• If the fuse is melted, inspect the wiring harness for short
to ground. Repair or replace the wiring harness, then
replace the fuse.
4
• 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
Replace the instrument cluster.
No
Repair or replace the terminal.
1871-1U-06B(09-03C).fm 6 ページ 2006年3月15日 水曜日 午前11時44分
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