Mazda CX-7 2007 Workshop Manual page 1360

ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER]
Diagnostic procedure
STEP
1 INSPECT FUEL GAUGE
• Perform the check code 23 inspection.
• Is there any malfunction?
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?
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?
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?
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?
End Of Sie
09-02E–4
INSPECTION
Yes Replace the instrument cluster.
No Go to the next step.
Yes Repair or replace the malfunctioning part.
No Go to the next step.
Yes Repair or replace the malfunctioning part.
No Go to the next step.
Yes Repair or replace the wiring harness.
No Go to the next step.
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.
ACTION