Mazda CX-7 2007 Workshop Manual page 1359

ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER]
STEP
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?
End Of Sie
DTC B1204[INSTRUMENT CLUSTER]
DTC B1204 Fuel gauge sender unit circuit malfunction (short to GND)
DETECTION
• The resistance between instrument cluster and fuel gauge sender unit is less than 6 ohms for 5 s.
CONDITION
• 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
POSSIBLE
• Fuel gauge sender unit malfunction
CAUSE
• Instrument cluster malfunction
FUEL GAUGE SENDER UNIT
FUEL GAUGE SENDER SUB-UNIT
FUEL GAUGE SENDER SUB-
UNIT WIRING HARNESS-
SIDE CONNECTOR
B A
INSPECTION
C A
2WD
AWD
A B
FUEL GAUGE SENDER
UNIT WIRING HARNESS-
SIDE CONNECTOR
C A
D B
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.
INSTRUMENT CLUSTER
2U
2W
INSTRUMENT CLUSTER WIRING
HARNESS-SIDE CONNECTOR
2W 2U 2S 2Q 2O
2X 2V 2T 2R 2P
ACTION
id0902e8840300
2M 2K 2I 2G 2E 2C 2A
2N 2L 2J 2H 2F 2D 2B
09-02E–3
09-02E