Mazda CX-7 2007 Workshop Manual page 1358

ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER]
DTC B1202[INSTRUMENT CLUSTER]
DTC B1202 Fuel gauge sender unit circuit malfunction (open circuit)
DETECTION
• The resistance between instrument cluster and fuel gauge sender unit is more than 600 ohms for 5 s.
CONDITION
• Open circuit in wiring harness between instrument cluster and fuel gauge sender unit
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
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?
09-02E–2
C A
2WD
AWD
A B
FUEL GAUGE SENDER
UNIT WIRING HARNESS-
SIDE CONNECTOR
C A
D B
INSPECTION
INSTRUMENT CLUSTER
2U
2W
INSTRUMENT CLUSTER WIRING
HARNESS-SIDE CONNECTOR
2W 2U 2S 2Q 2O
2X 2V 2T 2R 2P
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.
id0902e8840200
2M 2K 2I 2G 2E 2C 2A
2N 2L 2J 2H 2F 2D 2B
ACTION