DTC B1204 [INSTRUMENT CLUSTER]

id0902e8840300

DTC B1204

Fuel gauge sender unit circuit malfunction (short to ground)
DETECTION CONDITION
•  The resistance between instrument cluster and fuel gauge sender unit is less than 6 ohms for 5 s
POSSIBLE CAUSE
•  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
•  Fuel gauge sender unit malfunction
•  Instrument cluster malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT FUEL GAUGE
•  Perform the check code 23 inspection.
•  Is there any malfunction?
Yes
Replace the instrument cluster.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Go to the next step.
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?
Yes
Repair or replace the malfunctioning part.
No
Go to the next step.
3
INSPECT FUEL GAUGE SENDER UNIT CONNECTOR
•  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?
Yes
Repair or replace the malfunctioning part.
No
Go to the next step.
4
INSPECT WIRING HARNESS
•  Inspect for continuity between following terminals:
―   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?
Yes
Repair or replace the wiring harness.
No
Go to the next step.
5
INSPECT WIRING HARNESS
•  Inspect for continuity between following terminals:
―   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?
Yes
Repair or replace the wiring harness.
No
Inspect the fuel gauge sender unit and fuel gauge sender sub-unit.
(See FUEL GAUGE SENDER UNIT INSPECTION.)
•  Repair or replace if necessary.