Subaru Impreza 2003 Service Manual page 3060

INSTRUMENTATION/DRIVER INFO
B: INSPECTION
CAUTION:
When measuring voltage and resistance of the ECM, TCM, or each sensor, use a tapered pin with a
diameter of less than 0.64 mm (0.025 in) in order to avoid poor contact. Do not insert the pin more
than 2 mm (0.08 in).
1. SYMPTOM CHART
Symptom
Combination meter assembly does not operate.
Speedometer does not operate.
Tachometer does not operate.
Fuel gauge does not operate.
Water temperature gauge does not operate.
Outside temperature indicator does not operate.
COMBINATION METER SYSTEM
(1) Power supply
(2) Ground circuit
(1) (MT model) Vehicle speed sensor
(AT model) TCM
(2) Harness
(3) Speedometer
(1) ECM
(2) Harness
(3) Tachometer
(1) Fuel level sensor
(2) Harness
(3) Fuel gauge
(1) Engine coolant temperature sensor
(2) Harness
(3) Water temperature gauge
(1) Ambient sensor
(2) Harness
(3) Combination meter
(4) Auto A/C control module
IDI-4
Repair order Reference
<Ref. to IDI-5, CHECK
POWER SUPPLY AND
GROUND CIRCUIT,
INSPECTION, Combi-
nation Meter System.>
MT model: <Ref. to IDI-
6, CHECK VEHICLE
SPEED SENSOR,
INSPECTION, Combi-
nation Meter System.>
AT model: <Ref. to IDI-
7, CHECK TRANSMIS-
SION CONTROL MOD-
ULE (TCM),
INSPECTION, Combi-
nation Meter System.>
<Ref. to IDI-8, CHECK
ENGINE CONTROL
MODULE (ECM),
INSPECTION, Combi-
nation Meter System.>
<Ref. to IDI-9, CHECK
FUEL LEVEL SEN-
SOR, INSPECTION,
Combination Meter
System.>
<Ref. to IDI-11, CHECK
ENGINE COOLANT
TEMPERATURE SEN-
SOR, INSPECTION,
Combination Meter
System.>
<Ref. to IDI-12, CHECK
OUTSIDE TEMPERA-
TURE INDICATOR,
INSPECTION, Combi-
nation Meter System.>