Subaru IMPREZA 2004 Service Manual page 48

ENGINE (DIAGNOSTICS)
4. DRIVE ACCORDING TO THE FOLLOWING DRIVE PATTERN
Vehicle speed km/h (MPH)
96 (60)
65 (40)
0
(A) Idle engine for 1 minute.
(B) Accelerate to 96 km/h (60 MPH)
within 20 seconds.
(C) Drive vehicle at 96 km/h (60 MPH)
for 20 seconds.
DTC
*P0030 HO2S Heater Control Circuit (Bank 1 Sensor 1)
Air Assisted Injector Control Circuit High
P0067
Intake Air Temperature Circuit Range/Performance
*P0111
*P0121 Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance
O Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0130
2
O Sensor Circuit Slow Response (Bank 1 Sensor 2)
*P0139
2
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0400 Exhaust gas recirculation flow
P0559 Generator Circuit High Input
*P1134 A/F Sensor Micro-Computer Problem
P1492 EGR Solenoid Valve Signal #1 Circuit Malfunction (Low Input)
P1493 EGR Solenoid Valve Signal #1 Circuit Malfunction (High Input)
P1494 EGR Solenoid Valve Signal #2 Circuit Malfunction (Low Input)
P1495 EGR Solenoid Valve Signal #2 Circuit Malfunction (High Input)
P1496 EGR Solenoid Valve Signal #3 Circuit Malfunction (Low Input)
P1497 EGR Solenoid Valve Signal #3 Circuit Malfunction (High Input)
P1498 EGR Solenoid Valve Signal #4 Circuit Malfunction (Low Input)
P1499 EGR Solenoid Valve Signal #4 Circuit Malfunction (High Input)
Drive Cycle
50
100
(D) Decelerate with fully closed throt-
tle to 65 km/h (40 MPH).
(E) Drive vehicle at 65 km/h (40 MPH)
for 10 seconds.
Item
EN(H4SO)(diag)-46
(Seconds)
150
(F) Accelerate to 96 km/h (60 MPH)
within 10 seconds.
(G) Stop vehicle with throttle fully
closed.
Condition
—
Coolant temperature at start is
less than 60°C (140°F).
Coolant temperature at start is
less than 30°C (86°F).
—
—
—
Diagnosis frequency is different
from misfire ratio.
Diagnosis frequency is different
from misfire ratio.
Diagnosis frequency is different
from misfire ratio.
Diagnosis frequency is different
from misfire ratio.
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EN-00195