Step 9
Check whether there is exhaust leakage.
Yes
Repair the faulty part. Go to step 11
No
Step 10
Replace the post-catalytic oxygen sensor. Refer to
Post-Catalytic Oxygen Sensor Replacement
Next
Step 11
Use scan tool to confirm whether the DTC code is stored again.
(a)
Connect scan tool to the datalink connector.
(b)
Turn the ignition switch to "ON" position.
(c)
Clear DTC code.
(d)
Start and run the engine at idle speed to warm up the engine
for at least 5 min.
(e)
Road test the vehicle for at least 10 min.
(f)
Read control system DTC code again to confirm that the
system has no DTC code.
No
Intermittent Fault. Refer to
Yes
Step 12
Diagnostic completed.
2.2.7.33 DTC P0444 P0458 P0459
1. DTC Descriptor:
DTC
P0444
Canister Control Valve Control Circuit Open
DTC
P0458
Canister Control Valve Control Circuit Voltage Too Low
DTC
P0459
Canister Control Valve Control Circuit Voltage Too High
EVAP solenoid valve absorbs fuel vapor from the evaporative emission canister to the intake manifold. EVAP solenoid valve is
controlled by the pulse width modulation (PWM). The circuit consists of:
–
Operating Voltage: Battery voltage passes through ECM controlled main relay terminal No.3 to reach EVAP solenoid harness
connector EN24 terminal No.1.
–
ECM control circuit: EVAP solenoid valve wiring harness connector EN24 terminal No.2 is connected to ECM harness connector
EN01 terminal No.37. ECM has an internal driver circuit to control the solenoid valve ground. Driver circuit is equipped with a
ECM feedback circuit. ECM monitors the feedback voltage to determine whether the control circuit is open, short to ground or
short to power supply.
Engine
Control System JL4G18-D
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EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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