Dtc P0443, P0458, Or P0459 - Suzuki XL7 2007 Service Manual

1A-113 Engine General Information and Diagnosis:
7. Command the EVAP vent solenoid closed with a
scan tool.
8. Use the remote switch to introduce smoke into the
EVAP system.
9. Verify the entire EVAP system with the J 41413-SPT.
Smoke should not be observed.
➢ If smoke is observed, repair the condition as
necessary.
10. Verify the individual EVAP system components for a
leak using the J 41413-300. The EVAP system
components should not leak.
➢ If a condition is found replace the affected
component.

DTC P0443, P0458, or P0459

Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle Diagnostic Information: " prior to using this diagnostic procedure.
• Review "Strategy Based Diagnosis: " for an overview of the diagnostic approach.
• The "Diagnostic Procedure Instructions - Vehicle Diagnostic Information: " provide an overview of each diagnostic
category.
DTC Descriptors
DTC P0443: Evaporative Emission (EVAP) Purge Solenoid Control Circuit
DTC P0458: Evaporative Emission (EVAP) Purge Solenoid Control Circuit Low Voltage
DTC P0459: Evaporative Emission (EVAP) Purge Solenoid Control Circuit High Voltage
Diagnostic Fault Information
Circuit
Ignition Voltage
EVAP Canister Purge Valve Control Circuit
Circuit/System Description
The evaporative emission (EVAP) canister purge valve
is used to purge fuel vapor from the EVAP canister to the
intake manifold. The EVAP canister purge valve is pulse
width modulated (PWM). Ignition voltage is supplied
directly to the EVAP canister purge valve. The engine
control module (ECM) controls the solenoid by
grounding the control circuit with a solid state device
called a driver. The driver is equipped with a feedback
circuit that is pulled-up to a voltage. The ECM can
determine if the control circuit is open, shorted to
ground, or shorted to a voltage by monitoring the
feedback voltage.
Repair Instructions
• "Fuel Tank Pressure Sensor Replacement: "
• "Evaporative Emission Canister Purge Solenoid Valve
Replacement: "
• "Evaporative Emission Canister Vent Solenoid Valve
Replacement: "
• "Evaporative Emission Pipe Replacement: "
• "Evaporative Emission Canister Replacement: "
Repair Verification
1. Turn the nitrogen/smoke valve to nitrogen.
2. Command the EVAP vent valve closed with a scan
tool.
3. Use the remote switch to activate the J 41413-200.
4. Use the remote switch to introduce nitrogen and fill
the EVAP system until the floating indicator
stabilizes.
5. Verify the flow meter's stable floating indicator
position is at or below the red flag.
6. Clear the DTCs with a scan tool.
Short to Open/High
Ground Resistance
P0458 P0443
P0458 P0443
Conditions for Running the DTC
• The ignition is ON or the engine is operating.
• The engine speed is more than 80 RPM.
• The ignition voltage is between 10-18 volts.
• The ECM has commanded the EVAP canister purge
valve ON and OFF at least once during the ignition
cycle.
• The DTCs run continuously once the above conditions
are met.
Signal
Short to Voltage
Performance
—
P0459
—
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