Suzuki XL7 2007 Service Manual page 219

Conditions for Setting the DTC
P0443
The ECM detects the EVAP canister purge solenoid
control circuit is open. The condition exists for 4 seconds
or a cumulative of 50 seconds.
P0458
The ECM detects the EVAP canister purge solenoid
control circuit is shorted to ground. The condition exists
for 4 seconds or a cumulative of 50 seconds.
P0459
The ECM detects the EVAP canister purge solenoid
control circuit is shorted to voltage. The condition exists
for 4 seconds or a cumulative of 50 seconds.
Diagnostic Aids
If the condition is intermittent, move the related
harnesses and connectors, with the engine operating,
while monitoring the circuit status for the component with
a scan tool. The circuit status parameter changes from
OK or Indeterminate to Fault if there is a condition with
the circuit or a connection.
Action Taken When the DTC Sets
DTC P0443, P0458 and P0459 are Type B DTCs.
Conditions for Clearing the DTC
DTC P0443, P0458 and P0459 are Type B DTCs.
Reference Information
Schematic Reference
"Engine Controls Schematics"
Connector End View Reference
• "Engine Control Module Connector End Views"
• "Engine Controls Connector End Views"
Description and Operation
"Evaporative Emission Control System Description: "
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
DTC Type Reference
"Powertrain Diagnostic Trouble Code (DTC) Type
Definitions"
Scan Tool Reference
• "Scan Tool Data List - Engine Controls - 3.6L (LY7)"
• "Scan Tool Data Definitions - Engine Controls - 3.6L
(LY7)"
• "Scan Tool Output Controls - Engine Controls - 3.6L
(LY7)"
Engine General Information and Diagnosis:
Circuit/System Verification
1. Ignition ON, command the EVAP purge solenoid to
50 % with a scan tool. You should hear an audible
click.
2. If the vehicle passes the Circuit/System Verification
test, then operate the vehicle within the conditions
for running the DTC. You may also operate the
vehicle within the conditions that are captured in the
Freeze Frame/Failure Records List.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at
the EVAP purge solenoid.
NOTE
The ignition circuit supplies voltage to other
components. Make sure you test all circuits
for a short to ground or test all components
for being shorted that share the ignition
circuit.
2. Ignition ON, verify that a test lamp illuminates
between the ignition voltage circuit terminal 1 and
ground.
➢ If the test lamp does not illuminate, test the ignition
voltage circuit for a short to ground or an open/high
resistance. If the circuit tests normal and the
ignition voltage circuit fuse is open, test all
components connected to the ignition voltage
circuit and replace as necessary.
3. Connect a test lamp between the control circuit
terminal 2 and the ignition voltage circuit terminal 1.
NOTE
The control circuit for the EVAP purge
solenoid is pulled-up to voltage within the
ECM, 2.6-4.6 volts on the control circuit is
normal.
4. Command the EVAP purge solenoid to 50 % and
then to 0 % with a scan tool. The test lamp should
illuminate or flash and then go OFF.
➢ If the test lamp is always ON, test the control circuit
for a short to ground. If the circuit tests normal,
replace the ECM.
➢ If the test lamp is always OFF, test the control
circuit for a short to voltage or an open/high
resistance. If the circuit tests normal, replace the
ECM.
5. Test for 2.6-4.6 volts between the control circuit
terminal 2 and the ECM housing.
➢ If the voltage is not within the specified range,
replace the ECM.
6. If all circuits test normal, test or replace the EVAP
purge solenoid.
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