Suzuki XL7 2007 Service Manual page 205

Conditions for Running the DTC
• DTCs P0121, P0122, P0123, P0221, P0222, P0223,
P0335, P0336, or P0338 are not set.
• The engine speed is between 420-7,000 RPM and
steady.
• The engine run time is more than 45 seconds.
• The evaporative emissions (EVAP) leak detection is
not active.
• The delivered torque signal is more than 10 percent at
idle.
• The delivered torque signal is between 9-30 percent
with the transmission in drive.
• The intake air temperature (IAT) is more than −30°C
(−22°F).
• The A/C compressor clutch is not changing states.
• The torque management is not active.
• The antilock brake system/traction control system
(ABS/TCS) is not active.
• The ECM is not receiving a rough road signal.
• The fuel level is more than 12 percent.
• The ECM is not in fuel cut-off or decel fuel cut-off
mode.
• The throttle angle is steady.
• DTCs P0300 through P0306 run continuously when
the above conditions exist for at least 1000 engine
revolutions.
Conditions for Setting the DTC
P0300
The ECM detects a crankshaft rotation speed variation
indicating a misfire rate sufficient to cause emissions
levels to exceed a predetermined value for more than 4
seconds or for a cumulative of 50 seconds.
P0301, P0302, P0303, P0304, P0305, P0306
The ECM detects a crankshaft rotation speed variation
indicating a single cylinder misfire rate sufficient to cause
emissions levels to exceed mandated standards for
more than 4 seconds or for a cumulative of 50 seconds.
Action Taken When the DTC Sets
DTCs P0300, P0301, P0302, P0303, P0304, P0305,
and P0306 are Type A (MIL flashing) or Type B1 DTCs.
Engine General Information and Diagnosis:
Conditions for Clearing the DTC
DTCs P0300, P0301, P0302, P0303, P0304, P0305,
and P0306 are Type A (MIL flashing) or Type B1 DTCs.
Diagnostic Aids
• A misfire DTC could be caused by an excessive
vibration from sources other than the engine. Inspect
for the following possible sources:
– A tire or wheel that is out of round or out of balance
– Variable thickness brake rotors
– An unbalanced drive shaft
– Certain rough road conditions
– Transmission operation
– A damaged accessory drive component or belt
• High resistance in the circuits of the injectors could set
a misfire DTC without setting an injector DTC. Test the
injector circuits of the affected cylinder(s) for a high
resistance if you suspect a condition.
Reference Information
Schematic Reference
"Engine Controls Schematics"
Connector End View Reference
• "Engine Control Module Connector End Views"
• "Engine Controls Connector End Views"
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)"
Special Tools Required
J 26792 HEI Spark Tester
1A-100