Suzuki XL7 2007 Service Manual page 203

Circuit/System Description
The control module enables the appropriate fuel injector
on the intake stroke for each cylinder. Ignition voltage is
supplied directly to the fuel injectors. The control module
controls each fuel injector by grounding the control
circuit with a solid state device called a driver. The
control module monitors the status of each driver. Each
driver has a feedback voltage circuit which the engine
control module (ECM) monitors. The injector control
circuits are pulled-up to voltage within the ECM. The
ECM can determine if a control circuit is open, shorted to
ground, or shorted to a voltage by monitoring the
feedback voltage.
Conditions for Running the DTC
• The engine speed is more than 80 RPM.
• The ignition voltage is between 10-18 volts.
• The injector has been commanded ON and OFF at
least once.
• The DTCs run continuously once the above conditions
are met.
Conditions for Setting the DTC
P0201, P0202, P0203, P0204, P0205, or P0206
The ECM detects the injector control circuit is open for
greater than 4 seconds or for a cumulative of 50
seconds.
P0261, P0264, P0267, P0270, P0273, or P0276
The ECM detects the injector control circuit is shorted to
ground for greater than 4 seconds or for a cumulative of
50 seconds.
P0262, P0265, P0268, P0271, P0274, or P0277
The ECM detects the injector control circuit is shorted to
voltage for greater than 4 seconds or for a cumulative of
50 seconds.
Action Taken When the DTC Sets
DTCs P0201, P0202, P0203, P0204, P0205, P0206,
P0261, P0262, P0264, P0265, P0267, P0268, P0270,
P0271, P0273, P0274, P0276, and P0277 are Type B
DTCs.
Conditions for Clearing the DTC
DTCs P0201, P0202, P0203, P0204, P0205, P0206,
P0261, P0262, P0264, P0265, P0267, P0268, P0270,
P0271, P0273, P0274, P0276, and P0277 are Type B
DTCs.
Diagnostic Aids
• Performing the fuel injector coil test may help isolate
an intermittent condition. Refer to "Fuel Injector
Solenoid Coil Test: ".
• 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.
Engine General Information and Diagnosis:
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)"
Circuit/System Verification
1. Observe the Misfire Current Counters with a scan
tool. The Misfire Current Counters should not be
incrementing
2. Engine operating, observe the DTC information with
a scan tool. DTCs P0201, P0202, P0203, P0204,
P0205, P0206, P0261, P0262, P0264, P0265,
P0267, P0268, P0270, P0271, P0273, P0274,
P0276, and P0277 should not set.
Circuit/System Testing
NOTE
Disconnecting the multi-way harness
connector causes DTCs P0201-P0206 fuel
injector circuit open DTCs to set.
1. Ignition OFF, disconnect the fuel injector multi-way
harness connector.
2. Ignition ON, connect a test lamp between the
appropriate ignition voltage supply circuit on the
ECM side of the multi-way connector and ground.
Verify that the test lamp illuminates.
NOTE
The ignition voltage circuits supply 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.
➢ If the test lamp does not illuminate and the fuse is
open, repair the appropriate ignition circuit for a
short to ground between the corresponding fuel
injectors and the fuse. Replace the fuse.
1A-98