Suzuki XL7 2007 Service Manual page 280

1A-175 Engine General Information and Diagnosis:
3. Install a 3A fused jumper wire between the signal
circuit terminal A and ground. Verify the scan tool
Fuel Level Sensor-Left Tank voltage parameter is at
0.0 volts.
➢ If greater than the specified range, test the signal
circuit for a high resistance. If the circuit tests
normal, replace the ECM.
4. Install a 3A fused jumper wire between the signal
circuit terminal A and the low reference circuit
terminal D. Verify the scan tool Fuel Level Sensor-
Left Tank voltage parameter is at 0.0 volts.
➢ If greater than the specified range, test the low
reference circuit for a high resistance. If the circuit
tests normal, replace the ECM.
5. Remove the fuel tank.
6. Remove the fuel tank primary and secondary
modules and inspect for the following conditions:
– A clogged secondary fuel strainer and pick up
– A clogged or restricted siphon jet pump
– Broken, clogged or restricted flex tubes, primary
fuel tank module
– Broken, clogged, disconnected, or restricted fuel
transfer tube inside tank
➢ If you find any of the above conditions, repair as
necessary.
7. If all circuits/connections test normal, test or replace
the left/secondary fuel level sensor.
Component Testing
1. Ignition OFF, remove the left fuel level sender from
the fuel tank.
2. Connect a DMM between terminal A and terminal D.
3. Verify the secondary fuel level sender resistance
remains within 40-250 ohms and changes smoothly
while moving the float arm from stop to stop.
➢ If the resistance is outside the specified range or
changes erratically while moving the float arm from
stop to stop, replace the fuel level sender.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Fuel Tank Draining: "
• "Fuel Tank Replacement (FWD): " "Fuel Tank
Replacement (AWD): "
• "Primary Fuel Tank Module Replacement: "
• "Secondary Fuel Tank Module Replacement: "
• "Fuel System Cleaning: "
• "Control Module References: " for engine control
module replacement, setup, and programming
Symptoms - Engine Controls
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.
• "Diagnostic Procedure Instructions - Vehicle
Diagnostic Information: " provides an overview of
each diagnostic category.
Symptoms Description
Driveability symptoms do not set DTCs. The driveability
symptoms are defined below. Certain conditions can
cause multiple symptoms. These conditions are listed
together. Additional conditions that may only cause
certain symptoms are listed separately. Perform the
Symptoms Testing before using the Additional
Symptoms Tests.
Symptoms Definition
Backfire: Fuel ignites in the intake manifold or in the
exhaust system, making a loud popping noise.
Cuts Out, Misses: A steady pulsation or jerking that
follows engine speed, which is usually more
pronounced as the engine load increases. This
condition is not normally felt above 1500 RPM or 48
km/h (30 mph). The exhaust has a steady spitting
sound at idle or at low speed.
Detonation/Spark Knock: A mild to severe ping which
usually occurs worse while under acceleration. The
engine makes sharp metallic knocks that change
with throttle opening.
Dieseling, Run-On: Fuel ignites in the intake manifold
or in the exhaust system, making a loud popping
noise.
Hard Start: Engine cranks OK, but does not start for a
long time. The vehicle does eventually run, or may
start but immediately stalls.
Hesitation, Sag, Stumble: Momentary lack of
response as the accelerator is pushed down. This
condition can occur at any vehicle speed. This
condition is usually more pronounced when first
trying to make the vehicle move, as from a stop. This
condition may cause the engine to stall in severe
conditions.
Lack of Power, Sluggishness, or Sponginess: The
engine delivers less than expected power. Little or
no increase in speed when the accelerator pedal is
pushed down part way.
Poor Fuel Economy: Fuel economy, as measured by
an actual road test, is noticeably lower than
expected. Also, the fuel economy is noticeably lower
than it was on this vehicle at one time, as previously
shown by an actual road test.
Poor Fuel Fill Quality: Difficulty when refueling the
vehicle.