Suzuki XL7 2007 Service Manual page 262

1A-157 Engine General Information and Diagnosis:
Circuit/System Description
The accelerator pedal assembly contains two
accelerator pedal position (APP) sensors. The APP
sensors are mounted in the pedal assembly and are not
serviceable. The APP sensors provide a signal voltage
that changes relative to the position of the accelerator
pedal. The engine control module (ECM) supplies a
separate 5-volt reference and low reference circuit for
each of the APP sensors.
The APP sensor 1 signal voltage increases as the pedal
is depressed, from approximately 1.0 volt at rest to
approximately 4 volts when fully depressed. The APP
sensor 2 signal voltage increases as the pedal is
depressed, from approximately 0.5 volt at rest to
approximately 2 volts with the accelerator pedal fully
depressed.
Conditions for Running the DTCs
• The ignition is ON or the engine is operating.
• The ignition voltage is more than 7 volts.
• The DTCs run continuously once the above conditions
are met.
Conditions for Setting the DTC
P2122
The APP sensor 1 voltage is less than 0.86 volts for
more than 200 milliseconds.
P2123
The APP sensor 1 voltage is more than 4.82 volts for
more than 200 milliseconds.
P2127
The APP sensor 2 voltage is less than 0.63 volts for
more than 200 milliseconds.
P2128
The APP sensor 2 voltage is more than 4.82 volts for
more than 200 milliseconds.
P2138
• The ECM detects that the voltage difference between
APP sensor 1 and 2 is more than 0.46 volts.
• The ECM detects that the voltage difference between
APP sensor 1 and 2 is more than 0.58 volts with a
partially pressed pedal.
• The ECM detects that the voltage difference between
APP sensor 1 and 2 is more than 3.4 volts with a fully
pressed pedal.
• Any of the above conditions exist for more than 240
milliseconds.
Action Taken When the DTC Sets
DTCs P2122, P2123, P2127, P2128, and P2138 are
Type A DTCs.
Conditions for Clearing the DTC
DTCs P2122, P2123, P2127, P2128, and P2138 are
Type A DTCs.
Diagnostic Aids
Test the current out-put of the 5-volt reference circuits if
you suspect high resistance in the circuit. The current
out-put should be greater than 80 mA for APP 1 and
greater than 50 mA for APP 2.
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
"Throttle Actuator Control (TAC) 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)"
Circuit/System Verification
1. Ignition ON, observe the DTC information with a
scan tool. DTC P0652, P0653, P0698, or P0699
should not be set.
➢ If a DTC is set, refer to "DTC P0652 or P0653" or
"DTC P0698 or P0699".
2. Observe the APP Sensor voltage parameters with a
scan tool. Verify both of the APP sensor voltages are
between 0.4-4.5 volts.
3. Rapidly depress the accelerator pedal from the rest
position to the wide open throttle position (WOT) and
release pedal. Repeat the procedure several times.
DTCs P2122, P2123, P2127, P2128, or P2138
should not set.
4. Slowly depress the accelerator pedal to WOT and
then slowly return the pedal to closed throttle.
Repeat the procedure several times. DTCs P2122,
P2123, P2127, P2128, or P2138 should not set.
5. 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 Data List.