Suzuki XL7 2007 Service Manual page 186

1A-81 Engine General Information and Diagnosis:
Circuit/System Verification
1. Ignition ON, observe the DTC information with a
scan tool. DTC P0698 or P0699 should not be set.
➢ If a DTC is set, refer to "DTC P0698 or P0699".
2. Clear the DTC Info with a scan tool.
3. Start the engine, observe the scan tool TP Sensor 1
and 2 voltage parameters. TP sensor 1 should be
between 0.17-4.6 volts and TP sensor 2 should be
between 0.15-4.8 volts.
4. Observe the scan tool TP sensor 1 and 2 parameters
while performing the following tests:
– Rapidly depress the accelerator pedal from the
rest position to the wide open throttle position
(WOT) and release pedal. Repeat the procedure
several times.
– Slowly depress the accelerator pedal to WOT and
then slowly return the pedal to closed throttle.
Repeat the procedure several times.
The TP sensor 1 and 2 parameter should display
Agree.
5. Observe the DTC Information with a scan tool. DTCs
P0121, P0122, P0123, P0221, P0222, and P0223
should not set.
Circuit/System Testing
1. Ignition OFF, remove the fuse that supplies B+ to
terminal C2-56 of the ECM.
2. Disconnect the throttle body harness connector.
NOTE
The control module or the sensor may be
damaged if the circuit is shorted to battery
positive voltage.
3. Test for 5 ohms or less between the low reference
circuit terminal C and ground.
➢ If greater than the specified value, test the low
reference circuit for a short to voltage or an open/
high resistance. If the circuit tests normal, replace
the ECM.
4. Install fuse that supplies B+ to terminal C2-56 of the
ECM.
5. Ignition ON, load test for 4.8-5.2 volts between the
test lamp probe connected to the 5-volt reference
circuit terminal E and ground.
NOTE
The 5-volt reference circuits are internally
and externally connected at the ECM. Other
component DTCs may be set. If other DTCs
are set, review the electrical schematic and
diagnose the applicable circuits and
components.
➢ If less than the specified range, test the 5-volt
reference circuit for a short to ground or an open/
high resistance. If the circuit tests normal, replace
the ECM.
➢ If greater than the specified range, test the 5-volt
reference circuit for a short to voltage. If the circuit
tests normal, replace the ECM.
6. Ignition ON, verify that the scan tool TP sensor 1
voltage parameter is less than 0.3 volt.
➢ If greater than the specified value, test the signal
circuit for a short to voltage. If the circuit tests
normal, replace the ECM.
7. Connect a 3A fused jumper wire between the 5 volt
reference circuit terminal E and the TP sensor 1
signal circuit terminal D. Verify the scan tool TP
sensor 1 voltage parameter is greater than 4.89
volts.
➢ If less than the specified value, test the signal
circuit for an open/high resistance or for a short to
ground. If the circuit tests normal, replace the ECM.
8. Verify the scan tool TP sensor 2 voltage parameter is
greater than 4.97 volts.
➢ If less than the specified value, test the signal
circuit for a short to ground. If the circuit tests
normal, replace the ECM.
NOTE
If the fuse in the jumper wire opens, the
signal circuit is shorted to a voltage.
9. Connect a 3A fused jumper wire between the TP
sensor 2 signal circuit terminal F and the low
reference circuit terminal C. Verify the TP sensor 2
voltage parameter is less than 0.10 volt.
➢ If greater than the specified value, test the signal
circuit for an open/high resistance or for a short to
voltage. If the circuit tests normal, replace the ECM.
10. If all circuits test normal, replace the throttle body
assembly.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
• "Throttle Body Assembly Replacement: "
• "Control Module References: " for engine control
module replacement, setup, and programming