Suzuki Swift Sport 2004 Service & Repair Manual page 212

1A-162 Engine General Information and Diagnosis:
DTC Troubleshooting
NOTE
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to "Inspection of ECM and Its Circuits".
• Upon completion of inspection and repair work, perform "DTC Confirmation Procedure" and
confirm that the trouble has been corrected.
Step
1 Was "Engine and Emission Control System Check"
performed?
2 APP sensor mounting check
1) Check that APP sensor has been mounted to vehicle
body properly (no pinched floor carpet, etc.).
Is it OK?
3 APP sensor (main) and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Turn ON ignition switch, check "APP Sensor 1 Volt"
displayed on scan tool.
Is displayed voltage 4.75 V or more?
4 ECM voltage check
1) Disconnect connector from APP sensor with ignition
switch turned OFF.
2) Check for proper connection to APP sensor at "BRN",
"GRN" and "BLU" wire terminals.
"RED"
3) If OK, measure voltage between "BRN" wire terminal of
APP sensor assembly connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V?
5 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "E23-
35" terminal.
3) If OK, measure voltage between "E23-35" terminal of
ECM connector and engine ground with ignition switch
turned ON.
Is voltage 0 V?
Action
"BRN"
"YEL"
"BLU"
"WHT"
"GRN"
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 6.
I4RS0B110048-01
Substitute a known-
good ECM and recheck.
No
Go to "Engine and
Emission Control
System Check".
Reinstall APP sensor
properly referring to
"APP Sensor Assembly
Removal and
Installation in Section
1C".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00"
Go to Step 5.
"BRN" wire is shorted to
power circuit.