Suzuki Swift Sport 2004 Service & Repair Manual page 203

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 Throttle actuator circuit check
1) Disconnect connectors from electric throttle body and
ECM with ignition switch turned OFF.
2) Check for proper connection of electric throttle body and
ECM connectors at "LT GRN/RED" wire, "LT GRN/BLK"
wire. "C37-45" and "C37-44" terminals.
"LT GRN/BLK"
"LT GRN/RED"
3) Turn ON ignition switch.
4) Measure voltage between "LT GRN/RED" wire terminal
of electric throttle body connector and engine ground,
between "LT GRN/BLK" wire terminal of electric throttle
body connector and engine ground.
Is voltage 0 V?
3 Throttle actuator circuit check
1) Turn OFF ignition switch.
2) Measure resistance between "LT GRN/RED" wire
terminal of electric throttle body connector and engine
ground, between "LT GRN/BLK" wire terminal of electric
throttle body connector and engine ground.
Is resistance infinity?
4 Throttle actuator circuit check
1) Check throttle actuator referring to "Throttle Actuator
Performance Check" under "Electric Throttle Body
Assembly On-Vehicle Inspection in Section 1C".
Is check result satisfactory?
Action
"WHT"
"BLK"
"RED"
"GRN"
I4RS0B110022-02
Engine General Information and Diagnosis:
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Substitute a known-
good ECM and recheck.
1A-153
No
Go to "Engine and
Emission Control
System Check".
"LT GRN/RED" wire
and/or "LT GRN/BLK"
wire is shorted to power
circuit.
"LT GRN/RED" wire
and/or "LT GRN/BLK"
wire is shorted to
ground circuit.
Replace electric throttle
body