Dtc P0123: Throttle / Pedal Position Sensor / Switch "A" (Main) Circuit High - Suzuki Swift Sport 2004 Service & Repair Manual

Step
6 Wire harness check
1) Measure voltage between "GRN" wire terminal of electric
throttle body connector and engine ground with ignition
switch turned ON.
Is voltage 4 – 6 V?
7 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "C37-
54" and "C37-42" terminals.
3) If OK, measure resistance between "GRN" and "BLK"
wire terminals of electric throttle body connector.
Is resistance infinity?
8 Wire harness check
1) Measure resistance between "GRN" wire terminal of
electric throttle body connector and engine ground with
ignition switch turned OFF.
Is resistance infinity?
9 Electric throttle body check
1) Check TP sensor referring to "Throttle Position Sensor
Performance Check" under "Electric Throttle Body
Assembly On-Vehicle Inspection in Section 1C".
Is output voltage within specified value?

DTC P0123: Throttle / Pedal Position Sensor / Switch "A" (Main) Circuit High

Wiring Diagram
Refer to "DTC P0122: Throttle / Pedal Position Sensor / Switch "A" (Main) Circuit Low".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Output voltage of TP sensor (main) is more than specified
value for specified time continuously.
(1 driving detection logic)
NOTE
When DTC P0123 and P0223 are indicated together, it is possible that "RED" wire shorted to power
circuit and/or "BLK" wire open.
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check DTC.
Action
Engine General Information and Diagnosis:
Yes
Go to Step 9.
Go to Step 8.
Substitute a known-
good ECM and recheck.
Substitute a known-
good ECM and recheck.
Trouble area
• TP sensor (main) circuit
• Electric throttle body assembly
• ECM
1A-85
No
Go to Step 7.
"GRN" wire is shorted to
"BLK" wire.
"GRN" wire is shorted to
ground circuit.
Replace electric throttle
body.
S7RS0B1104030