Engine General Information and Diagnosis: 1A-200
DTC P2127: Pedal Position Sensor (Sub) Circuit Low Input
S5JB0A1104084
Wiring Diagram
Refer to “DTC P2122: Pedal Position Sensor (Main) Circuit Low Input: ”.
DTC Detecting Condition and Trouble Area
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.
9 Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Check for proper connection of ECM connector at “E23-
54” terminal.
3) If OK, measure resistance between “E23-54” terminal of
ECM connector and engine ground.
Is resistance below 3
Ω
?
“ORN” wire is open or
high resistance circuit.
Faulty ECM ground
circuit. If circuit is OK,
substitute a known-
good ECM and recheck.
10 Accelerator pedal position (APP) sensor assembly
check
1) Check accelerator pedal position sensor (main) referring
to “Accelerator Pedal Position (APP) Sensor Assembly
Inspection: in Section 1C”.
Is output voltage within specified value?
Substitute a known-
good ECM and recheck.
Replace accelerator
pedal position (APP)
sensor assembly.
Step Action Yes No
DTC detecting condition Trouble area
Output voltage of accelerator pedal position sensor (sub)
is less than specified value for 0.5 seconds continuously.
(1 driving detection logic)
• Accelerator pedal position (APP) sensor (sub) circuit
• Accelerator pedal position (APP) sensor assembly
•ECM
• Incorrect mounting of accelerator pedal (APP) sensor
assembly
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