Dtc P2128: Pedal Position Sensor (Sub) Circuit High Input - Suzuki Grand Vitara Service Manual

Step
6 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between "E23-53" terminal of ECM
connector and engine ground.
Is resistance infinity?
7 Wire harness check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Check for proper connection of ECM connector at "E23-
54", "E23-52" and "E23-51" terminals.
3) If OK, measure resistance between "BLU/GRN" wire
terminal of accelerator pedal position (APP) sensor
assembly connector and vehicle body ground.
Is resistance infinity?
8 Wire harness check
1) Measure resistance between "E23-52" and each "E23-
54", "E23-51" terminals of ECM connector with ignition
switch turned OFF.
Is each resistance infinity?
9 Wire harness check
1) Measure resistance between "BLU/GRN" wire terminal
of accelerator pedal position (APP) sensor assembly
connector and "E23-52" terminal of ECM connector with
ignition switch turned OFF.
Is resistance below 3
10 Accelerator pedal position (APP) sensor assembly
check
1) Check accelerator pedal position sensor (sub) referring
to "Accelerator Pedal Position (APP) Sensor Assembly
Inspection: in Section 1C".
Is output voltage within specified value?

DTC P2128: Pedal Position Sensor (Sub) Circuit High Input

Wiring Diagram
Refer to "DTC P2122: Pedal Position Sensor (Main) Circuit Low Input: ".
DTC Detecting Condition and Trouble Area
DTC detecting condition
Output voltage of accelerator pedal position sensor (sub)
is more than specified value for 0.5 seconds continuously.
(1 driving detection logic)
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Action
Ω
?
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Engine General Information and Diagnosis:
Yes
Substitute a known-
good ECM and recheck.
Go to Step 8.
Go to Step 9.
Go to Step 10.
Substitute a known-
good ECM and recheck.
Trouble area
• Accelerator pedal position (APP) sensor (sub) circuit
• Accelerator pedal position (APP) sensor assembly
• ECM
• Incorrect mounting of accelerator (APP) sensor
assembly
1A-202
No
"ORN/BLU" wire is
shorted to ground
circuit.
"BLU/GRN" wire is
shorted to ground
circuit.
"BLU/GRN" wire is
shorted to "ORN" wire
and/or "BLU/YEL" wire
circuit.
"BLU/GRN" wire is open
or high resistance
circuit.
Replace accelerator
pedal position (APP)
sensor assembly.
S5JB0A1104085