Dtc P2127 / P2128: Throttle / Pedal Position Sensor / Switch "E" Circuit Low / High Input . 1A-119 - Suzuki 2006 SX4 Service Manual

Step
4 Wire harness check
1) Turn ignition switch OFF position.
2) Disconnect connectors from APP sensor and ECM.
3) Check for proper terminal connection to APP sensor and
ECM connectors.
4) If connections are OK, check that APP sensor (main)
circuit is as follows.
• Wiring harness resistance of each APP sensor (main)
power supply, signal and ground circuit is less than 3
Ω
• Insulation resistance of each APP sensor (main)
power supply and signal circuit is infinity between
APP sensor connector and vehicle body ground.
• Insulation resistance of wire harness is infinity
between APP sensor (main) power supply terminal
and each other terminal at APP sensor connector.
• Circuit voltage of each APP sensor (main) power
supply, signal and ground circuit is 0 – 1 V with
ignition switch turned ON
Are they in good condition?
5 APP sensor power supply voltage check
1) Connect connectors to ECM.
2) Turn ignition switch ON position.
3) Check that circuit voltage is 5 V between APP sensor
(main) power supply terminal and vehicle body ground.
Is it in good condition?
6 APP sensor check
1) Check APP sensor for performance referring to
"Accelerator Pedal Position (APP) Sensor Assembly
Inspection in Section 1C".
Is it in good condition?
DTC P2127 / P2128: Throttle / Pedal Position Sensor / Switch "E" Circuit Low / High Input
Wiring Diagram
Refer to "DTC P2122 / P2123: Throttle / Pedal Position Sensor / Switch "D" Circuit Low / High".
DTC Detecting Condition and Trouble Area
DTC detecting condition
DTC P2127:
Output voltage of APP sensor (sub) is lower than 0.23 V for 0.5
sec.
(1 driving cycle detection logic)
DTC P2128:
Output voltage of APP sensor (sub) is higher than 2.4 V for 0.5
sec.
(1 driving cycle detection logic)
Action
Engine General Information and Diagnosis:
Yes
Go to Step 5.
Go to Step 6.
Substitute a known-
good ECM and recheck.
Trouble area
• APP sensor (sub) and/or its circuit
• ECM
1A-119
No
Repair or replace APP
sensor (main) power
supply, signal and/or
ground circuit(s).
Substitute a known-
good ECM and recheck.
Replace APP sensor
assembly.
S6RW0C1104071