Suzuki 2006 SX4, Service Manual

Page: 163 / 1478

Engine General Information and Diagnosis: 1A-119
DTC P2127 / P2128: Throttle / Pedal Position Sensor / Switch “E” Circuit Low / High Input
S6RW0C1104071
Wiring Diagram
Refer to “DTC P2122 / P2123: Throttle / Pedal Position Sensor / Switch “D” Circuit Low / High”.
DTC Detecting Condition and Trouble Area
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?
Go to Step 5. Repair or replace APP
sensor (main) power
supply, signal and/or
ground circuit(s).
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?
Go to Step 6. Substitute a known-
good ECM and recheck.
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?
Substitute a known-
good ECM and recheck. Replace APP sensor
assembly.
Step Action Yes No
DTC detecting condition Trouble area
DTC P2127:
Output voltage of APP sensor (sub) is lower than 0.23 V for 0.5
sec.
(1 driving cycle detection logic)
• APP sensor (sub) and/or its circuit
• ECM
DTC P2128:
Output voltage of APP sensor (sub) is higher than 2.4 V for 0.5
sec.
(1 driving cycle detection logic)