Dtc P2120: Throttle/Pedal Position Sensor/Switch "D" Circuit Malfunction - Suzuki GRAND VITARA 2005 Service Manual

1A-86 Engine General Information and Diagnosis:

DTC P2120: Throttle/Pedal Position Sensor/Switch "D" Circuit Malfunction

CAUTION
!
• This fault may appear if the wiring harness has been damaged.
Follow the procedure described in "Electrical Circuit Inspection Procedure: in Section 00 in related
manual".
• This check enables the condition and the conformity of the engine wiring harness to be checked.
NOTE
• Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after a series of full load/no load actions on the accelerator pedal.
• Turbocharging, passenger compartment heating resistor activation and cruise control/ speed limiter
are not authorised.
• If the fault is present, the Injection warning light (gravity 1 warning light) is lit.
• The engine speed is fixed at 1400 rpm if there is a fault on "main" and "sub" wire of the accelerator
pedal position (APP) sensor and the engine torque is limited.
• Use service wire for all operations on the controller connectors.
• Priorities when dealing with a number of faults:
Apply the procedure for dealing with fault "DTC P0651: Sensor Reference Voltage "B" Circuit / Open
Malfunction: " first if it is present or stored.
Wiring Diagram
For wiring circuit and connector number, refer to "A-5 Engine and A/C Control System Circuit Diagram (DSL): in
Section 9A".
Detecting Condition
Displaying on SUZUKI scan tool
CO.0
CC.1
1.DEF
Troubleshooting for CO.0: Open circuit or short circuit to vehicle body ground
NOTE
Priorities when dealing with a number of faults:
If fault "DTC P0225: Accelerator Pedal Position (APP) Sensor Assembly / Switch "C" Circuit
Malfunction: " is present at the same time, check that the sensor is connected correctly.
Check the connections of the accelerator pedal position (APP) sensor.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "E68-6" wire of accelerator pedal position (APP) sensor connector and "E66-21" terminal of ECM
connector
• Between "E68-1" wire of accelerator pedal position (APP) sensor connector and "E66-15" terminal of ECM
connector
Repair if necessary.
Measure the resistance on the accelerator pedal position (APP) sensor (sub) on accelerator pedal position
(APP) sensor assembly between "E68-1" and "E68-5" terminals.
Replace the accelerator pedal position (APP) sensor assembly if the resistance is not 0.8 – 4.9 kΩ.
Detecting condition
Open circuit or short circuit to vehicle body ground
Short circuit to +12 V
Inconsistency of signal
S5JB0B1104137