Dtc P0235: Turbo / Super Charger Boost Sensor "A" Circuit Malfunction - Suzuki GRAND VITARA 2005 Service Manual

1A-44 Engine General Information and Diagnosis:
Troubleshooting for 2.DEF: Accelerator pedal position (APP) sensor locked
Check the mechanical status of the accelerator pedal:
• Locked in full load position.
• Pedal blocked by an external component.
Repair if necessary.
Vary the position of the pedal and display the parameter "Pedal position" on Data List of SUZUKI scan tool.
If the values displayed are inconsistent, replace the accelerator pedal position (APP) sensor assembly.

DTC P0235: Turbo / Super Charger Boost Sensor "A" Circuit Malfunction

CAUTION
!
This fault can result in a rapid and significant fouling of the diesel particulate filter.
NOTE
• Conditions for applying the fault finding procedure to stored faults:
The fault is declared present:
– When an attempt is made to start the engine
– With the engine running
• Use service wire for all operations on the ECM connectors.
• If the fault is present:
– The EGR function is inhibited.
– The turbocharging pressure value changes to safe mode: "Turbo Pressure" on Data List of
SUZUKI scan tool = 1000 hPa.
– The Injection warning light (gravity 1 warning light) is lit.
• Order of priority in the event of more than one fault:
Deal with fault "DTC P0641: Sensor Reference Voltage "A" 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
Check the boost pressure sensor connections.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "C76-3" wire of boost pressure sensor connector and "C86-42" terminal of ECM connector
• Between "C76-74" wire of boost pressure sensor connector and "C86-19" terminal of ECM connector
Repair if necessary.
If the fault is still present, replace the boost pressure sensor.
Detecting condition
Open circuit or short circuit to vehicle body ground
Short circuit to +12 V
Inconsistency of signal
S5JB0B1104102