Dtc P0243: Boost Pressure Malfunction - Suzuki Grand Vitara 2011 Manual

Troubleshooting for D1: Inconsistency of signal
In the event of a number of faults with "DTC P0105: Barometric Pressure Circuit: For Diesel Engine Model",
display parameter "Turbo Pressure" on Data List of SUZUKI scan tool.
If this value is locked at 1000 hPa and "Barometric Pres" on Data List of SUZUKI scan tool is displaying a
different value, replace the boost pressure sensor.
Check the boost pressure sensor connections.
Check the ECM connections.
Repair if necessary.
Check the following connections for continuity and make sure there is no interference resistance:
• Between "C76-3" wire of boost pressure sensor connector and "C86-42" terminal of ECM connector
• Between "C76-1" wire of boost pressure sensor connector and "C86-45" terminal of ECM connector
• Between "C76-4" 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.

DTC P0243: Boost Pressure Malfunction

CAUTION
!
This fault can result in a rapid and significant fouling of the diesel particulate filter.
NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after the engine is started or following a road test.
• If the fault is present:
– Turbocharging is no longer authorised.
– The EGR function is inhibited.
– The Injection warning light (gravity 1 warning light) is lit.
• Use service wire for all operations on the ECM connectors.
• Order of priority in the event of more than one fault:
– Firstly, deal with fault "DTC P1431: Clogged Diesel Particulate Filter Failures: For Diesel Engine
Model" if it is present or stored.
Detecting Condition
Displaying on SUZUKI scan tool
D1
D2
Troubleshooting for D1: Pressure too low
Check the boost pressure sensor connections.
Check the connections of the boost pressure control solenoid valve.
Check the ECM connections.
Repair if necessary.
Check the sealing of the high pressure air circuit:
• Disconnected or pierced pipes.
• Pressure sensor disconnected or poorly fitted (seal present).
• Intercooler pierced (to check the intercooler: with the vehicle stationary, stabiles the engine speed between
3500 to 4000 rpm and check there are no leaks).
Check the conformity of the turbocharging pressure signal and perform Test 5 and 6 of Fault Finding-Tests
referring to "Test 5: Variable geometry turbocharger control: For Diesel Engine Model" and "Test 6: Rotating part
of a turbocharger: For Diesel Engine Model".
Engine General Information and Diagnosis: For Diesel Engine Model 1A-310
Pressure too low
Pressure too high
Detecting condition
S6JB0A1124103