Dtc P0190: Fuel Rail Pressure Sensor Circuit Malfunction - Suzuki GRAND VITARA 2005 Service Manual

DTC P0190: Fuel Rail Pressure Sensor Circuit Malfunction

NOTE
• Conditions for applying the fault finding procedure to stored faults:
The fault is declared present after repeated engine starts or with the engine running.
• Use service wire for all operations on the controller connectors.
• If the fault is present:
– The engine will stop immediately.
– It is impossible to restart.
– The Red stop warning light (gravity 2 warning light) is lit.
• Priorities when dealing with a number of faults:
As a priority, deal with fault "DTC P0697: Sensor Reference Voltage "C" Circuit / Open Malfunction: "
if the fault 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
CC.0
CO.1
1.DEF
Troubleshooting for CC.0: Short circuit to vehicle body ground
Check the fuel pressure sensor connectors.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "C84-2" wire of fuel pressure sensor connector and "C86-32" terminal of ECM connector
• Between "C84-3" wire of fuel pressure sensor connector and "C86-48" terminal of ECM connector
Repair if necessary.
If the fault is still present, replace the fuel pressure sensor with common rail referring to "Common Rail (High
Pressure Fuel Injection Rail) Removal and Installation: in Section 1G".
Troubleshooting for CO.1: Open circuit or short circuit to +12 V
Check the fuel pressure sensor connectors.
Check the ECM connections.
Repair if necessary.
Check for continuity and insulation from the +12 V feed on the following connections:
• Between "C84-2" wire of fuel pressure sensor connector and "C86-32" terminal of ECM connector
• Between "C84-1" wire of fuel pressure sensor connector and "C86-46" terminal of ECM connector
• Between "C84-3" wire of fuel pressure sensor connector and "C86-48" terminal of ECM connector
Repair if necessary.
If the fault is still present, replace the fuel pressure sensor with common rail referring to "Common Rail (High
Pressure Fuel Injection Rail) Removal and Installation: in Section 1G".
Engine General Information and Diagnosis:
Detecting condition
Short circuit to vehicle body ground
Open circuit or short circuit to +12 V
Offset at minimum threshold
1A-37
S5JB0B1104096