Dtc P0089: Fuel Pressure Regulator 1 Performance Malfunction - Suzuki GRAND VITARA 2005 Service Manual
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Also See for GRAND VITARA 2005:
- Owner's manual (1736 pages) ,
- Service manual (801 pages) ,
- Manual (35 pages)
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1A-28 Engine General Information and Diagnosis:
Troubleshooting for 1.DEF: Internal electronic fault
Check the boost pressure control solenoid valve connections.
Check the ECM connections.
Repair if necessary.
Measure the resistance of the boost pressure control solenoid valve between its "C90-1" and "C90-2" terminals:
If the resistance displayed is not 14.7 – 16.1 Ω at 20 °C, 68 °F, replace the boost pressure control solenoid valve.
Check the continuity and insulation from vehicle body ground of the following connections:
• Between "C90-1" wire of boost pressure control solenoid valve connector and "C85-23" terminal of ECM
connector
• Between "C90-2" wire of boost pressure control solenoid valve connector and "E33-6" wire of main relay
mounting connector
If the fault is still present, check that the ECM output stage is working correctly.With the boost pressure control
solenoid valve connected:
• Or using a voltmeter:
– Connect the negative terminal of the voltmeter to "C90-1" wire of the solenoid valve connector and the
positive terminal to "C90-2" wire.
– Clear any solenoid valve faults and perform output test "Boost pressure valve" on SUZUKI scan tool.
The voltmeter should display five cycles of two successive voltages: ~ 2.5 V (opening cyclic ratio of 20%)
then ~ 8.75 V (opening cyclic ratio of 70%).
• Or using an oscilloscope (at 5 V range/division and 1 ms/div time base):
– Connect the negative terminal of the oscilloscope to "C90-1" wire of the solenoid valve connector and the
positive terminal to "C90-2" wire of the solenoid valve connector.
– Clear any solenoid valve faults and perform output test "Boost pressure valve" on SUZUKI scan tool.
The oscilloscope should display a square wave signal with an amplitude of 12.5 V (equal to the battery
voltage) at a frequency of 140 Hz (with an opening cyclic ratio increasing successively from ~ 20 to ~ 70%).
– If the measurement is correct, replace the solenoid valve.
– If the measurement does not show any control or continuous voltage, substitute a known-good ECM and
recheck.
DTC P0089: Fuel Pressure Regulator 1 Performance Malfunction
NOTE
• Conditions for applying fault finding procedures to stored faults:
The fault is declared present after:
– Engine start.
– A road test.
– Output test "IMV/Flow actuator" on SUZUKI scan tool.
• If the fault is present:
– It is not possible to start the engine.
– Engine stops if already started,
– If 3.DEF is present, the Injection warning light (gravity 1 warning light) is lit.
– If one of the other faults is present, the Red stop warning light (gravity 2 warning light) is lit.
• Use service wire for all operations on the ECM connectors.
Wiring Diagram
For wiring circuit and connector number, refer to "A-5 Engine and A/C Control System Circuit Diagram (DSL): in
Section 9A".
S5JB0B1104091
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