Suzuki Grand Vitara XL-7 Service Manual page 138

6-78 ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM)
TABLE B-2 FUEL PRESSURE INSPECTION
SYSTEM DIAGRAM
INSPECTION
NOTE:
Before using following flow table, check to make sure that battery voltage is higher than 11 V. If battery
voltage is low, pressure becomes lower than specification even if fuel pump and line are in good condition.
STEP
1 1) Install fuel pressure gauge, referring to
"Low Pressure Fuel Supply System
Inspection" in Section 6E3.
2) Operate fuel pump.
Is fuel pressure then about 220 kPa
2
(2.2 kg/cm , 31.3 psi)?
2 Was fuel pressure higher than spec. in Step 1?
3 Was no fuel pressure applied in Step 1?
5
(C)
ACTION YES
Normal fuel pressure.
Clogged fuel heater, fuel
filter fuel temperature or
fuel hose/pipe.
D Shortage of fuel or
D Fuel pump and its
circuit defective.
(Refer to Table B-1
"Fuel Pump Circuit
Inspection".)
(A): Gauge
(B): Hose
(C): Attachment
1. Fuel tank
2. Fuel pump
3. Fuel filter
4. Fuel temperature sensor
5. Fuel heater
NO
Go to Step 2.
Go to Step 3.
Fuel leakage from fuel
line.