Suzuki 2006 SX4 Service Manual page 201

Troubleshooting
NOTE
Before using the following flow chart, chart 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 Fuel pump operating sound check
1) Remove fuel filler cap and then turn ON ignition switch.
Can you hear operating sound?
2 Fuel pressure check
1) Check fuel pressure referring to "Fuel Pressure
Inspection in Section 1G".
Is check result satisfactory?
3 Fuel pressure check
1) Start engine and warm it up to normal operating
temperature.
2) Keep engine speed at 4000 rpm.
Does fuel pressure show about the same value as Step 2?
4 Fuel line check
1) Check fuel pipe, fuel hose and joint for fuel leakage.
Are they in good condition?
5 Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition?
6 Was fuel pressure higher than specification in Step 2?
7 Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition?
8 Fuel line check
1) Check fuel pipe, fuel hose and joint for damage or
deform.
Are they in good condition?
Action
Engine General Information and Diagnosis:
Yes
Go to Step 2.
Go to Step 3.
Go to Step 4.
Go to Step 5.
Fuel system is in good
condition.
Go to Step 7.
Faulty fuel pressure
regulator.
Clogged fuel filter, faulty
fuel pump, faulty fuel
pressure regulator or
fuel leakage from hose
connection in fuel tank.
1A-157
No
Go to "Fuel Pump and
Its Circuit Check".
Go to Step 6.
Go to Step 8.
Repair or replace
defective part.
Repair or replace
damaged or damaged
part.
Go to Step 8.
Repair or replace
damaged or damaged
part.
Repair or replace
defective part.