Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 280

TROUBLESHOOTING
Step
1 Fuel Pump Operation check :
1) Remove fuel filler cap.
2) Turn On ignition switch.
Is fuel pump operation sound heard for 3 sec.
after ignition switch ON?
2 Fuel Pump Circuit check :
1) With ignition switch OFF, remove fuel pump
relay (4) from connector (5).
2) Using service wire (1), connect "PNK/BLK"
wire terminal (2) and "BLU/BLK" wire termi-
nal (3) of relay connector.
Is fuel pump operation sound heard with ignition
switch ON?
3 Fuel Pump Relay check :
Check fuel pump relay referring to "Fuel Pump
Relay" in Section 6E2.
Is it in good condition?
Fig. for Step 2
[A] : Left hand steering vehicle
[B] : Right hand steering vehicle
ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE) 6-1-139
Action
[A]
4
3
2
5
Yes
Fuel pump circuit is in
good condition.
Go to Step 3.
"BLK/WHT", "WHT/GRN"
wire open.
[B]
4
1 3
2
5
1
No
Go to Step 2.
"BLU/BLK", "PNK/BLK"
wire open.
"BLK" wire open, poor
ground point connection.
Fuel pump malfunction.
Faulty fuel pump relay.