Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 111

6-106 ENGINE GENERAL INFORMATION AND DIAGNOSIS (G16/J20 ENGINES)
TROUBLESHOOTING
Step
1 Was "Engine Diag. Flow Table" performed?
2 Does fuel level meter in combination meter indi-
cate "E" (Empty)?
3 Check fuel level sensor and its circuit :
1) Check voltage between terminal E61-28 and
ground with ignition switch ON.
Is it about 7.1 V or more?
4 Is voltage in Step 3 "9 – 14 V"?
5 Check Fuel Level Sensor :
1) Turn ignition switch OFF and disconnect fuel
level sensor connector (L15 (floor harness) –
R01 (fuel tank harness)).
2) Check for proper connection to fuel level sen-
sor at L15-4 ("BLU/WHT") and L15-3 ("BLU/
YEL") terminals.
3) If OK, then check resistance between R01-4
("BLU/WHT") and R01-3 ("BLU/YEL") termi-
nals. (Refer to "Fuel Level Gauge (Sender
Gauge)" in Section 8C.)
Is value close to one of above values indicated?
Action Yes
Go to Step 2.
Replenish fuel tank with
fuel and go to Step 3.
Go to Step 4.
"BLU/WHT" wire shorted
to power circuit or fuel
level meter malfunction.
"BLU/WHT" or "BLK/YEL"
circuit open.
If wire and connection are
OK, substitute a known-
good ECM (PCM) and
recheck.
No
Go to "Engine Diag. Flow
Table" in this section.
Go to Step 3.
Intermittent trouble or
faulty ECM (PCM).
Check for intermittent
referring to "Intermittent
and Poor Connection" in
Section 0A.
Go to Step 5.
Check "BLU/WHT" and
"BLK/YEL" wires
between R01 and R02
(fuel tank harness) con-
nections.
If OK, replace fuel level
sensor.