Suzuki Jimny Service Manual page 427

6-70 ENGINE GENERAL INFORMATION AND DIAGNOSIS
Step
5 Check Fuel Injectors and Circuit.
1) Using sound scope (4) or such, check operating
sound of each injector (5) when engine is run-
ning. Cycle of operating sound should vary
according to engine speed. See Fig. 3.
If no sound or an unusual sound is heard, check
injector circuit (wire or coupler) or injector.
2) Turn ignition switch OFF and disconnect a fuel
injector connector.
3) Check for proper connection to fuel injector at
each terminal.
4) If OK, then check injector resistance.
See Fig. 4.
Injector resistance
11.3 – 13.8 ohm at 20 °C (68 °F)
5) Carry out steps 1) and 3) on each injector.
6) Check each injector for injected fuel volume
referring to Section 6E. See Fig. 5.
Injected fuel volume
43 – 47 cc/15 sec (1.45/1.51 – 1.58/1.65 US/
Imp.oz/15 sec)
7) Check each injector for fuel leakage after injec-
tor closed.
Fuel leakage
Less than 1 drop / min. (1)
Is check result in step 1) and 3) to 7) satisfactory?
6 Check EVAP Canister Purge Valve.
1) Disconnect purge hose (2) from EVAP canister.
2) Place finger against the end of disconnected
hose.
3) Check that vacuum is not felt there when
engine is cool and running at idle. See Fig. 6.
Is vacuum felt?
7 Check intake manifold absolute pressure sensor for
performance (See step 4) of DTC P0105 (No.11)
Diag. Flow Table).
Is it in good condition?
8 Check engine coolant temp. sensor for perfor-
mance (See Section 6E).
Is it in good condition?
9 Check intake air temp. sensor for performance
(See Section 6E).
Is it in good condition?
10 Check throttle position sensor for performance
(See step 5) of DTC P0121 Diag. Flow Table).
Is it in good condition?
11 Check PCV valve for valve clogging
(See Section 6E).
Is it good condition?
Action Yes
Go to Step 6.
Check EVAP control
system (See Section
6E).
Go to Step 8.
Go to Step 9.
Go to Step 10.
Go to Step 11.
Substitute a known-
good ECM and recheck.
No
Check injector circuit or
replace fuel injector(s).
Go to Step 7.
Repair or replace.
Replace engine coolant
temp. sensor.
Replace intake air temp.
sensor.
Replace throttle position
sensor.
Replace PCV valve.