Suzuki Grand Vitara XL-7 Service Manual page 163

6-1-24 ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM)
TROUBLESHOOTING
STEP
1 Was "ENGINE DIAG. FLOW TABLE" performed?
2 Check Fuel Injector Circuit For Short
1) With ignition switch OFF, disconnect ECM
connector.
2) Check for proper connection to ECM at E229-2,
E229-9, E229-25, E229-17, E229-26, E229-18,
E229-1 and E229-10 terminals.
3) If OK, disconnect connector at all fuel injectors.
4) Check for resistance between injector connector
terminals.
Is resistance between terminals of all fuel injectors
infinity (∞)?
3 Check Fuel Injector Circuit For Open
1) Connect connector to all fuel injectors.
2) Check for resistance between following terminals
of ECM connector.
E229-2 and E229-9: 0.56 Ω (maximum)
E229-25 and E229-17: 0.56 Ω (maximum)
E229-26 and E229-18: 0.56 Ω (maximum)
E229-1 and E229-10: 0.56 Ω (maximum)
Is check result as specified?
ACTION YES
Go to Step 2.
Go to Step 3.
Substitute a known-
good ECM and
recheck.
NO
Go to "ENGINE DIAG.
FLOW TABLE".
Short circuit between
"PNK" wire and "RED"
wire, "PNK/BLK" wire
and "RED/BLK" wire,
"PNK/GRN" wire and
"RED/GRN" wire, or
"PNK/BLU" wire and
"RED/BLU" wire.
Open "PNK" wire,
"RED" wire,
"PNK/BLK" wire,
"RED/BLK" wire,
"PNK/GRN" wire,
"RED/GRN" wire,
"PNK/BLU" wire or
"RED/BLU" wire.
If wire is OK, substitute
a known-good fuel
injector and recheck.