ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM)
6-45
TROUBLESHOOTING
STEP
ACTION
YES
NO
1
Was “ENGINE DIAG. FLOW TABLE” performed?
Go to Step 2.
Go to “ENGINE DIAG.
FLOW TABLE”.
2
Check Fuel Injector Circuit For Short
1) With ignition switch OFF, disconnect ECM
connector.
2) Check for proper connection to ECM at C51-2,
C51-30, C51-5, C51-6, C51-3, C51-31, C51-4
and C51-32 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 (
∞
)?
Go to Step 3.
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.
3
Check Fuel Injector Circuit For Open
1) Connect connector to all fuel injectors.
2) Check for resistance between following terminals
of ECM connector.
C51-2 and C51-30: 0.56
Ω
(maximum)
C51-5 and C51-6: 0.56
Ω
(maximum)
C51-3 and C51-31: 0.56
Ω
(maximum)
C51-4 and C51-32: 0.56
Ω
(maximum)
Is check result as specified?
Substitute a known-
good ECM and
recheck.
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.
