EN(H4SO 2.5)(diag)-61
ENGINE (DIAGNOSTICS)
Diagnostics for Engine Starting Failure
Step
Check
Yes
No
1
CHECK OPTION CODE.
Is the option code EC, EK, EH,
ER or K4?
Go to step 2.
Refer to EN(H4SO
2.0) section. <Ref.
to EN(H4SO
2.0)(diag)-64, List
of Diagnostic Trou-
ble Code (DTC).>
NOTE:
Fuel injection sys-
tem for KA and KS
model is the same
as 2.0 L model.
2
CHECK IGNITION SYSTEM FOR SPARKS.
1) Remove the plug cord cap from each spark
plug.
2) Install a new spark plug on plug cord cap.
CAUTION:
Do not remove the spark plug from engine.
3) Contact the spark plug thread portion on
engine.
4) While opening the throttle valve fully, crank
the engine to check that spark occurs at each
cylinder.
Does spark occur at each cyl-
inder?
Check the fuel
pump system.
<Ref. to EN(H4SO
2.5)(diag)-63,
FUEL PUMP CIR-
CUIT, Diagnostics
for Engine Start-
ing Failure.>
Go to step 3.
3
CHECK POWER SUPPLY CIRCUIT FOR IG-
NITION COIL AND IGNITOR ASSEMBY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ignition coil
and ignitor assembly.
3) Turn the ignition switch to ON.
4) Measure the power supply voltage between
ignition coil and ignitor assembly connector
and engine ground.
Connector & terminal
(E12) No. 2 (+) — Engine ground (
−
):
Is the voltage more than 10 V? Go to step 4.
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit of
harness between
ignition coil and
ignitor assembly,
and main relay
connector
• Poor contact in
coupling connector
• Blown out fuse
4
CHECK HARNESS OF IGNITION COIL AND
IGNITOR ASSEMBLY GROUND CIRCUIT.
1) Turn the ignition switch to OFF.
2) Measure the resistance between ignition
coil and ignitor assembly connector and engine
ground.
Connector & terminal
(E12) No. 3 — Engine ground:
Is the resistance less than 5
Ω?
Go to step 5.
Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit of
harness between
ignition coil and
ignitor assembly
connector and
engine grounding
terminal
5
CHECK IGNITION COIL AND IGNITOR AS-
SEMBLY.
1) Remove the spark plug cords.
2) Measure the resistance between spark
plug cord contact portions to check secondary
coil.
Terminals
No. 1 — No. 2:
No. 3 — No. 4:
Is the resistance 10 — 15 k
Ω? Go to step 6.
Replace the igni-
tion coil and ignitor
assembly. <Ref. to
IG(H4SO 2.0)-8,
Ignition Coil and
Ignitor Assembly.>