EN(H4SO 2.5)(diag)-165
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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 OUTPUT SIGNAL FROM ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B134) No. 14 (+) — Chassis ground (
−
):
Is the voltage more than 10 V? Even if the mal-
function indicator
light illuminates,
the circuit has
returned to a nor-
mal condition at
this time.
Go to step 3.
3
CHECK HARNESS BETWEEN PURGE CON-
TROL SOLENOID VALVE AND ECM CON-
NECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from purge con-
trol solenoid valve and ECM.
3) Measure the resistance of harness
between purge control solenoid valve connec-
tor and engine ground.
Connector & terminal
(E4) No. 2 — Engine ground:
Is the resistance more than 1
M
Ω?
Go to step 4.
Repair the ground
short circuit of har-
ness between
ECM and purge
control solenoid
valve connector.
4
CHECK HARNESS BETWEEN PURGE CON-
TROL SOLENOID VALVE AND ECM CON-
NECTOR.
Measure the resistance of harness between
ECM and purge control solenoid valve.
Connector & terminal
(B134) No. 14 — (E4) No. 2:
Is the resistance less than 1
Ω?
Go to step 5.
Repair the open
circuit of harness
between ECM and
purge control sole-
noid valve connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit of
harness between
ECM and purge
control solenoid
valve connector
• Poor contact in
coupling connector
5
CHECK PURGE CONTROL SOLENOID
VALVE.
1) Remove the purge control solenoid valve.
2) Measure the resistance between purge
control solenoid valve terminals.
Terminals
No. 1 — No. 2:
Is the resistance 10 — 100
Ω? Go to step 6.
Replace the purge
control solenoid
valve. <Ref. to
EC(H4SO 2.0)-7,
Purge Control
Solenoid Valve.>
6
CHECK POWER SUPPLY TO PURGE CON-
TROL SOLENOID VALVE.
1) Turn the ignition switch to ON.
2) Measure the voltage between purge control
solenoid valve and engine ground.
Connector & terminal
(E4) No. 1 (+) — Engine ground (
−
):
Is the voltage more than 10 V? Go to step 7.
Repair the open
circuit of harness
between main
relay and purge
control solenoid
valve connector.