EN(H4SO)-192
ENGINE (DIAGNOSTICS)
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
5
CHECK OUTPUT SIGNAL FROM ECM.
1) Turn ignition switch to OFF.
2) Connect connectors to ECM and EGR sole-
noid valve.
3) Turn ignition switch to ON.
4) Measure voltage between ECM and chas-
sis ground.
Connector & terminal
(B134) No. 15 — Chassis ground:
(B134) No. 16 — Chassis ground:
(B134) No. 17 — Chassis ground:
(B134) No. 18 — Chassis ground:
Does the measured value change within
specified range?
0 — 10 V
Repair poor con-
tact in ECM con-
nector.
Go to step 6.
6
CHECK HARNESS BETWEEN EGR SOLE-
NOID VALVE AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from EGR solenoid
valve and ECM.
3) Measure resistance of harness between
EGR solenoid valve and ECM connector.
Connector & terminal
(B134) No. 18 — (E18) No. 6:
(B134) No. 17 — (E18) No. 1:
(B134) No. 16 — (E18) No. 4:
(B134) No. 15 — (E18) No. 3:
Is the measured value less than the speci-
fied value?
1
Ω
Go to step 7.
Repair open circuit
in harness
between ECM and
EGR solenoid
valve connector.
7
CHECK HARNESS BETWEEN EGR SOLE-
NOID VALVE AND ECM CONNECTOR.
Measure resistance of harness between EGR
solenoid valve and chassis ground.
Connector & terminal
(B134) No. 18 — Chassis ground:
(B134) No. 17 — Chassis ground:
(B134) No. 16 — Chassis ground:
(B134) No. 15 — Chassis ground:
Does the measured value exceed the specified
value?
1 M
Ω
Go to step 8.
Repair short circuit
in harness
between main
relay and EGR
solenoid valve
connector.
8
CHECK POOR CONTACT.
Check poor contact in ECM and EGR solenoid
valve connector.
Is there poor contact in ECM and EGR sole-
noid valve connector?
There is poor contact.
Repair poor con-
tact in ECM and
EGR solenoid
valve connector.
Even if MI lights
up, the circuit has
returned to a nor-
mal condition at
this time.
Step
Value
Yes
No