EN(H4DOTC)(diag)-320
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
LH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
tumble generator valve assembly LH.
3) Measure the resistance of harness between
ECM connector and tumble generator valve
assembly LH connector.
Connector & terminal
(B134) No. 23 — (E51) No. 5:
(B134) No. 24 — (E51) No. 4:
Is the resistance less than 1 Ω? Go to step
2.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
ECM
connector
and tumble gener-
ator valve assem-
bly LH connector
• Poor contact of
coupling connector
2
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
LH CONNECTOR.
Measure the resistance between ECM connec-
tor and chassis ground.
Connector & terminal
(B134) No. 23 — Chassis ground:
(B134) No. 24 — Chassis ground:
Is the resistance 1 MΩ or
more?
Go to step
3.
Repair the short
circuit to ground in
harness between
ECM connector
and tumble gener-
ator valve assem-
bly LH connector.
3
CHECK FOR POOR CONTACT.
Check for poor contact of tumble generator
valve assembly LH connector.
Is there poor contact of the tum-
ble generator valve assembly
LH connector?
Repair the poor
contact of tumble
generator valve
assembly LH con-
nector.
Replace the tum-
ble generator valve
assembly LH.
<Ref. to FU(STI)-
48, Tumble Gener-
ator Valve Assem-
bly.> <Ref. to
FU(w/o STI)-48,
Tumble Generator
Valve Assembly.>