EN(H4DOTC)(diag)-311
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
DM:DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN (BANK 1)
Refer to DTC P2097 for diagnostic procedure. <Ref. to EN(H4DOTC)(diag)-312, DTC P2097 POST CATA-
LYST FUEL TRIM SYSTEM TOO RICH (BANK 1), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
Step
Check
Yes
No
1
CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE CON-
NECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
oil flow control solenoid valve.
3) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B137) No. 15 (+) — Chassis ground (–):
(B137) No. 14 (+) — Chassis ground (–):
Is the voltage less than 1 V?
Go to step
2
.
Repair the short
circuit to power in
harness between
ECM and oil flow
control solenoid
valve connector.
2
CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE CON-
NECTOR.
Measure the resistance of harness between
ECM and oil flow control solenoid valve connec-
tor.
Connector & terminal
(B137) No. 15 — (E37) No. 1:
(B137) No. 14 — (E37) No. 2:
Is the resistance less than 1
:
? Go to step
3
.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and oil flow
control solenoid
valve connector
• Poor contact of
coupling connector
3
CHECK OIL FLOW CONTROL SOLENOID
VALVE.
Measure the resistance between oil flow control
solenoid valve terminals.
Terminals
No. 1 — No. 2:
Is the resistance 6 — 12
:
?
Repair the poor
contact of ECM
and oil flow control
solenoid valve con-
nector.
Replace the oil
flow control sole-
noid valve. <Ref. to
ME(H4DOTC)-61,
Camshaft.>
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