EN(H4SO)(diag)-275
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CY:DTC P2096 POST CATALYST FUEL TRIM SYSTEM TOO LEAN (BANK 1)
Refer to DTC P2097 for diagnostic procedure. <Ref. to EN(H4SO)(diag)-276, DTC P2097 POST CATALYST
FUEL TRIM SYSTEM TOO RICH (BANK 1), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
33
CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL MO-
TOR.
1) Connect the connector to ECM.
2) Turn the ignition switch to ON.
3) Measure the voltage between electronic
throttle control connector and engine ground.
Connector & terminal
(E57) No. 2 (+) — Engine ground (–):
(E57) No. 1 (+) — Engine ground (–):
Is the voltage 5 V or more?
Repair the short
circuit to power in
harness between
ECM and elec-
tronic throttle con-
trol connector.
Go to step
34
.
34
CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL MO-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance between electronic
throttle control connector and engine ground.
Connector & terminal
(E57) No. 2 — Engine ground:
(E57) No. 1 — Engine ground:
Is the resistance 1 M
:
or
more?
Go to step
35
.
Repair the short
circuit to ground in
harness between
ECM and elec-
tronic throttle con-
trol connector.
35
CHECK ELECTRONIC THROTTLE CON-
TROL MOTOR HARNESS.
Measure the resistance between electronic
throttle control connectors.
Connector & terminal
(E57) No. 2 — (E57) No. 1:
Is the resistance 1 M
:
or
more?
Go to step
36
.
Repair the short
circuit of harness
between ECM and
electronic throttle
control connector.
36
CHECK ELECTRONIC THROTTLE CON-
TROL GROUND CIRCUIT.
Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B134) No. 5 — Chassis ground:
(B137) No. 1 — Chassis ground:
(B137) No. 2 — Chassis ground:
(B137) No. 3 — Chassis ground:
(B137) No. 7 — Chassis ground:
Is the resistance less than 5
:
? Go to step
37
.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and engine
ground
• Poor contact of
coupling connector
37
CHECK ELECTRONIC THROTTLE CON-
TROL.
Measure the resistance between electronic
throttle control terminals.
Terminals
No. 2 — No. 1:
Is the resistance 50
:
or less? Go to step
38
.
Replace the elec-
tronic throttle con-
trol. <Ref. to
FU(H4SO)-14,
Throttle Body.>
38
CHECK ELECTRONIC THROTTLE CON-
TROL.
Move the throttle valve to the fully open and fully
closed positions with fingers.
Check that the valve returns to the specified
position when releasing fingers.
Does the valve return to the
specified position?Standard
value: 3 mm (0.12 in) from fully
closed position
Repair the poor
contact of ECM
connector.
Replace the elec-
tronic throttle con-
trol. <Ref. to
FU(H4SO)-14,
Throttle Body.>
Step
Check
Yes
No
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