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If “TESTING” is not displayed after 5 minutes, retry from
step 2.
7) Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”.If“NG” is displayed, refer to “Diagnostic
Procedure”, EC-202.
AEC873A
Overall Function Check
NGEC0108
Use this procedure to check the overall function of the heated oxy-
gen sensor 1 (front) circuit. During this check, a 1st trip DTC might
not be confirmed.
Without CONSULT-II
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 50 [Heated oxy-
gen sensor 1 (front) signal] and engine ground.
3) Check the following with engine speed held at 2,000 rpm con-
stant under no load.
쐌 The maximum voltage is over 0.6V at least one time.
쐌 The minimum voltage is over 0.1V at least one time.
4) If NG, go to “Diagnostic Procedure”, EC-202.
Diagnostic Procedure
NGEC0109
1 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
1. Turn ignition switch OFF.
2. Loosen and retighten heated oxygen sensor 1 (front).
SEF332VA
Tightening torque:
40-60N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
䊳 GO TO 2.
DTC P0131 HEATED OXYGEN SENSOR 1 (FRONT)
(LEAN SHIFT MONITORING)
KA24DE
DTC Confirmation Procedure (Cont’d)
EC-202
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