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SEF308XB
Overall Function Check
NHEC0099
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.
WITH GST
NHEC0099S01
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 63 [HO2S1 (B1)
signal] or 62 [HO2S1 (B2) signal] and engine ground.
3) Check one of the following with engine speed held at 2,000
rpm constant under no load.
I The maximum voltage is over 0.6V at least one time.
I The minimum voltage is over 0.1V at least one time.
4) If NG, go to “Diagnostic Procedure”, EC-204.
Diagnostic Procedure
NHEC0100
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
SEF255X
© GO TO 2.
2 RETIGHTEN HEATED OXYGEN SENSOR 1 (FRONT)
Loosen and retighten corresponding heated oxygen sensor 1 (front).
Tightening torque:
40 - 60 N·m (4.1 - 6.2 kg-m, 30 - 44 ft-lb)
© GO TO 3.
DTC P0131 (BANK 1), P0151 (BANK 2) HO2S1 (FRONT) (LEAN SHIFT
MONITORING)
Overall Function Check
EC-204
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