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SEC902C
Overall Function Check
NFEC1152
Use this procedure to check the overall function of the heated oxy-
gen sensor 1 circuit. During this check, a DTC might not be con-
firmed.
WITH GST
NFEC1152S01
1) Start engine and warm it up to normal operating temperature.
2) Set voltmeter probes between ECM terminal 91 (bank 1
HO2S1 signal) or 92 (bank 2 HO2S1 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-494.
Diagnostic Procedure
NFEC1153
1 RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
SEC047D
© GO TO 2.
2 RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten corresponding heated oxygen sensor 1.
Tightening torque:
40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)
© GO TO 3.
DTC P1143, P1163 HO2S1
Overall Function Check
EC-494
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