(From page
11-84
)
Check for a short in the HO2S:
1. Turn the ignition switch OFF.
2. Disconnect the right primary
HO2S (Bank 1, Sensor 1) or
left primary HO2S* (Bank 2,
Sensor 1) connector.
3. Start the engine and let it idle.
4. Check the right primary HO2S
(Bank 1, Sensor 1) or left pri-
mary HO2S* (Bank 2, Sensor
1) output voltage with the
scan tool.
Does it stay at 0.5 V or less?
YES
Check for a short in the wires:
1. Turn the ignition switch OFF.
2. Disconnect the PCM connec-
tor D (22P).
3. Check for continuity between
No. 1 terminal on the harness
side of the HO2S connector
and body ground.
Replace the HO2S.
Is there continuity?
NO
Substitute a known-good PCM
and recheck (see page
11-42
for
immobilizer information). If symp-
tom/indication goes away, replace
the original PCM.
Repair short in the wire between
PCM (D19 or D18*) and right pri-
mary HO2S (Bank 1, Sensor 1) or
left primary HO2S* (Bank 2,
Sensor 1).
RIGHT PRIMARY HO2S (Bank 1, Sensor 1) CONNECTOR (C119)
or LEFT PRIMARY HO2S (Bank 1, Sensor 1) CONNECTOR (C126)
Wire side of female terminals
*: P0151
YES
NO
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