Isuzu 1999 RODEO Workshop Manual page 794

DTC P0140 – O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)
Step
7 1. Reconnect the PCM harness.
2. Ignition ON.
3. With the Bank 1 HO2S 2 sensor harness
disconnected, use a Digital Voltmeter (DVM) to
measure the voltage between the HO2S heater
ground wire and each signal circuit wire.
Does each signal circuit measure in the specified
range?
8 Check for a short to ground or voltage in both signal
circuits.
Was a problem found?
9 1. Jumper the high and low signal wires to the heater
ground wire.
2. Ignition ON.
Using a Tech 2, is the Bank 1 HO2S 2 voltage in the
specified range?
10 Replace Bank 1 HO2S 2.
Is the action complete?
11 Replace the PCM.
IMPORTANT: The
programmed. Refer to On–Vehicle Service in
Powertrain Control
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
(Cont'd)
Action
replacement PCM must
Module and Sensors
Value(s)
3–4 V Go to Step 9
— Verify repair
Go to Step 10
0–10 mV
— Verify repair
be
for
— Verify repair
6E1–167
Yes No
Go to Step 8
Go to Step 11
Go to Step 11
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