Isuzu 2000 Trooper Workshop Manual page 1078

DTC P0154 –HO2S Circuit Insufficient Activity Bank 2 Sensor 1 (Cont'd)
Step
7 1. Ignition "OFF."
2. With the PCM disconnected, check continuity of the
Bank 2 HO2S 1 high circuit.
3. If the Bank 2 HO2S 1 high circuit measures over 5.0
ohms, repair open or poor connection as necessary.
Was a Bank 2 HO2S 1 high circuit problem found and
corrected?
8 1. Ignition "OFF."
2. With the PCM disconnected, check continuity of the
Bank 2 HO2S 1 low circuit.
3. If the Bank 2 HO2S 1 low circuit measures over 5.0
ohms, repair open or poor connection as necessary.
Was a Bank 2 HO2S 1 low circuit problem found and
corrected?
9 1. Ignition "ON," engine "OFF."
2. Disconnect Bank 2 HO2S 1 and jumper the HO2S
high and low circuits (PCM side) to ground.
3. Using a Tech 2, monitor Bank 2 HO2S 1 voltage.
Is the Bank 2 HO2S 1 voltage in the specified range?
10 Replace Bank 2 HO2S 1.
Is the action complete?
11 Replace the PCM.
IMPORTANT: The
programmed.
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?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
—
0-10 mV
—
must be
for
—
6E–209
Yes No
Go to Step 8
Verify repair
Verify repair Go to Step 9
Go to Step 10 Go to Step 11
Verify repair —
Verify repair —