Isuzu 2000 Trooper Workshop Manual page 1075

6E–206
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0153 – HO2S Slow Response Bank 2 Sensor 1 (Cont'd)
Step
14 1. Visually/physically inspect the following items:
D
Ensure that the Bank 2 HO2S 1 is securely
installed.
D
Check for corrosion on terminals.
D
Check terminal tension (at Bank 2 HO2S 1 and
at the PCM).
D
Check for damaged wiring.
Was a problem found in any of the above areas?
15 1. Disconnect Bank 2 HO2S 1.
2. Ignition "ON."
3. Using a DVM at the PCM side of the HO2S 1
connector, measure the voltage between the high
signal circuit and ground.
Are both voltages in the specified range?
16 1. With Bank 2 HO2S 1 disconnected, jumper the high
and low (PCM side) signal circuits to ground.
2. Ignition "ON."
3. Using a Tech 2, monitor the Bank 2 HO2S 1 voltage.
Does the Tech 2 indicate less than 10 mV and
immediately return to about 450 mV when the jumper is
removed?
17 Replace the affected heated oxygen sensors.
NOTE: Before replacing the sensors, the cause of the
contamination must be determined and corrected.
D
Fuel contamination.
D
Use of improper RV sealant.
D
Engine oil/coolant consumption.
Is the action complete?
18 Repair condition as necessary.
Is the action complete?
19 Check for faulty PCM connections or terminal damage.
Is the action complete?
20 Repair open, short or grounded signal circuit.
Is the action complete?
21 Replace Bank 2 HO2S 1.
Is the action complete?
22 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?
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
3-4 V
—
—
—
—
—
—
must be
for
—
Yes No
Go to Step 18 Go to Step 15
Go to Step 16 Go to Step 19
Go to Step 21 Go to Step 22
Verify repair —
Verify repair —
Go to Step 20
Verify repair
Verify repair —
Verify repair —
Verify repair —