Isuzu 2000 Trooper Workshop Manual page 1028

Step
1 Was the "On-Board Diagnostic (OBD) System Check"
performed?
2 1. Ignition "ON," engine "OFF."
2. Observe the "Eng Cool Temp" display on the Tech 2.
Is the "Eng Cool Temp" below the specified value?
3 1. Ignition "ON," engine "OFF."
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor "DTC" info for DTC P0117.
Does the Tech 2 indicate DTC P0117 failed this
ignition?
4 1. Disconnect the ECT sensor electrical connector.
2. Observe the "Eng Cool Temp" display on the Tech 2.
Is the "Eng Cool Temp" at the specified value?
5 1. Ignition "OFF."
2. Disconnect the PCM and check the ECT signal
circuit for a short to ground or a short to the sensor
ground circuit.
3. If the ECT signal circuit is shorted. repair it as
necessary.
Was the ECT signal circuit shorted to ground?
6 Replace the ECT sensor.
Is the action complete?
7 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
DTC P0117 – ECT Sensor Low Voltage
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
139°C
(282°F)
—
–39°C
(–38°F)
—
—
must be
for
—
6E–159
Yes No
Go to OBD
System
Check
Go to Step 2
Go to Step 4 Go to Step 3
Refer to
Diagnostic
Aids
Go to Step 4
Go to Step 6 Go to Step 5
Verify repair Go to Step 7
Verify repair —
Verify repair —