Isuzu 2000 Trooper Workshop Manual page 1022

DTC P0112–IAT Sensor Circuit Low Voltage
Step
1 Was the "On-Board Diagnostic (OBD) System Check"
performed?
2 1. Ignition "ON," engine "OFF."
2. Using a Tech 2, monitor the intake air temperature
(IAT).
Is the intake air temperature greater than the specified
value?
3 1. Ignition "ON," engine "OFF." Review and record
Tech 2 Failure Records data.
2. Operate the vehicle within Failure Records
conditions as noted.
3. Using a Tech 2, monitor the "DTC" info for DTC
P0112.
Does the Tech 2 indicate DTC P0112 failed this
ignition?
4 1. Ignition "OFF."
2. Disconnect the IAT sensor electrical connector.
3. Ignition "ON."
4. Observe the intake air temperature on the Tech 2.
Is the intake air temperature below the specified value?
5 1. Ignition "OFF."
2. Disconnect the PCM electrical connectors.
3. Check the IAT sensor signal circuit for a short to
ground.
Is the IAT sensor signal circuit shorted to ground?
6 Replace the IAT 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
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
148°C
(283°F)
—
–38°C
(–36°F)
—
—
must be
for
—
6E–153
Yes No
Go to OBD
System
Check
Go to Step 2
Go to Step 4 Go to Step 3
Refer to
Diagnostic
Refer to Test
Aids
Description
Go to Step 6 Go to Step 5
Verify repair Go to Step 7
Verify repair —
Verify repair —