Isuzu 1999 RODEO Workshop Manual page 749

6E1–122 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Input
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
Diagnostic Trouble Code 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. 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?
Action
replacement PCM must
Module and Sensors
Value(s)
— Go to Step 2
148°C
(283°F) Go to Step 4
Refer to Test
—
Description
–38°C
(–36°F) Go to Step 6
— Verify Repair
— Verify Repair
be
for
— Verify Repair
Yes No
Go to OBD
System
Check
Go to Step 3
Refer to
Diagnostic
Aids
Go to Step 5
Go to Step 7
—
—