Workshop Manual

6E–151
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0112–IAT Sensor Circuit Low Voltage
Step Action Value(s) Yes No
1 Was the “On-Board Diagnostic (OBD) System Check”
performed?
— Go to Step 2
Go to OBD
System
Check
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?
148°C
(283°F)
Go to Step 4 Go to Step 3
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?
—
Refer to Test
Description
Refer to
Diagnostic
Aids
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?
–38°C
(–36°F)
Go to Step 6 Go to Step 5
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?
— Verify repair Go to Step 7
6 Replace the IAT sensor.
Is the action complete?
— Verify repair —
7 Replace the PCM.
IMPORTANT: The replacement PCM must be
programmed. Refer to On-Vehicle Service in
Powertrain Control Module and Sensors for
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?
— Verify repair —