Workshop Manual

6E–392
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
3. If DTC P1112 can be repeated only by duplicating
the Failure Records conditions, refer to the
“Temperature vs. Resistance Value Chart”. The
chart may be used to test the IAT sensor at various
temperatures to evaluate the possibility of a
“shifted” sensor that may be shorted above or below
a certain temperature. If this is the case, replace
the IAT sensor.
Intake Air Temperature Sensor
°C °F OHMS
Temperature vs. Resistance Values
(approximate)
100 212 177
80 176 332
60 140 667
45 113 1188
35 95 1802
25 77 2796
15 59 4450
5 41 7280
–5 23 12300
–15 5 21450
–30 –22 52700
–40 –40 100700
DTC P1112 – IAT Sensor Circuit Intermittent 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 Is DTC P0112 also set?
—
Go to DTC
P0112 first
Go to Step 3
3 1. Check the IAT signal circuit between the IAT sensor
connector and the PCM for an intermittent short to
ground.
2. If a problem is found, repair as necessary.
Was a problem found?
— Verify repair
Refer to
Diagnostic
Aids