Isuzu 1999 RODEO Workshop Manual page 1611

6E2–368
RODEO 6VD1 3.2L ENGINE DRIVEABILITY AND EMISSIONS
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
Temperature vs. Resistance Values (approximate)
100
80
60
45
35
25
15
5
–5
–15
–30
–40
DTC P1112 –IAT Sensor Circuit Intermittent Low Voltage
Step
1 Was the "On-Board Diagnostic (OBD) System Check"
performed?
2 Is DTC P0112 also set?
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?
°F
OHMS
212 177
176 332
140 667
113 1188
95 1802
77 2796
59 4450
41 7280
23 12300
5 21450
–22 52700
–40 100700
Action Value(s) Yes
Go to Step 2
—
Go to DTC
— P0112 first
— Verify repair
No
Go to OBD
System
Check
Go to Step 3
Refer to
Diagnostic
Aids