Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1263

6E1–128

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

be useful in determining vehicle mileage since the
Diagnostic Trouble Code was last set.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart:
2. Verifies that the fault is present.

3. If Diagnostic Trouble Code P0112 can be repeated

only by duplicating the Failure Records condition,
refer to the Temperature vs. Resistance Value table.

The table may be used to test the IAT sensor at
various temperatures to evaluate the possibility of a
”shifted” sensor that may be stored above or below a
certain temperature. If this is the case, replace the
IAT sensor. If the IAT sensor appears to be OK, the
fault is intermittent; refer to Diagnostic Aids.

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

6E1–129

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P0112 Intake Air Temperature (IAT) Sensor Circuit Low Input 

 

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

Diagnostic Trouble Code 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

—

6E1–130

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) 

P0113 INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT HIGH INPUT

060R100027

Circuit Description

The intake air temperature (IAT) sensor is a thermistor
which measures the temperature of the air entering the
engine. The powertrain control module (PCM) applies 5
volts through a pull–up resistor to the IAT sensor. When
the intake air is cold, the sensor resistance is high and the
PCM will monitor a high signal voltage on the IAT signal
circuit. If the intake air is warm, the sensor resistance is
lower causing the PCM to monitor a lower voltage.
Diagnostic Trouble Code P0113 will set when the PCM
detects an excessively high signal voltage on the intake
air temperature sensor signal circuit.  DTC P0113 is a
Type A Code.

Conditions for Setting the DTC

D

The engine has been running for over 240 seconds.

D

Vehicle speed is less than 32 km/h (20 mph).

D

ECT signal temperature is above 60

°

C (140

°

F).

D

Mass air flow is less than 20g/second.

D

IAT signal voltage almost 5 volts which indicates an
intake air temperature less than –39

°

C (–38

°

F) for a

total of 12.5 seconds over a 25–second period.

The above condition are met for 100 test failures within a
200 test sample (125 msec/test)

Action Taken When the DTC Sets

D

The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.

D

The PCM will use a default IAT valve based on PCM
inputs and engine run time.

D

The PCM will store conditions which were present
when the Diagnostic Trouble Code was set as Freeze
Frame and in the Failure Records data.

Conditions for Clearing the MIL/DTC

D

The PCM will turn the MIL OFF on the third consecutive
trip cycle during which the diagnostic has been run and
the fault condition is no longer present.

D

A history Diagnostic Trouble Code P0113 will clear
after 40 consecutive warm–up cycles have occurred
without a fault.

D

Diagnostic Trouble Code P0113 can be cleared by
using the Scan Tool’s ”Clear Info” function.

Diagnostic Aids

Check for the following conditions:

D

Poor connection at PCM – Inspect harness connectors
for backed–out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal–to–wire connection.

D

Damaged harness – Inspect the wiring harness for
damage, shorts to ground, shorts to battery positive,
and open circuits. If the harness appears to be OK,
observe the IAT display on the Tech 2 while moving
connectors and wiring harnesses related to the IAT
sensor. A change in the IAT display will indicate the
location of the fault.

6E1–131

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

If Diagnostic Trouble Code P0113 cannot be duplicated,
the information included in the Failure Records data can
be useful in determining vehicle mileage since the
Diagnostic Trouble Code was last set.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart:
2.Verifies that the fault is present.

3.If Diagnostic Trouble Code P0113 can be repeated

only by duplicating the Failure Records conditions,
refer to the ”Temperature vs. Resistance Values”
table. 

The table may be used to test the IAT sensor at
various temperatures to evaluate the possibility of a
”shifted” sensor that may be open above or below a
certain temperature. If this is the case, replace the
IAT sensor. If the IAT sensor appears to be OK, the
fault is intermittent; refer to Diagnostic  Aids.

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 P0113 Intake Air Temperature (IAT) Sensor Circuit High Input

 

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

Ignition ON, engine OFF. Observe the ”Intake Air
Temp” display on the Tech 2.

Is the ”Intake Air Temp” below the specified value?

5V –38

°

C

(–36

°

F)

Go to Step 4 

Go to Step 3 

3

1. Ignition ON, engine OFF.
2. Review and record Tech 2 Failure Records data

parameters.

3. Operate the vehicle within Failure Records

conditions as noted.

4. Using a Tech 2, monitor “Diagnostic Trouble Code”

info for Diagnostic Trouble Code P0113.

Does the Tech 2 indicate Diagnostic Trouble Code
P0113 failed?

—

Refer to Test

Description 

Refer to

Diagnostic

Aids 

4

1. Ignition OFF.
2. Disconnect the IAT sensor electrical connector.
3. Jumper the IAT signal circuit and the sensor ground

circuit together at the IAT sensor harness
connector.

4. Ignition ON.
5. Observe the ”Intake Air Temp” display on the Tech

2.

Is the ”Intake Air Temp” at the specified value?

0V 140

°

C

(284

°

F)

Go to Step 6 

Go to Step 5