Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1302

6E1–284

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P0461 Fuel Level Sensor Circuit Range/Performance

 

Step

Action

Value(s)

Yes

No

1

Was the On–Board Diagnostic (OBD) System Check
performed?

—

Go to Step  2 

Go to

Powertrain

OBD System

Check 

2

1. Install the Tech 2.
2. Turn ON the ignition.
3. Compare the fuel level on the Tech 2 with the vehicle

fuel gauge.

Are the levels approximately the same?

—

Go to Step  3 

Go to Step  5 

3

1. Record the vehicle fuel gauge reading.
2. Turn OFF the ignition.
3. Disconnect the PCM’s connector.
4. Turn ON the ignition.

Did the vehicle fuel gauge reading change?

—

Go to Step  4 

Go to Step  5 

4

1. Turn the ignition OFF.
2. Disconnect the fuel tank level sensor connector.
3. Using a fused jumper wire, jump the fuel level input

to the fuel level sensor ground.

4. Turn the ignition ON.

Does the Tech 2 and the fuel gauge indicate the
specified value?

0% (Empty)

Go to Step  5 

Go to Step  6 

5

Replace the Fuel tank level sensor.

—

Go to Step  7 

—

6

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?

—

Go to Step  7 

—

7

1. Using the Tech 2, select the Diagnostic Trouble

Code, and Clear Info.

2. Start the engine.
3. Idle at the normal operating temperature.
4. Select the DTC and the Specific
5. Enter the DTC number which was set.
6. Operate the vehicle within the conditions for setting

this DTC.

Does the Tech 2 indicate that this diagnostic Ran and
Passed?

—

System OK

Go to Step  2 

6E1–285

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) 

P0462 FUEL LEVEL SENSOR CIRCUIT LOW INPUT

060R100041

Circuit Description

The Fuel Level Sensor is an important input to the PCM
for the Enhanced Evaporative System Diagnostic.  The
PCM needs the fuel level information in order to know the
volume of fuel in the tank.  The fuel level affects the rate of
change in air pressure in the EVAP system.  Several of
the Enhanced Evaporative System Diagnostic sub–test
are dependent upon correct fuel level information.  The
diagnostic will not run when the tank is greater than 85%
or less than 15% full.  (This sensor signal disables the
misfire when the fuel levels are less than 15%).  If the
PCM detects a continuous short to ground in the Fuel
Level sensor or circuit, then a code P0462 will set. DTC
P0462 is a type D code.

Conditions for Setting the DTC

D

The Fuel Level signal voltage is less than 0.06 volts.
The condition is met for 150 test failures within 200 test
samples.

Action Taken When the DTC Sets

D

The PCM will not turn on the MIL.

Conditions for Clearing the DTC

D

The PCM turns the MIL OFF after 3 consecutive
driving trips without a fault condition present.

D

A history Diagnostic Trouble Code will clear if no fault
conditions have been detected for 40 warm–up cycles
(coolant temperature has risen 40

°

F from the start–up

coolant temperature and the engine coolant
temperature exceeds 160

°

F during that same ignition

cycle) or the Tech 2 clearing feature has been used.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart:
4. This step checks the wiring, connections, and the

PCM.

6. This step checks the wiring, connections, and the

PCM.

6E1–286

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P0462 Fuel Level 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

Powertrain

OBD System

Check 

2

1. Install the Tech 2.
2. Ignition ON.
3. Observe the fuel level on the Tech 2.

Does the Tech 2 display the specified value?

0%–1%

Go to Step  4 

Go to Step  3 

3

Refer to Fuel Gauge Diagnosis.

—

—

—

4

With a Digital Voltmeter (DVM) to ground, probe the
fuel level sensor input at the Fuel Level sensor.

Is the voltage less than the specified value?

0.13 V

Go to Step  5 

Go to Step  6 

5

Check for a open in the fuel level sensor input circuit.

Was a problem found?

—

Go to Step  7 

Go to Step  6 

6

With a DVM to ground, probe the fuel level module
output at the Fuel Level sensor.

Is the voltage greater than the specified value?

2.9 V

Go to Step  9 

Go to Step

10 

7

Repair the open in the fuel level sensor input circuit.

Is the action complete?

—

Go to Step

11 

—

8

Repair the open in the fuel level output circuit.

Is the action complete?

—

Go to Step

11 

—

9

Repair the short to voltage in the fuel level output
circuit.

Is the action complete?

—

Go to Step

11 

—

10

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?

—

Go to Step

11 

—

11

1. Using the Tech 2, select the DTC and the Clear Info.
2. Start the engine.
3. Idle at the normal operating temperature.
4. Select the Diagnostic Trouble Code and the

Specific.

5. Enter the number which was set.
6. Operate the vehicle within the conditions for setting

this Diagnostic Trouble Code as specified in the
supporting text.

Does the Tech 2 indicate that this diagnostic Ran and
Passed?

—

System OK

Go to Step  2 

6E1–287

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) 

P0463 FUEL LEVEL SENSOR CIRCUIT HIGH INPUT

060R100041

Circuit Description

The Fuel Level sensor is an important input to the PCM for
the Enhanced Evaporative System Diagnostic.  The PCM
needs the fuel level information in order to know the
volume of fuel in the tank. The fuel level affects the rate of
change in air pressure in the EVAP system. Several of the
Enhanced Evaporative System Diagnostic sub–tests are
dependent upon correct fuel level information. The
diagnostic will not run when the tank is greater than 85%
or less than 15% full.  (This sensor signal disables the
misfire when the fuel levels are less than 15%). If the PCM
detects a continuous short to voltage in the Fuel Level
sensor or circuit, then a DTC P0463 will set.  DTC P0463
is a type D code.

Conditions for Setting the DTC

D

The Fuel Level signal voltage is greater than 4.94 volts.
The condition is met for 150 test failures within 200 test
samples.

Action Taken When the DTC Sets

D

The PCM will not turn on the MIL.

Conditions for Clearing the DTC

D

The PCM turns the MIL off after 3 consecutive driving
trips without a fault condition present. 

D

A history DTC will clear if no fault conditions have been
detected for 40 warm–up cycles (coolant temperature
has risen 40

°

F from the start–up coolant temperature

and the engine coolant temperature exceeds 160

°

F

during that same ignition cycle) or the Tech 2 clearing
feature has been used.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart:
5. This step checks the wiring, connections, and the

PCM.

7. This step checks the wiring, connections, and the

PCM.