Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 1303

6E1–288

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P0463 Fuel Level 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

Powertrain

OBD System

Check 

2

1. Install the Tech 2.
Observe the fuel level on the Tech 2.

Does the Tech 2 display the specified value?

99% – 100%

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 Sensor Input cavity.

Is the voltage greater than the specified value?

2.9 V

Go to Step  5 

Go to Step  6 

5

Check for a open in the Fuel Level sensor ground.

Was a problem found?

—

Go to Step  7 

Go to Step  6 

6

Check for an open in the Fuel Level sensor ground.

Was a problem found?

—

Go to Step  9 

Go to Step

10 

7

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

Is the repair complete?

—

Go to Step

11 

—

8

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

Is the repair complete?

—

Go to Step

11 

—

9

Repair the open in the fuel level sensor ground.

Is the repair complete?

—

Go to Step

11 

—

10

Replace the PCM.

IMPORTANT: The replacement PCM must be
reprogrammed. Refer to PCM
Replacement/Programming. 

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 Diagnostic Trouble Code 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 

6E1–289

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

Diagnostic Trouble Code (DTC) P0464 Fuel Level Sensor Noisy Signal

060R100041

Circuit Description

The fuel level sensor is an important input to powertrain
control module (PCM) for the enhanced evaporative
system diagnostic.  Fuel level information is needed for
the PCM to know the volume of fuel in the tank.  The fuel
level affects the rate of change in air pressure in the
evaporative system.
The sending unit is a float in the fuel tank which moves a
wiper arm across a variable resistor.  Low fuel level
causes high resistance in the sending unit, and this is
recognized by the PCM because the circuit operates at a
corresponding low voltage.  When the circuit is
continuously open or has a high resistance connection,
DTC P0464 is set.

Conditions for Setting the DTC

D

No Fuel level DTC’s set.

D

Fuel volume level is more than 3%.

D

IAT is more than –10

°

C.

D

Engine is Running.

When there are 40 test failures within 60 test samples, it is
stored.

Action Taken When the DTC Sets

D

The PCM records the operating conditions at the time
the diagnostic fails. The Failure Records buffers stores
this information.

D

A history DTC is stored.

D

The PCM will not illuminate the Malfunction Indicator
Lamp (MIL).

Conditions for Clearing the DTC

D

A history DTC clears after 40 consecutive warm up
cycles without a fault.

D

The Tech 2 can clear the DTC.

Diagnostic Aids

D

Damaged harness–Inspect the wiring harness for
damage.  If the harness appears to be OK, observe the
fuel level display on the scan tool while moving
connectors and wiring harnesses related to the sensor.
A change in the display will indicate the location of the
fault.

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Chart.
8. The following chart can be used to check the

sending unit:

6E1–290

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DTC P0464 Fuel Level Sensor Noisy Signal

 

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 “Off”, Engine “Off”.
2. Perform “Visual/Fiscal Check” for following point.

D

Loosen harness connector

D

Clacked harness connector

D

Poor wires condition

D

Fuel tank condition

D

Poor sensor condition

3. If a problem is found, repair as necessary.

Was a problem found?

—

Verify repair

Go to 

Step 3

3

1. Disassemble fuel tank on the vehicle.
2. Check the below items.

D

Fuel sender.

Was a problem found?

—

Go to 

Step 4

Go to 

Step 5

4

Replace the Fuel sender.

Was the action completed?

—

Verify repair

Go to 

Step 5

5

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.

Was the action complete?

—

—

—

6E1–291

RODEO Y22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

DIAGNOSTIC TROUBLE CODE (DTC) 

P0480 COOLING FAN 1 CONTROL CIRCUIT MALFUNCTION

060R100042