Isuzu 2000 Trooper Workshop Manual page 1220

Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
DTC P0463– Fuel Level Sensor Circuit –High Voltage
Step
1 Was the "On-Board Diagnostic (OBD) System Check"
performed?
2 1. Disconnected the fuel level sensor harness from its
connector at the fuel tank.
2. Ignition "ON," engine "OFF."
3. Using a DVM, measure the voltage between the
sensor harness positive and ground wires.
Is the voltage approximately equal to the specified
value?
3 With the negative DVM lead connected to ground, use
the positive DVM lead to probe the sensor ground wire
with the harness still disconnected.
Does the DVM indicate a short to a voltage source?
4 Repair short to voltage between the sensor and the
PCM.
Is the repair complete?
5 With the negative DVM lead connected to ground, use
the positive DVM lead to probe the sensor positive wire
with the harness still disconnected.
Does the DVM indicate a voltage greater than the
specified value?
6 Open circuit between the PCM connector and the fuel
level sensor?
7 Replace the PCM.
IMPORTANT: The
programmed.
Powertrain Control
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?
8 Remove the fuel level sensor and check the following:
D
Does the arm move freely?
D
Are the wire leads shorted together?
D
Do the resistance values match the specification
chart?
Was a problem found?
9 Replace the fuel level sensor.
Is the repair complete?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
2. The ETC and MAP sensors share a ground at PCM
terminal D9.
9. Equates the resistance values at various float
positions to the following fuel gauge readings:
Value(s)
—
5 V
—
—
5 V
—
must be
for
—
—
—
6E–351
Yes No
Go to OBD
System
Go to Step 2 Check
Go to Step 8 Go to Step 3
Go to Step 4 Go to Step 5
Verify repair —
Go to Step 4 Go to Step 6
Verify repair Go to Step 7
Verify repair —
Go to Step 9 Go to Step 7
Verify repair —