Isuzu 2000 Trooper Workshop Manual page 1218

DTC P0462– Fuel Level Sensor Circuit –Low 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 1. Ignition "ON," engine "OFF."
2. With a DVM, backprobe the PCM connector at the
terminal which supplies 5 volts to the fuel level
sensor.
Is the voltage approximately equal to the specified
value?
4 1. Ignition "ON," engine "OFF."
2. Fuel level sensor disconnected from wiring
harness.
3. With a DVM, probe the 5-volt supply wire at the
sensor harness.
Is the voltage approximately equal to the value
measured in Step 4?
5 Check for open or high resistance connection in the
ground wire between the PCM and the fuel level
sensor.
Is the action complete?
6 Remove the fuel level sensor and check the following:
D
Does the arm move freely?
D
Are the wires open or intermittently open when
wiggled?
D
Do the resistance values match the specification
chart?
Was a problem found?
7 Replace the fuel level sensor.
Is the action complete?
8 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?
9 Short to ground between the PCM connector and the
fuel level sensor.
Is the action complete?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
—
5 V
5 V
—
—
—
—
must be
for
—
—
6E–349
Yes No
Go to OBD
System
Check
Go to Step 2
Go to Step 6 Go to Step 3
Go to Step 4 Go to Step 9
Go to Step 5 Go to Step 9
Verify repair —
Go to Step 7 Go to Step 9
Verify repair —
Verify repair —
Verify repair —