Isuzu 2000 Trooper Workshop Manual page 978

Step
11 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?
12 1. Reconnect the fuel pump relay.
2. Disconnect the fuel pump electrical connector at the
fuel tank.
3. Using a test light connected to ground, probe the
fuel pump feed wire (harness side).
4. Command the fuel pump "ON" with a Tech 2.
Did the light illuminate for 2 seconds?
13 1. Honk the horn to verify that the horn relay is
functioning.
2. Substitute the horn relay for the fuel pump relay.
3. Leave the test light connected as in step 12.
4. Command the fuel pump "ON" with the Tech 2.
Did the test light illuminate for 2 seconds when the fuel
pump was commanded "ON?"
14 1. Re-connect the horn relay in its proper location.
2. Check for a short circuit, blown fuse or open circuit
between the relay and the fuel tank.
Is the action complete?
15 1. With the fuel pump electrical connector at the fuel
tank disconnected, connect a test light between the
feed wire and the ground wire (harness side).
2. Command the fuel pump "ON" with a Tech 2.
Did the test light illuminate for 2 seconds?
16 Repair the open circuit in the fuel pump ground wire.
Is the action complete?
17 1. Re-connect the horn relay in its proper location.
2. Replace the fuel pump relay.
Is the action complete?
18 Replace the fuel pump.
Is the action complete?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Fuel System Electrical Test (Cont'd)
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
must be
for
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6E–109
Yes No
Verify repair —
Go to Step 15 Go to Step 13
Go to Step 17 Go to Step 14
Verify repair —
Go to Step 18 Go to Step 16
Verify repair —
Verify repair —
Verify repair —