Isuzu 2000 Trooper Workshop Manual page 1188

Step
12 1. Ignition "ON".
2. Backprobe with a DVM to measure voltage at PCM
sensor ground pin and pintle position pin.
Was voltage in range?
13 1. Ignition "OFF".
2. Disconnect the EGR harness.
3. Check short circuit between EGR pintle position
circuit and EGR ground circuit.
Was any short circuit?
14 Locate and repair the short to ground in the pintle
position circuit
Is the action complete?
15 1. Ignition "OFF".
2. Disconnect the PCM.
3. Ignition "ON".
4. Measure the voltage between the EGR pintle
position circuit and ground.
Is the measured voltage near the specified value?
16 Check for a short circuit between other wires and the
pintle position circuit
Is there any short circuit?
17 Replace the EGR valve.
Does DTC P1404 still fail "DTC test on the Tech 2?
18 Examine the PCM pin and terminal connection.
Was there a damaged terminal?
19 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?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0405 – EGR Low Volt (Cont'd)
Action
replacement PCM
Refer to On-Vehicle Service in
Module and Sensors
Value(s)
Less than
0.1 V
—
—
Less than
0.1 V
—
—
—
must be
for
—
6E–319
Yes No
Go to Step 13 Go to Step 18
Go to Step 14 Go to Step 18
Verify repair —
Go to Step 17 Go to Step 16
Repair short
circuit
Go to Step 17
Verify repair
Go to Step 18 Verify repair
Go to Step 4 Go to Step 19
Verify repair —