Workshop Manual

6E–308
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0405 – EGR Low Voltage (Cont'd)
Step NoYesValue(s)Action
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?
Less than
0.1 V
Go to Step 13 Go to Step 18
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?
— Go to Step 14 Go to Step 18
14 Locate and repair the short to ground in the pintle
position circuit
Is the action complete?
— Verify repair —
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?
Less than
0.1 V
Go to Step 17 Go to Step 16
16 Check for a short circuit between other wires and the
pintle position circuit
Is there any short circuit?
—
Repair short
circuit and then
Verify repair
Go to Step 17
17 Replace the EGR valve.
Does DTC P1404 still fail “DTC test on the Tech 2?
— Go to Step 18 Verify repair
18 Examine the PCM pin and terminal connection.
Was there a damaged terminal?
— Go to Step 4 Go to Step 19
19 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.
Is the action complete?
— Verify repair —