Workshop Manual

6E–311
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0406 – EGR High Voltage (Cont'd)
Step NoYesValue(s)Action
11 1. Ignition “ON”.
2. Use a DVM to backprobe at terminal Connector of
EGR valve for voltage.
Was measured voltage more than 4.8 V?
more than
4.8 V
Go to Step 12 Go to Step 12
12 1. Ignition “ON”.
2. Stay the EGR harness connected.
3. Check voltage by backprobing at PCM S37
terminal.
Was voltage more than 4.8 V?
4.8 V Go to Step 16 Go to Step 13
13 1. Locate short circuit at EGR harness between
BLU/RED to GRY/RED or GRY/RED to YEL,
BLU/RED.
2. Replace EGR harness.
Is the action complete?
— Verify repair —
14 Replace EGR harness.
Is the action complete?
— Verify repair —
15 Replace the EGR valve.
Does DTC P1404 still fail “DTC test on the Tech 2?
— Go to Step 16 Verify repair
16 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 —