Workshop Manual

6E–307
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0405 – EGR Low Voltage
Step Action Value(s) Yes No
1 Was the “On-Board Diagnostic (OBD) System Check”
performed?
— Go to Step 2
Go to OBD
System
Check
2 1. Ignition “ON”, engine “OFF”, review and record
Tech 2 Failure Records Data.
2. Operate the vehicle within Failure Records
conditions as noted.
3. Using a Tech 2, monitor “DTC” info for DTC P0405
until the DTC P0405 test runs. Note the result.
Does the Tech 2 indicates DTC P0405 failed this
ignition?
— Go to Step 3
Refer to
Diagnostic
Aids
3 1. Disconnect the EGR valve harness connector.
2. Inspect the EGR valve and connectors for damaged
pin or terminals.
Were there any damaged pins or terminals?
— Go to Step 4 Go to Step 5
4 Repair the damaged pin or terminal.
Is the action complete?
— Verify repair —
5 1. Disconnect the EGR harness connector.
2. Ignition “ON”.
3. At the EGR valve, use a DVM to check the voltage
at the 5 volt reference wire (BLU/RED) and ground.
Did the DVM indicate the specified value?
4–6 V Go to Step 6 Go to Step 7
6 1. Disconnect the EGR harness connector.
2. Measure resistance between terminal 5 volt
reference wire and ground.
Was resistance in range?
5–5.5 KW Go to Step 10 Go to Step 17
7 1. Ignition “ON”.
2. At the PCM connector, backprobe with a DVM at the
5 volt reference for the EGR valve.
Did the DVM indicate the specified value?
4–6 V Go to Step 8 Go to Step 18
8 Repair the open 5 volt reference circuit.
Is the action complete?
— Verify repair —
9 Repair the damaged sensor ground wire.
Is the action complete?
— Verify repair —
10 1. Disconnect the EGR harness
2. Use an ohmmeter to measure between the pintle
position pin and the sensor ground pin on the EGR
valve.
NOTE: J-35616 Connector Test Adapter Kit may be
useful for gaining access to the recessed pins on the
valve.
Was the ohmmeter reading approximately equal to the
specified value?
1 to 1.25 KW Go to Step 13 Go to Step 17
11 1. Ignition “ON”.
2. Backprobe with a DVM to measure voltage at EGR
valve pintle position pin and sensor ground pin.
Was voltage in range?
Less than
0.1 V
Go to Step 17 Go to Step 12