Workshop Manual

6E–463
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
B Poor connection at PCM-Inspect harness connectors
for backed out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal to wire connection.
B Damaged harness-Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
moving connectors and wiring harnesses related to the
sensor.
B A change in the display will indicate the location of the
fault. If DTC P1311 cannot be duplicated, the
information included in the Failure Records data can be
useful in determining vehicle mileage since the DTC
was last set.
B If it is determined that the DTC occurs intermittently,
performing the DTC P1311 Diagnostic Chart may
isolate the cause of the fault.
DTC P1311 - ION Sensing Module SEC Line 1 Circuit Fault
Step Action Value(s) Yes No
1 Was the “On-Board (OBD) System Check” performed?
— Go to Step 2
Go to OBD
System
Check
2 1. Ignition “ON”, engine “OFF”.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor “DTC” info for DTC P1311.
Does the Tech 2 indicate DTC P1311 failed this
ignition?
— Go to Step 3
Refer to
Diagnostic
Aids
3 1. Ignition “OFF”.
2. Disconnect the ION Sensing module.
3. Disconnect the PCM.
Is the action complete?
— Go to Step 4 Go to Step 3
4 Check the ION Sensing module harness between the
PCM and ION Sensing module circuit at the ION
Sensing module harness connector.
Was a problem found?
— Verify repair Go to Step 5
5 1. Disconnect the ignition coil.
Is the action complete?
— Go to Step 6 Go to Step 5
6 Check the ION Sensing module harness between the
ignition coil and ION Sensing module circuit at the SEC
line 1 harness connector.
Was a problem found?
— Verify repair Go to Step 7
7 Check the following items;
1. Ignition coil and ignition coil circuit.
2. Ignition coil ground circuit for a poor connection.
3. If a problem is found, repair wiring harness as
necessary.
Was a problem found?
— Verify repair Go to Step 8
8 Replace the Ignition coil.
Is the action complete?
— Verify repair Go to Step 9
9 Check the following items;
1. ION Sensing module ground circuit for a poor
connection.
2. If a problem is found, repair wiring harness as
necessary.
Was a problem found?
— Verify repair Go to Step 10