Workshop Manual

6E–472
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
A change in the display will indicate the location of
the fault. If DTC P1340 cannot be duplicated, the
information included in the Failure Records data can
be useful in determining vehicle mileage since the
DTC was last set.
If it is determined that the DTC occurs intermittently,
performing the DTC P1340 Diagnostic Chart may
isolate the cause of the fault.
DTC P1340 - ION Sensing Module Cylinder ID Fault
(Cylinder Synchronization Fail)
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 P1340.
Does the Tech 2 indicate DTC P1340 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 ICSS module circuit at the QC line 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 ION
Sensing Module 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