Workshop Manual

6E–469
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
be useful in determined vehicle mileage since the
DTC was last set.
If it is determined that the DTC occurs intermittently,
performing the DTC P1326 Diagnostic Chart may
isolate the cause of the fault.
DTC P1326 - ION Sensing Module Combustion
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 P1326.
Does the Tech 2 indicate DTC P1326 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 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 ICSS 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