P0352

Electrical Diagram:

CIRCUIT DESCRIPTION

The ignition system on this engine uses an individual ignition coil/module for each cylinder. The PCM controls the ignition system operation. There are eight Ignition Control (IC) circuits, one per cylinder, that connect the PCM and ignition coil/modules. Each ignition coil/module have a power feed, a chassis ground circuit and a reference low circuit. The PCM causes a spark to occur by grounding the IC circuit, which signals the ignition module to trigger the ignition coil and fire the spark plug. Sequencing and timing are PCM controlled. This DTC sets when the IC circuit is out of range.


CONDITIONS FOR SETTING THE DTC

^ Ignition voltage is between 9.0 volts and 17.0 volts.

^ The PCM detects the ignition control circuit is grounded, open or shorted to a voltage.

^ All conditions met for less than 1 second.


ACTION TAKEN WHEN THE DTC SETS

^ The PCM illuminates the Malfunction Indicator Lamp (MIL) when the diagnostic runs and fails.

^ The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Freeze Frame and/or the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC

^ The PCM turns the MIL OFF after three consecutive drive trips that the diagnostic runs and does not fail.

^ A last test failed (current DTC) clears when the diagnostic runs and does not fail.

^ A History DTC clears after forty consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures.

^ The PCM battery voltage is interrupted.

^ Use a scan tool in order to clear the MIL/DTC.


DIAGNOSTIC AIDS

The following may be cause an intermittent:

^ Poor connections. Check for adequate terminal tension. Refer to Repair Procedures in Electrical Diagrams, Body and Accessories/Wiring Systems for proper procedure.

^ Corrosion

^ Mis-routed harness

^ Rubbed through wire insulation

^ Broken wire inside the insulation

Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This will isolate when the DTC failed. For an intermittent condition, refer to Symptoms. Testing and Inspection

TEST DESCRIPTION

The numbers below refer to the step numbers on the diagnostic table.

2. This step verifies that the fault is present.

4. This step checks the integrity of the IC circuit and the PCM output.

5. This step checks for a short to ground on the IC control circuit.