Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC P2300: Ignition Coil 1 Control Circuit Low VoltageDTC P2301: Ignition Coil 1 Control Circuit High Voltage
DTC P2303: Ignition Coil 2 Control Circuit Low Voltage
DTC P2304: Ignition Coil 2 Control Circuit High Voltage
DTC P2306: Ignition Coil 3 Control Circuit Low Voltage
DTC P2307: Ignition Coil 3 Control Circuit High Voltage
DTC P2309: Ignition Coil 4 Control Circuit Low Voltage
DTC P2310: Ignition Coil 4 Control Circuit High Voltage
Diagnostic Fault Information
Circuit | Short to Ground | High Resistance | Open | Short to Voltage | Signal Performance |
|---|---|---|---|---|---|
Ignition Coil 1 Control Circuit | P2300 | -- | -- | P2301 | -- |
Ignition Coil 2 Control Circuit | P2303 | -- | -- | P2304 | -- |
Ignition Coil 3 Control Circuit | P2306 | -- | -- | P2307 | -- |
Ignition Coil 4 Control Circuit | P2309 | -- | -- | P2310 | -- |
Circuit/System Description
The ignition system uses individual ignition coil/module assemblies for each cylinder. The engine control module (ECM) controls the individual coils by transmitting timing pulses on the ignition control (IC) circuit of each ignition coil/module to enable a spark event. When the engine is running the ECM monitors each IC circuit for improper voltage levels. Each ignition coil/module has the following circuits:
| • | An ignition voltage circuit |
| • | A ground |
| • | An IC control circuit |
| • | A low reference circuit |
Conditions for Running the DTCs
| • | The engine speed is less than 6,000 RPM. |
| • | The ignition 1 voltage signal is between 9-18 volts. |
| • | DTCs P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, run continuously when the above conditions are met. |
Conditions for Setting the DTCs
| • | The ECM detects a short to ground on the circuit or the ignition coil/module for greater than 4 seconds continuously or 50 seconds cumulative. |
| OR |
| • | The ECM detects a short to voltage on the circuit or the ignition coil/module for greater than 4 seconds continuously or 50 seconds cumulative. |
Action Taken When the DTC Sets
DTCs P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, are Type B DTCs.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Circuit/System Verification
| • | Start and idle the engine. |
| • | Observe the scan tool DTC Information and the Misfire Current Cylinder parameters. This will indicate the affected ignition coil/modules, and if the condition is current. |
Circuit/System Testing
- Turn ON the ignition
- Test the affected IC circuit for a short to ground or for a short to voltage.
- Start the engine.
- Test the affected IC circuit for a short to ground or for a short to voltage.
- Ignition OFF, exchange the affected ignition coil/module with the ignition/coil module of a good cylinder.
- Start the engine and observe the scan tool.
| ⇒ | If a fault is found, repair the circuit as needed. |
| ⇒ | If a fault is found, repair the circuit as needed. |
| ⇒ | If the DTC or the misfire transfers with the suspect ignition/coil module, replace as needed. |
| ⇒ | If the DTC or the misfire does not transfer with the suspect ignition/coil module, replace the ECM. |
Repair Instructions
| • | Control Module References for ECM replacement, setup, and programming |
Repair Verification
If the customer concern was a flashing MIL, then perform the following procedure:
- Install any components that have been removed or replaced during diagnosis.
- Perform any adjustments, programming or setup procedures that are required when a component is removed or replaced.
- Clear the DTCs.
- Turn OFF the ignition for 60 seconds.
- If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List - Vehicle and perform the appropriate diagnostic procedure.
- To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair Verification for DTC P0420. Refer to DTC P0420 .
