P2303
DTC P2300, P2301, P2303, P2304, P2306, P2307, P2309, or P2310
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P2300 00
- Ignition Coil 1 Control Circuit Low Voltage
DTC P2301 00
- Ignition Coil 1 Control Circuit High Voltage
DTC P2303 00
- Ignition Coil 2 Control Circuit Low Voltage
DTC P2304 00
- Ignition Coil 2 Control Circuit High Voltage
DTC P2306 00
- Ignition Coil 3 Control Circuit Low Voltage
DTC P2307 00
- Ignition Coil 3 Control Circuit High Voltage
DTC P2309 00
- Ignition Coil 4 Control Circuit Low Voltage
DTC P2310 00
- Ignition Coil 4 Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The ignition system uses individual ignition coil assemblies for each cylinder. The engine control module (ECM) controls the individual coils by transmitting timing pulses on the ignition control circuit of each ignition coil to enable a spark event. When the engine is running the ECM monitors each Ignition Coil circuit for improper voltage levels. Each ignition coil has the following circuits:
* Ignition voltage
* Ground
* Ignition control for each coil
* Low reference
Conditions for Running the DTC
* The engine speed is less than 6000 RPM.
* The ignition voltage is between 9-18 V.
* DTCs P2300 00, P2301 00, P2303, P2304 00, P2306 00, P2307 00, P2309 00, P2310 00 run continuously when the above conditions are met.
Conditions for Setting the DTC
* The ECM detects a short to ground on the circuit or the ignition coil for greater than 4 s continuously or 50 s cumulative.
OR
* The ECM detects a short to voltage on the circuit or the ignition coil for greater than 4 s continuously or 50 s cumulative.
Action Taken When the DTC Sets
DTCs P2120 00, P2122 00, P2123 00, P2125 00, P2127 00, P2128 00, and P2138 00 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P2120 00, P2122 00, P2123 00, P2125 00, P2127 00, P2128 00, and P2138 00 are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics ([1][2]Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Powertrain Diagnostic Trouble Code (DTC) Type Definitions)
Scan Tool Reference
Control Module References (Programming and Relearning)
Circuit/System Verification
1. Start and idle the engine.
2. Observe the scan tool misfire current cylinder parameters. The counters should not be incrementing.
3. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.
Circuit/System Testing
1. Ignition OFF, disconnect the T8 Ignition Coil connector
2. Ignition ON, test the affected circuit terminal for a short to ground or for a short to voltage for the appropriate T8 Ignition Coil:
* T8 Ignition Coil 1 Control Circuit terminal D
* T8 Ignition Coil 2 Control Circuit terminal E
* T8 Ignition Coil 3 Control Circuit terminal F
* T8 Ignition Coil 4 Control Circuit terminal G
• If a fault is found, repair the circuit as needed.
3. Ignition OFF, exchange the T8 Ignition Coil module with an T8 Ignition Coil module of a good car.
4. Start the engine and observe the scan tool.
• If the DTC or the misfire transfers with the suspect ignition coil/module, replace T8 Ignition Coil.
• If the DTC or the misfire does not transfer with the suspect T8 Ignition Coil module, replace the K20 Engine Control Module.
Repair Instructions
* Ignition Coil Replacement (Service and Repair)
* Control Module References (Programming and Relearning)
Repair Verification
If the customer concern was a flashing MIL, then perform the following procedure:
1. Install any components that have been removed or replaced during diagnosis.
2. Perform any adjustments, programming or setup procedures that are required when a component is removed or replaced.
3. Clear the DTCs.
4. Turn OFF the ignition for 60 s.
5. 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 (Diagnostic Trouble Code (DTC) List - Vehicle).
6. 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 00. Refer to DTC P0420 (P0420).