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 P0351: Ignition Coil 1 Control CircuitDTC P0352: Ignition Coil 2 Control Circuit
DTC P0353: Ignition Coil 3 Control Circuit
DTC P0354: Ignition Coil 4 Control Circuit
DTC P0355: Ignition Coil 5 Control Circuit
DTC P0356: Ignition Coil 6 Control Circuit
DTC P2300: Ignition Coil 1 Control Circuit Low Voltage
DTC 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
DTC P2312: Ignition Coil 5 Control Circuit Low Voltage
DTC P2313: Ignition Coil 5 Control Circuit High Voltage
DTC P2315: Ignition Coil 6 Control Circuit Low Voltage
DTC P2316: Ignition Coil 6 Control Circuit High Voltage
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Ignition Voltage - Bank 1 | P0300-P0306, P2300, P2306, P2312 | P0300-P0306, P0351, P0353, P0355 | -- | P0300, P0301, P0303, P0305 |
Ignition Voltage - Bank 2 | P0300-P0306, P2303, P2309, P2315 | P0300-P0306, P0352, P0354, P0356 | -- | P0300, P0302, P0304, P0306 |
Ignition Coil 1 Control Circuit | P2300 | P0301, P0351 | P2301 | P0300, P0301 |
Ignition Coil 2 Control Circuit | P2303 | P0302, P0352 | P2304 | P0300, P0302 |
Ignition Coil 3 Control Circuit | P2306 | P0303, P0353 | P2307 | P0300, P0303 |
Ignition Coil 4 Control Circuit | P2309 | P0304, P0354 | P2310 | P0300, P0304 |
Ignition Coil 5 Control Circuit | P2312 | P0305, P0355 | P2313 | P0300, P0305 |
Ignition Coil 6 Control Circuit | P2315 | P0306, P0356 | P2316 | P0300, P0306 |
Circuit/System Description
The ignition system on this engine uses individual ignition coils and ignition control (IC) circuits for each cylinder. Ignition voltage is supplied to each bank of ignition coils. The engine control module (ECM) controls the ignition system operation. The ECM controls each coil using the IC circuits. The ECM commands the IC circuit low when a spark event is requested.
The sequencing and timing are ECM controlled.
Conditions for Running the DTC
| • | The engine is operating. |
| • | The ignition voltage is between 10-18 volts. |
| • | The engine speed is less than 6,000 RPM. |
| • | The DTCs run continuously once per crankshaft revolution after the above conditions are met. |
Conditions for Setting the DTC
P0351-P0356
The ECM detects the ignition control circuit is open for greater than 4 seconds or a cumulative of 30 seconds.
P2300, P2303, P2306, P2309, P2312, or P2315
The ECM detects the ignition control circuit is shorted to ground for greater than 4 seconds or a cumulative of 30 seconds.
P2301, P2304, P2307, P2310, P2313, or P2316
The ECM detects the ignition control circuit is shorted to voltage for greater than 4 seconds or a cumulative of 30 seconds.
Action Taken When the DTC Sets
DTCs P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, and P2316 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, and P2316 are Type B DTCs.
Diagnostic Aids
| • | Inspect the ignition coils for aftermarket devices. An aftermarket device connected to the ignition coil circuits, may cause this DTC to set. |
| • | If the condition is intermittent, moving the related harnesses and connectors, with the engine operating, while monitoring the appropriate scan tool Misfire Current Cylinder, or the IC Circuit Test Status parameter may help to isolate the condition. An IC Circuit Test Status parameter will change from OK or Not Run to Fault if a condition is present. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electronic Ignition (EI) System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Operate the engine for 30 seconds. Observe the DTC information with a scan tool. DTC P0351, P0352, P0353, P0354, P0355, P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 should not set.
- Engine operating, observe the scan tool IC Circuit Test Status parameters, the IC Circuit Test Status parameters should display OK or Not Run.
- 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
- Ignition OFF, disconnect the harness connector at the appropriate ignition coil.
- Ignition ON, verify that a test lamp illuminates between the ignition voltage circuit terminal 2 and ground.
- Crank or start the engine. Test for 200-400 mV between the appropriate IC circuit terminal 1 and ground.
- Connect a test lamp between the each of the ground circuits terminal 3, and terminal 4, and B+. The test lamp should illuminate on each circuit.
- If all circuits/connections test normal, replace the ignition coil.
Note: The ignition circuit supplies voltage to other components. Make sure you test all circuits for a short to ground or test all components for being shorted that share the ignition circuit.
| ⇒ | If the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test all the components connected to the ignition voltage circuit and replace as necessary. |
| ⇒ | If less than the specified range, test the circuit for a short to ground or an open/high resistance. If the circuit/connection tests normal, replace the ECM. |
| ⇒ | If greater than the specified range, test the circuit for a short to voltage. If the circuit/connection tests normal, replace the ECM. |
| ⇒ | If the test lamp does not illuminate, test the suspected circuit for an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for engine control module replacement, setup, and programming |
