P0354
DTC P0351-P0356
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 P0351
- Ignition Coil 1 Control Circuit
DTC 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
Diagnostic Fault Information
Circuit/System Description
The ignition system on this engine uses an individual coil for each cylinder. The engine control module (ECM) controls the spark event for each cylinder through the 6 individual ignition control circuits. When the ECM commands the ignition control circuit ON, electrical current will flow through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM will command the ignition control circuit OFF, interrupting current flow through the primary winding. The magnetic field created by the primary winding will collapse across the secondary coil windings, producing a high voltage across the spark plug electrodes. The ECM uses information from the crankshaft position (CKP) sensor, and the camshaft position (CMP) sensor for sequencing and timing of the spark events. The ECM monitors each ignition control circuit for improper voltage levels. Each ignition module/coil assembly has the following electrical circuits:
* An ignition voltage circuit
* A ground
* An IC control circuit
* A low reference circuit
Conditions for Running the DTC
* The engine is cranking or running.
* Ignition Voltage greater than 5 V.
* The DTCs run continuously when the above condition is met.
Conditions for Setting the DTC
The engine control module detects that the Voltage command state and the actual state of the control circuit do not match.
Action Taken When the DTC Sets
DTCs P0351, P0352, P0353, P0354, P0355, and P0356 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0351, P0352, P0353, P0354, P0355, and P0356 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views A/C Compressor Clutch
Description and Operation
Electronic Ignition System Description Description and Operation
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 Control Module References for scan tool information
Special Tools
EL 26792 - Spark Tester
Circuit/System Verification
1. Engine running.
2. Verify the parameters listed below do not display Malfunction:
* Ignition Coil 1 Control Circuit Low Voltage Test Status
* Ignition Coil 1 Control Circuit Open Test Status
* Ignition Coil 1 Control Circuit High Voltage Test Status
* Ignition Coil 2 Control Circuit Low Voltage Test Status
* Ignition Coil 2 Control Circuit Open Test Status
* Ignition Coil 2 Control Circuit High Voltage Test Status
* Ignition Coil 3 Control Circuit Low Voltage Test Status
* Ignition Coil 3 Control Circuit Open Test Status
* Ignition Coil 3 Control Circuit High Voltage Test Status
* Ignition Coil 4 Control Circuit Low Voltage Test Status
* Ignition Coil 4 Control Circuit Open Test Status
* Ignition Coil 4 Control Circuit High Voltage Test Status
* Ignition Coil 5 Control Circuit Low Voltage Test Status
* Ignition Coil 5 Control Circuit Open Test Status
* Ignition Coil 5 Control Circuit High Voltage Test Status
* Ignition Coil 6 Control Circuit Low Voltage Test Status
* Ignition Coil 6 Control Circuit Open Test Status
* Ignition Coil 6 Control Circuit High Voltage Test Status
• If Malfunction is displayed
Refer to Circuit/System Testing.
• If Malfunction is not displayed
3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
4. Verify DTC P0351-P0356 does not set.
• If any of the DTCs are set
Refer to Circuit/System Testing.
• If none of the DTCs are set
5. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate T8 Ignition Coil. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 5 ohms between the ground circuit terminal A and ground.
• If 5 ohms or greater
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 5 ohms
3. Test for less than 5 ohms between the low reference circuit terminal B and ground.
• If 5 ohms or greater
1. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K20 Engine Control Module.
• If less than 5 ohms
4. Ignition ON.
5. Verify a test lamp illuminates between the ignition circuit terminal D and ground.
• If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF.
2. Test for less than 2 ohms in the ignition circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF, disconnect all T 8 Ignition Coils.
2. Test for infinite resistance between the ignition circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Replace the fuse, ignition ON
4. Verify the fuse is good after connecting each T 8 Ignition Coil one at a time.
• If the fuse opens, replace the T 8 Ignition Coil that opens the fuse when connected.
• If the fuse is good, replace the K20 Engine Control Module.
• If the test lamp illuminates
6. Ignition OFF, disconnect the X3 harness connector at the K20 Engine Control Module.
7. Test for infinite resistance between the harness connector at the T8 Ignition Coil control circuit terminal C and ground.
• If less than infinite resistance
Repair the short to ground on the circuit.
• If infinite resistance
8. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater
Repair the open/high resistance in the circuit.
• If less than 2 ohms
9. Ignition ON.
10. Test for less than 1 V between the control circuit and ground.
• If 1 V or greater
Repair the short to voltage on the circuit.
• If less than 1 V
11. Ignition OFF, exchange the suspect T8 Ignition Coil with the T8 Ignition Coil of a known functioning cylinder.
12. Engine running.
13. Verify the scan tool Ignition Coil Control Circuit Status parameter displays OK for the same cylinder that the suspect T8 Ignition Coil was removed from.
• If OK is not displayed
Replace the K20 Engine Control Module.
• If OK is displayed
Test or replace the suspect T8 Ignition Coil.
Component Test
Note: You must perform the Circuit/System Testing before proceeding with Component Testing.
1. Ignition OFF, connect the EL 26792 - spark tester to the appropriate T8 Ignition Coil.
2. Engine running.
3. Verify the spark output of the T8 Ignition Coil.
• If no output or the output is weak
Replace the T8 Ignition Coil.
• If the output is normal
4. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Ignition Coil Replacement - Bank 1 Ignition Coil Replacement - Bank 1
* Ignition Coil Replacement - Bank 2 Ignition Coil Replacement - Bank 2
* Control Module References Control Module References for engine control module replacement, programming, and setup