2010 Cadillac Truck SRX AWD V6-3.0L Page 1459
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/module for each cylinder. The engine control module (ECM) controls the spark event for
each cylinder through the eight 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 sensor, and the camshaft position sensor for sequencing and timing of the spark events.
Conditions for Running the DTC
* The engine is running.
* The ignition voltage is greater than 6 V.
* DTC P0351-P0356 runs continuously when the above conditions are met.
Conditions for Setting the DTC
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 5 s.
Action Taken When the DTC Sets
DTCs P0351-P0356 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P0351-P0356 are Type B DTCs.
Diagnostic Aids
A high resistance condition on any ignition control circuit can cause an engine misfire without setting DTC P0351-P0356.
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic
Ignition System Description)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
