2010 Cadillac Truck SRX FWD V6-3.0L Page 1459

2010 Cadillac Truck SRX FWD 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