2010 Cadillac Truck SRX FWD V6-3.0L Page 1469

2010 Cadillac Truck SRX FWD V6-3.0L Page 1469

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 or P0430.

P0356

DTC P0351-P0356 (LF1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/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/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