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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Control System - 4.6L (LH2) - DTC P0135 To P0391) >> DTC P0351-P0358 >> Conditions for Clearing the MIL/DTC

Conditions for Clearing the MIL/DTC

WARNING: This page is about a different variant/trim than selected.
DTC P0351-P0358

Step Action Values Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls Connector End Views or Engine Control Module Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. 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.
Did the DTC fail this ignition?
- Go to Step 3  Go to Intermittent Conditions
3
  1. Turn OFF the ignition.
  2. Disconnect the harness connector of the ignition coil/module for the affected cylinder.
  3. Disconnect the harness connector of the fuel injector of the affected cylinder.
  4. Start the engine.
  5. Measure in DC Hertz between the ignition control (IC) circuit and the low reference circuit of the ignition coil/module with a DMM.
Is the frequency within the specified range?
3-20 Hz Go to Step 5  Go to Step 4 
4 Measure in DC Hertz between the IC circuit of the ignition coil/module and a good ground with a DMM.
Is the frequency within the specified range?
3-20 Hz Go to Step 7  Go to Step 6 
5
  1. Turn OFF the ignition.
  2. Connect the harness connector of the fuel injector of the affected cylinder.
  3. Exchange the ignition coil/module of the affected cylinder with the ignition coil/module of a known good cylinder.
  4. Start the engine.
  5. Observe the Misfire counter parameters with a scan tool.
Does the cylinder misfire transfer with the suspected ignition coil/module?
- Go to Step 10  Go to Step 8 
6 Test the IC circuit of the ignition coil/module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 14  Go to Step 11 
7 Test the low reference circuit of the ignition coil/module for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 14  Go to Step 11 
8 Test the IC circuit of the ignition coil/module for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 14  Go to Step 9 
9 Test the low reference circuit of the ignition coil/module for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 14  Go to Step 11 
10 Test for an intermittent and for a poor connection at the ignition coil/module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 14  Go to Step 12 
11 Test for an intermittent and for a poor connection at the engine control module (ECM). Refer Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
- Go to Step 14  Go to Step 13 
12 Replace the ignition coil/module. Refer to Ignition Coil Replacement - Bank 1 or Ignition Coil Replacement - Bank 2 .
Did you complete the replacement?
- Go to Step 14  -
13 Replace the ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
Did you complete the replacement?
- Go to Step 14  -
14
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. 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.
Did the DTC fail this ignition?
- Go to Step 3  Go to Step 15 
15 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?
- Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information System OK