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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1076 (Engine Controls Diagnosis - 8.1L (DTC P0175 To P2610)) >> Diagnosis >> DTC P0351-P0358 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3:  This step verifies the integrity of the IC circuit and the PCM output.
  2. 4:  This step tests for a short to ground on the IC circuit.
DTC P0351-P0358

Step Action Values Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Powertrain Control Module (PCM) Connector End Views  or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check-Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
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 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 engine.
  2. Disconnect the respective ignition coil.
  3. Start the engine.
  4. Measure the frequency at the IC circuit with the DMM set to DC Hertz. Refer to Measuring Frequency in Wiring Systems.
Is the frequency within the specified range?		 3-20 Hz Go to Step 7  Go to Step 4 
4  Measure the voltage from the IC circuit of the ignition coil to a good ground with the DMM.
Is the voltage more than the specified value?		 1 V Go to Step 13  Go to Step 5 
5
  1. Turn OFF the ignition.
  2. Disconnect the PCM connector.
  3. Test the IC circuit between the ignition coil connector and the PCM connector for continuity with the DMM.
Does the DMM indicate continuity?		 - Go to Step 6  Go to Step 14 
6 Test the respective IC circuit for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 17  Go to Step 10 
7
  1. Turn ON the ignition, with the engine OFF.
  2. Probe the ignition 1 voltage circuit of the ignition coil with a test lamp that is connected to battery ground. Refer to Troubleshooting with a Test Lamp in Wiring Systems.
Does the test lamp illuminate?		 - Go to Step 8  Go to Step 11 
8 Probe the ground circuit of the ignition coil with a test lamp connected to battery voltage. Refer to Troubleshooting with a Test Lamp in Wiring Systems.
Does the test lamp illuminate?		 - Go to Step 9  Go to Step 12 
9 Test for an intermittent and for a poor connection at the ignition coil. 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 17  Go to Step 15 
10 Test for an intermittent and for a poor connection at the PCM. 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 17  Go to Step 16 
11 Repair the open in the ignition 1 voltage circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 17  -
12 Repair the open in the ground circuit for the ignition coil. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 17  -
13 Repair the IC circuit for a short to voltage. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 17  -
14 Repair open in the IC circuit. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 17  -
15 Replace the ignition coil. Refer to Ignition Coil(s) Replacement .
Did you complete the replacement?		 - Go to Step 17  -
16 Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement .
Did you complete the replacement?		 - Go to Step 17  -
17
  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 2  Go to Step 18 
18 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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