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Home >> Saturn >> 2006 >> Ion Red Line >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - DTC P1682 To DTC P2229 >> DTC P1682 >> Test Description

Test Description

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

  1. 3:  This step determines if there is voltage present to the ECM fuse.
  2. 5:  This step determines if voltage is present at the PCM.
  3. 6:  This step determines if the PCM ignition 1 voltage circuit is shorted to ground.
DTC P1682

Step Action Values Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Engine Controls Connector End Views or Powertrain Control Module (PCM) Connector End Views
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Turn ON the ignition, with the engine OFF for 10 seconds.
Does the DTC fail this ignition?		 - Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections
3  With a test lamp connected to ground, probe both sides of the 15-amp ECM/ETC fuse.
Does the test lamp illuminate on both sides of the fuse?		 - Go to Step 5  Go to Step 4 
4 Does the test lamp illuminate on one side of the fuse? - Go to Step 6  Go to Powertrain Relay Diagnosis
5 
  1. Turn OFF the ignition.
  2. Disconnect the powertrain control module (PCM).
  3. Test the ignition 1 voltage circuit that is supplied by the ECM/ETC fuse for an open or for a high resistance. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 9  Go to Step 7 
6 
  1. Turn OFF the ignition.
  2. Disconnect the PCM.
  3. Test the ECM/ETC ignition 1 voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs .
  4. Replace the fuse if necessary.
Did you find and correct the condition?		 - Go to Step 9  Go to Step 7 
7 Test for an intermittent and for a poor connection at the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?		 - Go to Step 9  Go to Step 8 
8 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 9  -
9
  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 10 
10 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 System OK
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