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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 27 (Engine Controls - 5.7L - Diagnosis (DTC P0601- P2135)) >> Engine Controls Diagnosis >> DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

The number below refers to the step number on the diagnostic table.

  1. 2:  A DTC P0602 indicates the PCM is not programmed.
DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610

Step Action Yes No
1 Did you perform the Diagnostic System Check-Engine Controls? Go to Step 2  Go to Diagnostic System Check - Engine Controls
2  Is DTC P0602 set? Go to Step 3  Go to Step 5 
3 Program the powertrain control module (PCM). Refer to Service Programming System (SPS) in Programming.
Does DTC P0602 reset?		 Go to Step 4  Go to Step 6 
4
  1. Ensure that all tool connections are secure.
  2. Ensure that the programming equipment is operating correctly.
  3. Ensure that the correct software/calibration package is used.
  4. Attempt to program the PCM. Refer to Service Programming System (SPS) in Programming.
Does DTC P0602 reset?		 Go to Step 5  Go to Step 6 
5 Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement .
Did you complete the replacement?		 Go to Step 6  -
6
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
Did the DTC fail this ignition?		 Go to Step 2  Go to Step 7 
7 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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