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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1748 (Manual Transmission - GETRAG 5 Speed) >> Diagnostic Information and Procedures >> Diagnostic System Check - Manual Transmission >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Saturn Vue. 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. 1:  This test ensures that the scan tool is getting power.
  2. 2:  This test ensures that the scan tool is communicating to the PCM.
  3. 3:  This test ensures that the PCM has the latest calibrations.
  4. 6:  This test checks to see if any related DTCs should be diagnosed first.
  5. 9:  This test checks to see if the customer concern is with Inspection and Maintenance (I/M) testing.
Diagnostic System Check - Manual Transmission

Step Action Yes No
1 
IMPORTANT:
  • Do NOT perform this test if no driveability condition exists.
  • Search for applicable bulletins before proceeding with the diagnosis.
  • Do not turn OFF the ignition when performing this diagnostic table.
  • Do NOT clear the DTCs unless the diagnostic instructs you to do so.
  1. Connect a scan tool to the data link connector (DLC).
  2. Turn ON the ignition, with the engine OFF.
Does the scan tool power-up?		 Go to Step 2  Go to Scan Tool Does Not Power Up in Data Link Communications
2  Does the scan tool display the PCM data? Go to Step 3  Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications
3  Does the PCM require a calibration update? Go to Step 11  Go to Step 4 
4 Does the scan tool display any PCM DTCs? Go to Step 5  Go to Step 8 
5 Record the Freeze Frame and Failure Records information with the scan tool.
Did you complete the action?		 Go to Step 6  -
6  Were any of the PCM DTCs P0601, P0602, or P1621? Go to DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, or P2610 Go to Step 7 
7 Was the DTC a P0502? Go to Diagnostic Trouble Code (DTC) List/Type  Go to DIAGNOSTIC SYSTEM CHECK -- ENGINE CONTROLS
8 Were any BCM DTCs set? Go to Diagnostic Trouble Code (DTC) List in Body Control System Go to Step 9 
9  Is the customer concern with the Inspection/Maintenance (I/M) testing? Go to INSPECTION/MAINTENANCE SYSTEM CHECK Go to Step 10 
10
  1. Using the scan tool, clear the DTCs.
  2. Start the engine. Idle at normal operating temperature.
  3. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Did a DTC set?		 Go to Diagnostic Trouble Code (DTC) List/Type  Go to Symptoms - Manual Transmission 
11 Update the PCM with the latest calibration as necessary.
Did you perform the task?		 Go to Step 12  -
12
  1. Clear all DTCs.
  2. Test drive the vehicle while shifting through all gears.
Does the system operate normally without setting any DTCs?		 System OK Go to Step 1 
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