Important: Do not perform this check if no driveability concern exists.
The Diagnostic System Check - Manual Transmission is an organized approach to identifying a condition created by an electronic engine control system malfunction. The Diagnostic System Check - Manual Transmission is the starting point for any driveability concern diagnosis. This directs the service technician to the next logical step in order to diagnose the concern. Understanding the table and using it correctly will reduce diagnostic time, and will prevent the replacement of good parts.
The numbers below refer to the step numbers on the diagnostic table.
This step ensures that the scan tool is getting power.
This step ensures that the scan tool is communicating to the PCM or ECM.
This step ensures that the PCM or ECM has the latest calibrations.
This step checks to see if any related DTCs should be diagnosed first.
This step checks to see if the customer concern is with Inspection and Maintenance (I/M) testing.
Step | Action | Yes | No | ||||||
---|---|---|---|---|---|---|---|---|---|
Important:
Does the scan tool power-up? | Go to Step 2 | Go to Scan Tool Does Not Power Up in Data Link Communications | |||||||
Does the scan tool display the PCM/ECM data? | Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications | |||||||
Does the PCM/ECM 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 | -- | ||||||
Were there any engine control DTCs P0601, P0602, P604, P0606, or any engine electrical DTCs P0562, P0563, P1637, P1638? | Go to DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 in Engine Controls - 6.6L or DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 in Engine Controls - 8.1L | Go to Diagnostic Trouble Code (DTC) List in Engine Electrical | |||||||
7 | Was the DTC a P0500, P0704 or P0833? | Go to Diagnostic System Check - Engine Controls in Engine Controls - 6.6L or Diagnostic System Check - Engine Controls in Engine Controls - 8.1L | |||||||
8 | Were any BCM DTCs set? | Go to Diagnostic Trouble Code (DTC) List in Body Control System | Go to Step 9 | ||||||
Is the customer concern with Inspection and Maintenance (I/M) testing? | Go to Inspection/Maintenance (I/M) System Check in Engine Controls - 6.6L or Inspection/Maintenance (I/M) System Check in Engine Controls - 8.1L | Go to Step 10 | |||||||
10 |
Did a DTC set? | ||||||||
11 | Update the PCM or ECM with the latest calibration, as necessary. Did you perform the task? | Go to Step 12 | -- | ||||||
12 |
Does the system operate normally without setting any DTCs? | System OK | Go to Step 1 |