Grand AM V6-3300 3.3L (1992)
3.
This test checks the ability of the ECM to control the "SES" light. With the diagnostic terminal grounded, the "SES" light should flash a Code 12
three times, followed by any trouble code stored in memory. A MEM-CAL error may result in the inability to flash Code 12.
4. Most of the diagnostic charts use a Scan Tool to aid diagnosis, therefore, serial data must be available. If a MEM-CAL error is present, the ECM
may have been able to flash Code 12 or 51, but not transmit serial data.
5.
Although the ECM is powered up, a "Cranks But Will Not Run" symptom could exist because of an ECM or system problem.
6.
This step will isolate if the customer complaint is a "SES" light or a driveability problem with no "SES" light. Refer to trouble code description for
a list of valid codes. An invalid code may be the result of a faulty scan tool, MEM-CAL or ECM.
7.
Comparison of actual control system data with the typical values is a quick check to determine if any parameter is not within limits. Keep in mind
that a base engine problem (i.e. advanced cam timing) may substantially alter sensor values.
8.
If the actual data is not within the typical values established, the C-Charts charts will provide a functional check of the suspect component of
system.
