ECM Snapshot
NOTE:
If directed here from TEST TYPE SELECTION under MANUAL OPERATION OF SELF-DIAGNOSTICS in this article, go to step 2).
- SNAPSHOT allows the recall of system operating specifications present at the exact time an ECM malfunction code was set. Up to 3 snapshots may be recalled. To enter snapshot complete the following:
- Enter self-diagnostics. See ENTERING SELF-DIAGNOSTICS under SELF-DIAGNOSTIC SYSTEM in this article.
- Display trouble codes stored in memory. See DISPLAYING TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM in this article.
- Select ECM system for testing. See STEP 1: SYSTEM SELECTION under MANUAL OPERATION OF SELF-DIAGNOSTICS in this article.
- Select SNAPSHOT test type. See STEP 2: TEST TYPE SELECTION under MANUAL OPERATION OF SELF-DIAGNOSTICS in this article .
- Immediately following the selection of "SNAPSHOT?", the system will display "EXXX". The letter "E" stands for ECM. XXX is used here to represent the 3-digit code stored in ECM snapshot. During ECM snapshot display, a 3-digit code will appear in place of XXX.
- Depressing the LO button on the ECC panel will allow scrolling through the list of ECM diagnostic codes for which the BCM has stored a snapshot. See ECM TROUBLE CODES table for list of available ECM trouble codes and the system malfunctions they represent. It is possible, however, that a desired snapshot has NOT been set, in which case, exit SNAPSHOT by depressing the RESET/RECALL button on the DIC section of the CCDIC.
- At this point, depressing the LO button will result in the "TAKE ECM SNAPSHOT?" display. Depressing the LO button again will return the display to the first "EXXX" snapshot display.
- Depressing the HI button will cause the "ECM SNAP DATA?" or "ECM SNAP INPUTS?" to be displayed and will select that test type. At this point the display is controlled as it would be for the non-snapshot data and input displays, however, all values and status information represent memorized vehicle conditions.