Introduction To Diagnostic Testing
To select a desired diagnostic feature, diagnostic system must first be programmed to display ".7.0" on FDC. ".7.0" indicates system is ready for a diagnostic feature to be selected. To cause ".7.0" to be displayed on FDC, see ENTERING SELF-DIAGNOSTICS and DISPLAYING TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM. See Fig 1 . With ".7.0" displayed, technician may select any of the following diagnostic tests.
- PCM Switch Tests
- PCM Data Parameters
- PCM Code Snapshot
- PCM Instant Snapshot
- PCM Output Cycling
- PCM Output Overrides
- BCM Data Parameters
- ECC Panel Program Override
Technician may also choose to clear codes or exit diagnostics. See CLEARING TROUBLE CODES and EXITING DIAGNOSTICS under SELF-DIAGNOSTIC SYSTEM.